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fgdata/Aircraft-yasim/yf23-yasim.xml

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Initial revision.
2003-04-21 14:18:07 +00:00
<!-- There weren't many YF23s - just the two prototypes - and I
couldn't find much 'hard' information so a lot of this fdm is
guess work (GW).
-->
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<!-- Max take off wieght is 64000lb but I imagine that this
includes some weapons so I'm allocating 8000lb to his and
subtracting it from the max wieght.
Initial revision.
2003-04-21 14:18:07 +00:00
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
I got a figure of 24000lb for the fuel load from a web site.
this seems rather high to me but until I can get a better
figure it'll have to do.
Initial revision.
2003-04-21 14:18:07 +00:00
-->
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<airplane mass="32000">
Initial revision.
2003-04-21 14:18:07 +00:00
<!-- Approach configuration -->
<!-- From GW & photos -->
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<approach speed="130" aoa="5">
Lee Elliott: Here's a quick update to the yf23 fdm and auto-pilot settings. It flies and takes-off reasonably well - still haven't tried landing it yet;) It can still be a bit wobbly at times though and It's not very good at terrain following either. Taking off on auto-pilot is quite fun. Set full flaps and CTRL-a (assuming you're near sea level), hit F6 to make it go straight and apply power - about 50% until it rotates then apply full power. Retract the gear as soon as it gets off the ground and by the time you#ve done that, retract the flaps. Quite entertaining from a tower view:) It's not really an ideal a/c to model but apart from the aesthetics, which appeal to me, I was curious about not having a rudder. There's a new texture sheet too but it only makes the a/c a paler shade of grey.
2003-05-28 15:11:22 +00:00
<control-setting axis="/controls/engines/engine[0]/throttle" value="0.15"/>
<control-setting axis="/controls/engines/engine[1]/throttle" value="0.15"/>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<control-setting axis="/controls/engines/engine[0]/afterburner" value="0"/>
<control-setting axis="/controls/engines/engine[1]/afterburner" value="0"/>
<control-setting axis="/controls/flight/flaps" value="1"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-setting axis="/controls/flight/slats" value="0"/>
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-setting axis="/controls/gear/gear-down" value="1"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</approach>
<!-- Cruise configuration -->
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<cruise speed="600" alt="55000">
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-setting axis="/controls/engines/engine[0]/throttle" value="0.9"/>
<control-setting axis="/controls/engines/engine[1]/throttle" value="0.9"/>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<control-setting axis="/controls/engines/engine[0]/afterburner" value="0"/>
<control-setting axis="/controls/engines/engine[1]/afterburner" value="0"/>
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-setting axis="/controls/flight/flaps" value="0.0"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-setting axis="/controls/flight/slats" value="0"/>
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-setting axis="/controls/gear/gear-down" value="0"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</cruise>
<cockpit x="5.70" y="0.00" z="1.26"/>
<!-- Fuselage entries for the fuselage proper and the two
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
engine housings.
Initial revision.
2003-04-21 14:18:07 +00:00
-->
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<!-- Fuselage -->
Initial revision.
2003-04-21 14:18:07 +00:00
<fuselage ax="10.00" ay="0.00" az="0.00"
bx="-2.00" by="0.00" bz="0.00"
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
width="1.6" taper="0.5" midpoint="0.5"/>
<!-- Left engine housing -->
Initial revision.
2003-04-21 14:18:07 +00:00
<fuselage ax="-2.00" ay="1.80" az="0.00"
bx="-8.00" by="1.20" bz="0.60"
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
width="1.2" taper="0" midpoint="0.3"/>
<!-- Right engine housing -->
Initial revision.
2003-04-21 14:18:07 +00:00
<fuselage ax="-2.00" ay="-1.80" az="0.00"
bx="-8.00" by="-1.20" bz="0.60"
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
width="1.2" taper="0" midpoint="0.3"/>
Initial revision.
2003-04-21 14:18:07 +00:00
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<!-- Lots of guesswork here -->
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<wing x="-2.00" y="0.00" z="0.25" length="6.66" chord="12.00" taper="0.08"
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
sweep="0" dihedral="0" camber="0.001" incidence="0.0" idrag="1.6">
<stall aoa="25" width="3" peak="1.3"/>
<flap0 start="0.36" end="0.63" lift="1.3" drag="1.8"/>
<flap1 start="0.63" end="0.89" lift="1.2" drag="1.8"/>
<slat start="0.36" end="0.89" aoa="6" drag="1.3"/>
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<!-- Shortened wing that starts outboard of the engine intakes.
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<wing x="-2.00" y="2.40" z="0.25" length="4.2" chord="8.1"
taper="0.19" sweep="0" dihedral="0" camber="0.0" incidence="0.0">
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<stall aoa="35" width="2" peak="1.3"/>
<flap0 start="0.0" end="0.42" lift="1.5" drag="1.6"/>
<flap1 start="0.42" end="0.833" lift="1.05" drag="1.3"/>
-->
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/flight/flaps" control="FLAP0"/>
<control-input axis="/controls/flight/aileron" control="FLAP1" split="true"/>
<control-input axis="/controls/flight/aileron-trim" control="FLAP1" split="true"/>
Initial revision.
2003-04-21 14:18:07 +00:00
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-input axis="/controls/flight/slats" control="SLAT"/>
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<control-input axis="/controls/flight/rudder" control="FLAP1" split="true" invert="true"/>
<control-input axis="/controls/flight/spoilers" control="FLAP0"/>
<control-input axis="/controls/flight/spoilers" control="FLAP1" invert="true"/>
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<control-output control="FLAP0" prop="/surface-positions/left-flap-pos-norm"/>
<control-output control="FLAP0" prop="/surface-positions/right-flap-pos-norm"/>
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<control-output control="FLAP1" side="left" prop="/surface-positions/left-aileron-pos-norm"/>
<control-output control="FLAP1" side="right" prop="/surface-positions/right-aileron-pos-norm"/>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-output control="SLAT" side="left" prop="/surface-positions/left-slat-pos-norm"/>
<control-output control="SLAT" side="right" prop="/surface-positions/right-slat-pos-norm"/>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<control-speed control="FLAP0" transition-time="2"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-speed control="FLAP1" transition-time="0.5"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-speed control="SLAT" transition-time="0.5"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</wing>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<hstab x="-8.70" y="2.40" z="0.36" length="3.30" chord="5.10"
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
taper="0.11" sweep="0" dihedral="40" camber="0.01" effectiveness="2">
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<stall aoa="24" width="2" peak="1.3"/>
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<flap0 start="0" end="1" lift="1.25" drag="1.4"/>
Initial revision.
2003-04-21 14:18:07 +00:00
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/flight/elevator" control="FLAP0"/>
<control-input axis="/controls/flight/elevator-trim" control="FLAP0"/>
Initial revision.
2003-04-21 14:18:07 +00:00
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<control-input axis="/controls/flight/rudder" control="FLAP0" split="true" square="false" invert="true"/>
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<control-output control="FLAP0" side="left" prop="/surface-positions/left-elevator-pos-norm"/>
<control-output control="FLAP0" side="right" prop="/surface-positions/right-elevator-pos-norm"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-speed control="FLAP0" transition-time="0.5"/>
</hstab>
Lee Elliott: Here's an update to the yf23. I've added a couple of small details to the model and played with the textures a bit:) Still no response from the chap at NASA about sticking their logos on it yet. I've also been fiddling with the fdm. It had been bugging me that I couldn't find any sign of air/speed brakes but just recently I found that braking is done by moving the ailerons up and the flaps down, in opposition to each other, which I thought was pretty neat really. This was actually pretty easy to mimic - although there are no spoiler surfaces defined in the YASim wing entry I was still able to map the spoiler control input to the ailerons and flaps, and once I'd got the directions right it seems to work - hit the spoilers and the ailerons move up, the flaps drop and the energy worm shows that I'm losing speed. The downside is that the flaps and the ailerons have to have similar lift and drag characteristics, to balance each each other, and this means that it ends up with the flaps not giving much lift and the brakes not having much affect at low speeds. If I could change the deflection rates then I could balance them that way (and improve the rudder control too) - as it is, the deflection for the flaps and ailerons is the same, just in opposite directions. This sounds like a job for interpolation tables but I haven't tried them yet and I don't know if I can use them in this way in YASim. The opposing flap/aileron techique is also used for manuevering e.g. by using it on just one side but I haven't tried to incorporate that yet;) Landing it is proving to be tricky - it gets down smoothly to about 20ft then what I presume is ground effect kicks in and upsets the trim. The only answer appears to be to force the nose down at this point. What's more, it needs to be held down untill you trim the elevator out otherwise it'll happily roll along on it's main gear, with it's nose in the air:) There's definitely not enough drag either.
2003-06-12 02:27:15 +00:00
<!-- I couldn't find a figure for the mass so it's guess work.
Initial revision.
2003-04-21 14:18:07 +00:00
-->
<jet x="-6.26" y="1.20" z="0.60" mass="3000" thrust="24500" afterburner="35000">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/engines/engine[0]/throttle" control="THROTTLE"/>
<control-input axis="/controls/engines/engine[0]/afterburner" control="REHEAT"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</jet>
<jet x="-6.26" y="-1.20" z="0.60" mass="3000" thrust="24500" afterburner="35000">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/engines/engine[1]/throttle" control="THROTTLE"/>
<control-input axis="/controls/engines/engine[1]/afterburner" control="REHEAT"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</jet>
<!-- Front -->
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<gear x="5.25" y="0.00" z="-2.25" compression="0.65" spring="2.5">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/flight/rudder" control="STEER" square="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-input axis="/controls/gear/gear[0]/wheel[0]/brake" control="BRAKE"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/>
<control-output control="STEER" prop="/gear/gear[0]/steering-norm"/>
Lee Elliott: I've attached an update for the yf23 and I think I've included all the right files - the model is unchanged (I think I'll eventually paint it in an imaginary NASA scheme, perhaps a bit like the HIDEC F-15, until I can get some newer pictures and see what they've done with it) so I've not included it again. The fdm still needs quite a bit of work - it can be a bit twitchy and wobbly at times, and the auto-pilot roll-out and smooth need tightening up, but it's flyable. Haven't tried landing it yet though;)
2003-05-28 15:09:30 +00:00
<control-speed control="EXTEND" transition-time="4"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</gear>
<!-- Left main -->
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<gear x="-2.20" y="1.92" z="-2.9" compression="2.0" spring="2.5">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-input axis="/controls/gear/gear[1]/wheel[0]/brake" control="BRAKE"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-output control="EXTEND" prop="/gear/gear[1]/position-norm"/>
<control-speed control="EXTEND" transition-time="4"/>
</gear>
<!-- Right main -->
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<gear x="-2.20" y="-1.92" z="-2.9" compression="2.0" spring="2.5">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
Lee Elliott: I've made some changes to the yf-23 fdm again:) and re-done the panels for both a/c.
2003-08-28 15:33:17 +00:00
<control-input axis="/controls/gear/gear[2]/wheel[0]/brake" control="BRAKE"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-output control="EXTEND" prop="/gear/gear[2]/position-norm"/>
<control-speed control="EXTEND" transition-time="4"/>
</gear>
<!-- Canopy -->
<gear x="4.1" y="0.0" z="1.05" retract-time="7" compression="0.6">
Fixes from Andy Ross: + The wing stall angle was weird, as mentioned earlier. Values greater than 45° don't have much physical meaning. I changed it to 25, which should be closer to a realistic value. + The lift="1.1" on the elevator flaps wasn't quite enough to get the aircraft into the approach AoA. I changed it to 1.2, and it works. It's still not as responsive as I'd have expected (then again, this is a big aircraft...). + The hstab effectiveness was negative. This is wrong, as this is a multiplier for all force generated by the surface. A surface with a negative value will produce thrust instead of drag. :) Maybe this was needed because the elevator was rigged backwards somewhere else? I changed it + The wing and hstab had very small stall widths (very sharp stalls). Low aspect wings should have gentle stalls, not sharp ones. I changed it to 15 as a guess. + There's no rudder input mapped. This can be done with a "split" input to the tails in exactly the same way that the aireron works on the wing. It will simply add to the elevator input. V-tail Bonanzas will require the same treatment.
2003-04-21 17:39:39 +00:00
<control-input axis="/controls/gear/parking-brake" control="EXTEND"/>
Initial revision.
2003-04-21 14:18:07 +00:00
<control-speed control="EXTEND" transition-time="10"/>
<control-output control="EXTEND" prop="/canopy/position-norm"/>
</gear>
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<!-- The locations and capcities are guesswork. -->
Initial revision.
2003-04-21 14:18:07 +00:00
<!-- Fuselage tank -->
<tank x="1.5" y="0" z="0.68" jet="true" capacity="8000"/>
<!-- Left wing tank -->
<tank x="-1.40" y="2" z="0.0" jet="true" capacity="8000"/>
<!-- Right wing tank -->
<tank x="-1.40" y="-2" z="0.0" jet="true" capacity="8000"/>
<!-- Avionics -->
<ballast x="4" y="0" z="0.6" mass="3000"/>
<!-- Cockpit and radar -->
<ballast x="7" y="0" z="0.2" mass="1500"/>
<!-- Pilot -->
<ballast x="5.8" y="0" z="0.6" mass="200"/>
<!-- Trim ballast -->
Lee Elliott: I've been messing with the yf23 some more. I think it flies a bit better now and has more reasonable auto-pilot take-off characteristics - just apply full power and go, and it doesn't go into such a steep climb. Out of curiosity, I've also taken the rudder control input and linked it to the stabilators/elevators and ailerons. Now, with some slick joystick manipulation it's possible to fly it at about 30 deg off-axis in more or less level flight (actually, with full 'rudder' input, it looks nearer to 40 deg to me and you end up tracing a very long curve). If no rudder input is used it flies 'normally'. I'd like to be able to 'tune' it so that it's more stable while transitioning but I'm not sure if that's going to be possible. It's also high-lighted some problems I'm having with my Sidewinder joystick - when I use the rudder control, the engine No.2 throttle jumps to 50% unless auto-throttle is engaged (this also happens with the b52 too), and there seems to be some interaction between the different axis if all three (roll, pitch and rudder) are changed at the same time - difficult to be sure on that one though. I'll probably un-map the throttle control from the joystick as I tend to use the keyboard for engine control anyway, especially for landing.
2003-06-04 17:54:08 +00:00
<ballast x="6" y="0" z="0.0" mass="2000"/>
Initial revision.
2003-04-21 14:18:07 +00:00
</airplane>
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