From bbaed6e5c84b3da257221f10e04f7c4307be8486 Mon Sep 17 00:00:00 2001 From: david <david> Date: Sun, 18 Aug 2002 18:00:36 +0000 Subject: [PATCH] Updated and corrected parameters, and made the pilot/copilot weights settable with the properties /yasim/j3cub/pilot-lb and /yasim/j3cub/copilot-lb. --- Aircraft-yasim/j3cub.xml | 31 ++++++++++++++++--------------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/Aircraft-yasim/j3cub.xml b/Aircraft-yasim/j3cub.xml index d48b12d5c..76bd4e162 100644 --- a/Aircraft-yasim/j3cub.xml +++ b/Aircraft-yasim/j3cub.xml @@ -26,10 +26,10 @@ since it is what the weight-and-balance site above uses. --> <!-- - 680lb empty weight less 200lb for engine (wild guess) - + 340 for pilot and passenger + 680lb empty weight. --> -<airplane mass="820"> +<!-- FIXME: this includes the engine; is that correct? --> +<airplane mass="680"> <!-- Approach configuration (actually touchdown, I think) --> <approach speed="25" aoa="16"> @@ -38,7 +38,7 @@ since it is what the weight-and-balance site above uses. </approach> <!-- Cruise configuration --> -<cruise speed="67" alt="8000"> +<cruise speed="67" alt="0"> <control-setting axis="/controls/throttle[0]" value="1.0"/> <control-setting axis="/controls/mixture[0]" value="1.0"/> </cruise> @@ -46,10 +46,8 @@ since it is what the weight-and-balance site above uses. <!-- pilot's eyepoint --> <cockpit x="-0.23" y="0" z="-0.30"/> -<!-- FIXME: midpoint (I don't understand it) --> -<!-- FIXME: taper (I just left in the C172 value) --> <fuselage ax="1.37" ay="0" az="-0.71" bx="-4.81" by="0" bz="-0.65" - width="0.71" taper="0.16" midpoint="0.83"/> + width="0.71" taper="0.16" midpoint="0.17"/> <!-- I treat it as a perfectly rectangular wing for now. Note that @@ -60,8 +58,7 @@ since it is what the weight-and-balance site above uses. Note that the J3 Cub has no flaps. With a stall speed of 25kt, who needs them? From what I've read, the ailerons add lots of drag. --> -<!-- FIXME: camber (used the C172 value) --> -<wing x="-0.80" y="0.42" z="0.0" taper="0.0" +<wing x="-0.80" y="0.42" z="0.0" taper="1.0" length="4.87" chord="1.60" sweep="0" dihedral="5" camber="0.1"> <stall aoa="16" width="6" peak="1.5"/> <flap0 start=".31" end="0.85" lift="1.5" drag="1.4"/> @@ -100,9 +97,9 @@ since it is what the weight-and-balance site above uses. <propeller radius="0.95" cruise-speed="60" cruise-rpm="2300" cruise-alt="8000" cruise-power="48" - takeoff-power="60" takeoff-rpm="2300" + takeoff-power="55" takeoff-rpm="2300" eng-power="65" eng-rpm="2700" - x="0.71" y="0" z="-0.65" mass="200" moment="8"> + x="0.71" y="0" z="-0.65" mass="150" moment="8"> <actionpt x="1.31" y="0" z="-0.65"/> <control-input axis="/controls/throttle[0]" control="THROTTLE"/> <control-input axis="/controls/starter[0]" control="STARTER"/> @@ -115,12 +112,12 @@ since it is what the weight-and-balance site above uses. <control-input axis="/controls/tailwheel-castering" control="CASTERING"/> </gear> -<gear x="0" y="0.89" z="-1.96" compression=".3"> <!-- left main --> +<gear x="0" y="0.95" z="-1.96" compression=".1"> <!-- left main --> <control-input axis="/controls/brakes[0]" control="BRAKE" split="true"/> <control-input axis="/controls/parking-brake" control="BRAKE" split="true"/> </gear> -<gear x="0" y="-0.89" z="-1.96" compression=".3"> <!-- right main --> +<gear x="0" y="-0.95" z="-1.96" compression=".1"> <!-- right main --> <control-input axis="/controls/brakes[1]" control="BRAKE" split="true"/> <control-input axis="/controls/parking-brake" control="BRAKE" split="true"/> </gear> @@ -132,7 +129,11 @@ since it is what the weight-and-balance site above uses. Note the tandem seating; the x values (arms) come from the weight-and-balance page cited at the start. --> -<ballast x="-0.23" y="0" z="-0.70" mass="170"/> <!-- pilot --> -<ballast x="-0.91" y="0" z="-0.70" mass="170"/> <!-- passenger --> + +<!-- pilot --> +<weight x="-0.23" y="0" z="-0.70" mass-prop="/yasim/j3cub/pilot-lb"/> + +<!-- passenger --> +<weight x="-0.91" y="0" z="-0.70" mass-prop="/yasim/j3cub/passenger-lb"/> </airplane>