To enable full functionality of the K14 gun sight there are several things
that need to be done.
First change the <nasal> section of your *set.xml file so that it looks like the
following.
<nasal>
<!-- your other nasal files -->
<!-- the following three lines must be exactly like this -->
<K14>
<file>Aircraft/Instruments-3d/computing-gun-sights/Nasal/lead-computer.nas</file>
</K14>
</nasal>
Animation:
For dark conditions when cabin/cockpit illumination is used all of the K14 sight
is illuminated in response to
<property>/controls/lighting/cabin-norm</property>
If you are using a different property for your cabin/cockpit lights you will need to map your
lighting property to /controls/lighting/cabin-norm.
Aircraft Specific Properties:
The following properties will need to be set to configure the site for an aircraft.
The following five values can be found in the submodels.xnl configuration file.
/controls/armament/gunsight/z-gunOffsetFeet = Gun position on z axis relative to the sight line in feet.
Will = <z-offset>offset value</z-offset> + distance from
aircraft center line to sight line height.
/controls/armament/gunsight/y-gunOffsetFeet = Gun position on y axis relative to the sight line in feet.
Will = <y-offset>abs value</y-offset>
/controls/armament/gunsight/gunElevationDegrees = <pitch-offset>gun pitch setting</pitch-offset>
/controls/armament/gunsight/ballisticCoefficienct = <eda>xxxxx</eda>
/controls/armament/gunsight/muzzleVelocity = <speed>xxxxx</speed> = In feet per second
/controls/armament/gunsight/gunHarminizationRangeFeet = Range where the sight and the bullet
path cross is level flight in feet.
Below is an example from the P-51D using the K14A sight which needs some additional
settings to control power and lighting for the sight.
<controls>
<armament>
<gunsight>
<power-on type="int">0</power-on>
<intensity type="float">1.0</intensity>
<z-offsetFeet type="float">-4.0</z-offsetFeet>
<y-offsetFeet type="float">0.0</y-offsetFeet>
<scale type="float">0.6</scale>
<gunElevationDegrees type="float">3.8</gunElevationDegrees>
<ballisticCoefficienct type="float">0.00136354</ballisticCoefficienct>
<muzzleVelocity type="float">2900.0</muzzleVelocity>
<gunHarminizationRangeFeet type="float">900.0</gunHarminizationRangeFeet>
<range type="float">900.0</range> <!-- startup default -->
</gunsight>
</armament>
...
</controls>
