Hey, it looks like we've got a 182rg in the fleet!
On 01/13/2007 12:08 AM, Ron Jensen wrote:
> There is a bug I just found in the FDM generator (aeromatic). Change the
> three lines in c182/c182rg.xml
> from
> <retractable>RETRACT</retractable>
> to
> <retractable>1</retractable>
>
> and you will get an effect on the landing, and perhaps an effect on the
> aerodynamics as well ( I just crashed to verify the landing and haven't
> flown the model enough to tell about the aero )
It definitely affects the aerodynamics. At 100kias, retracting
the gear gives a bit more than 500 fpm of additional rate-of-climb.
It also messes with the trim.
Just for fun I retracted the gear while parked on the taxiway,
with the engine at idle. The resulting crash was spectacularly
histrionic, with the aircraft leaping wildly into the air in
gross violation of conservation of energy and other laws of
physics. But I'm not really complaining. I'm more interested
in preventing gear-up landings than in watching them.
Here are the three changes in detail:
===================================================================
RCS file: c182rg.xml,v
retrieving revision 1.1
diff -u -r1.1 c182rg.xml
--- c182rg.xml 2007/01/13 05:15:28 1.1
+++ c182rg.xml 2007/01/13 05:15:50
@@ -71,7 +71,7 @@
<damping_coeff unit="LBS/FT/SEC"> 600 </damping_coeff>
<max_steer unit="DEG"> 20 </max_steer>
<brake_group> NONE </brake_group>
- <retractable>RETRACT</retractable>
+ <retractable>1</retractable>
</contact>
<contact type="BOGEY" name="LEFT_MAIN">
<location unit="IN">
@@ -86,7 +86,7 @@
<damping_coeff unit="LBS/FT/SEC"> 1600 </damping_coeff>
<max_steer unit="DEG"> 0.0 </max_steer>
<brake_group> LEFT </brake_group>
- <retractable>RETRACT</retractable>
+ <retractable>1</retractable>
</contact>
<contact type="BOGEY" name="RIGHT_MAIN">
<location unit="IN">
@@ -101,7 +101,7 @@
<damping_coeff unit="LBS/FT/SEC"> 1600 </damping_coeff>
<max_steer unit="DEG"> 0.0 </max_steer>
<brake_group> RIGHT </brake_group>
- <retractable>RETRACT</retractable>
+ <retractable>1</retractable>
</contact>
<contact type="STRUCTURE" name="TAIL_SKID">
<location unit="IN">
> Since you've fixed [gear handle angles] please share :)
===================================================================
RCS file: cessna_gear_control.xml,v
retrieving revision 1.1
diff -u -r1.1 cessna_gear_control.xml
--- cessna_gear_control.xml 2007/01/12 19:22:56 1.1
+++ cessna_gear_control.xml 2007/01/12 21:54:23
@@ -5,7 +5,8 @@
<type>rotate</type>
<object-name>gearhandle</object-name>
<property>controls/gear/gear-down</property>
- <factor>20</factor>
+ <factor>40</factor>
+ <offset-deg>-20</offset-deg>
<center>
<x-m>-0.054</x-m>
<y-m>0</y-m>
> I made the knob 2.5 cm thick and 5 cm in diameter. The lever is 12.5 cm
> in diameter
more likely 12.5 mm ;-)
> and ~15 cm long. Probably too long even though I embedded
> about 1/3 of it in the panel. Can you get actual dimensions?
Soon. In the meantime a 2x scale-down has got to be pretty close.
That would make the shiny shaft 1/4" in diameter, which is a very
plausible value, and consistent with my recollections. The black
knob can't be much more than 1" in diameter.
======================
If you're looking for one more touch of realism, you can implement
the squat switch. I suspect the relevant property is:
/gear/gear/wow
(where wow stands for Weight on Wheel).
Another touch of realism would be cowl flaps.
That raises a whole set of keyboard / user-interface questions that
are not airplane-specific and would be best discussed in a different
thread.
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