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Gear droop

B

Bazzar

Messages
40
Country
australia
Anyone know a working code for

a) wheel bogey droop on airliners after takeoff and

b) gear droop on light aircraft once off the ground.

I want to simulate the way some light aircraft gear 'drops' when off compression, once in the air.I suppose the same code could be used for both?

This would be for FSX.

Thanks
 
What you call gear droop is "normal" modelling.

Typically you will model your gear at full "uncompressed" position - In your keyframes this is your fully extended, no weight on gear position - keyframe 100. Remember, keyframw 0 is your gear fully retracted, keyframe 200 is your gear under maximum compression. Therefore there is no "special" code to simulate the completely extended (or what you call - gear droop" on GA aircraft. An airplane with fixed gear simply has no animation from keyframe 0-99

For the bogies, I've seen XML coding for that, but I'll have to search the forums for that.
 
Felix is on it Bazz,


What I have done in the past is make a regular retraction rate with say 4 points between 0 and 100. Then after its all animated, slide over two of the 'mid' arc points that are between 1 and 4 (0 and 100) and bring them over close to point 0 or point 4 and burn a model to check its behaviour.


If though, you want hydraulics that 'droop' after bringing a gear into place, or as like say a gear door after landing, then Jess has a code for that. He made one based on time that begins a settling movement on the inner gear doors of a P-51 Mustang. (I dont know how he did it).

Cheers,

Bill
 
Hi Guys,

The gear on this thing is fixed, no retraction. On the ground, the gear takes the weight. If you go over a bump or a sleeping pilot,the gear will compress upward.OK, but when the plane leaves the ground, the gear extends beyond normal compression at rest, to a completely uncompressed state.

So, does the 'standard' U/C animation tag allow for this then?

Thanks for the help mates.
 
Bazzar said:
Thanks Felix, much obliged for the link. I reckon the code can be used for the drooping fixed gear opportunity also.

Model on dudes.
Click to expand...

NP. But, unless we're misunderstanding what you want to do - technically there is no "droop", on the landing gear. That is a matter of modelling the animations correctly.
 
Felix is entirely correct. If the gear animation is done properly, the gear will drop fully when off ground, settle to the normal "weight on wheels" position about half-way compressed, and "bottomed out" when hitting a bump! ;)
 
Thanks guys, I will experiment with the compression frames. I just thought there was a little trick to use here.
 
Hi
For fixed gear droop I normally do this :)
KF0 and KF100 gear at its fully drooped position,Kf150 gear position when aircraft standstill on the ground at max weight.kf200 position of gear under full compression
cheers
Wozza
 
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