On Thursday 24 July 2003 22:15, Lee Elliott wrote:
> Hello All,
> 
> I think I've found a bit of a problem with the way that u/c gear is being 
> defined.
> 
> In the preferences file there's a single gear entry with three wheel entries 
> to handle the brakes.  While this is fine for light a/c with fixed gear, it 
> doesn't work right with larger a/c with retractable gear.
> 
> To model independent suspension we need to specify a gear entry for each 
gear 
> leg so we can get the individual compression for each one.  We can then 
> specify each of the wheels on each of the legs and specify the brakes for 
> each wheel.
> 
> While I can do this in the a/c config files, the brake settings in 
> preferences.xml seem to take precidence so I only end up with three brakes 
> working.  While this is ok on tricycles and tail draggers, it's not good for 
> a/c such as the 747 and b52, which both have four main gear legs, with four 
> and two brakes respectively, on each leg.
> 
> The AN225 I'm working on has 14 main gear legs (each with two wheels) + two 
> nose gear legs (again, two wheels each), so I'm seeing a few problems 
ahead;)
> 
> It seems to me that we may need to update the a/c configs that use a single 
> gear entry with multiple wheels to use individual gear entries for each leg 
> and then update the supporting files, such as preferences.xml, keyboard.xml 
> and the joystick configs to use the proper structure, allowing for up to six 
> wheels/brakes for each leg.
> 
> One benefit from getting everything set up like this is that it should make 
it 
> possible to model gear failures, from entire leg failures, through tyre 
> blow-outs, to individual brake failures.
> 
> Could someone check that I have actually got this right and I've not missed 
> something here?
> 
> If I haven't made a boo-boo, what is going to be the best way to deal with 
it?
> 
> LeeE

Well, I've got all four brakes working on all four main gear legs, and the 
brakes apply at the gear level, not the wheel level:(

However, I think this still leaves an issue with the settings in the joysticks 
and keyboard, which still refer to multiple wheels on a single gear element.

Any comments anyone?

LeeE


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