posted 04-24- 04:53 PM               

I´m busy building a J21 out of the P38 and now I have a question:

When I start a mission with my J21 on the runway the first thing that happens is that the plane drops down on the runway from a few feet up. Why? I have noticed that several of the planes bounce a little, as if they´ve been dropped, but not as much as my J21. The P38 which my J21 is based on, doesn´t. I must have changed something or moved something in OPS when I´ve put the new parts together, but what??

Thanks/Robert

posted 04-24- 07:21 PM               

Ok. I found the coordinates(?) in the properties list.How do I visually see that they´re in the center? Can I see them in BodyPts mode? There are BodyPts in what at least appear to be the center of the wheels, still the strange behaviour I described above occurs. I edited the coordinates and I did notice some changes in the game, none to the better though .
Well, as you understand I´m still puzzled, so if you, or anybody else could explain further, please do.

/Robert

posted 04-25- 03:44 PM               

Thanks for your help! I will search the forum´s vaults for tips

Since I wrote yesterday I have changed some things on my plane and now it´s better. It still drops a little at the start, but not as much, and the gear doesn´t break anymore
What I´ve changed/moved are those orange and blue arrows in OPS (I don´t know what they´re called but they seemed to have something to do with it ) so that they now point at the wheels. They were out of place before.

posted 04-26- 09:46 AM               

If you look at the properties for the base model of the aircraft you will see a obWheels property. This defines the three points where the wheels should touch the ground in relation to the main model. If these are set too high then the aircraft will drop until the actual wheels collide with the ground.

The value in the obWheel property will look something like this:

-3.28384,2.03713,-6.52089 3.2616,2.03713,-6.52089 -0.17715,-17.9973,-2.12674

which is x,y,z,x,y,z,x,y,z co-od for the three points. change the z value for all three points to start the aircraft closer to the ground. The one above is from the spit, you will notice the 1st and 2nd Z co-rd are quite high and represent the main gear while the third is relativly low and represents the tail wheel. Make these numbers closer to zero to start it closer.

posted 04-26- 12:03 PM               

I´ll try that.