aircraft bounce on runway

[johankotze]

When I am in take off position and change camera view my aircraft is bouncing also on approach my aircraft tilt from side to side. This never happened before.

[mrzippy]

Let some air out of your tires! Maybe a little lube on the landing gear struts. What are we talking here....Default aircraft or one you just downloaded and are trying out for the first time?

[PhantomTweak]

There is a setting in the .air file for the aircraft in question that is specifically named in the info attached to AirED.exe program for bounce on the runway. I believe it was Record 1101, Lift section, CL_q Lift, Pitch Bounce += line. That what it reads, anyway, I never tried it.

Also, I believe the 11th number following the = in the [Contact_Points] in aircraft.cfg files will affect this, in the three lines for landing gear (usually 3 lines, 2 for taildraggers, more for large commercial jets with lots of truks for landing gear), as indicated by a 1 as the first number after the = sign. Usually 0.70 to 0.90 in value does the job nicely.

Pat☺

[keefpee]

I think pitch bounce in the .air file info ( right click on subject line if using AirEd) gives it a tendency to return to previous flight state, or words similar. It sounds as if its more like the contact points amount of deflection & damping.

HTH

Keith

[ScatterbrainKid]

The only FSX aircraft I've had that bounced while standing still on the runway was a Ryan but I fixed it by painstakingly fiddling with the contact points like PhantomTweak said, but it sent me half nuts doing it.

If you don't want the hassle of doing that, delete the plane and try another freeware download of the same type.

As for rocking and rolling on approach, maybe you've flown into an invisible thermal, they can produce turbulence.

Switch them on in your display options so you can see them and check where they are.

(They look like big coiled springs)

[napamule2]

Well, since we are doing 'theory' and not actual edits to a specific airplane I would say that it COULD be the roll MOI. That would explain the 'rocking and rolling'. And the wheels would 'react' to low roll MOI by one wheel (left) lifting and then the other wheel (right) would 'mimic' the other one and you would then have 'BOUNCE' (more like tipping) but ONLY if the damping in ct pts was too low (ie: 0.300). Full damping (1.000) would help it NOT bounce, but you would then have to adjust the height of the wheel (3rd one in) as that would be affected. What to do-Trial & Error? Or just theory? Cheesh.

Chuck B

Napamule