On Montag, 26. April 2004 11:49, Arnt Karlsen wrote:
> > What you describe here will most likely not happen with someting only
> > velocity dependent.
>
> ..no? ;-) No velocity, plane is parked. Wee pushes, to exite the
> resonance. IME, the wee pushes straight aft gets the the plane
> dancing quite a bit, try it. ;-)
Sorry, I do not have an aircraft ...
:(
But I can well imagine.
> > Keep it in your head and try to move your aircraft around its nose
>
> ..not around the nose, around the nose wheel, usually around a point
> somewhere between the nose wheel and the mains.
Sorry, this is what I meant.
By doing what you explained the vehicle will twist around its longitudinal
axis. This will mostly not change the weight force on the nose wheel. So this
one will stay fixed. What changes is the weight force on the other two wheels
which will loose static friction for a short time. And when you apply a
little side force during this time the aircraft will move. The nose wheel is
fixed by static friction, thus the ac moves around the nosewheel ...
The more I think about that, the more I can imagine that even that is in the
Pacejka formula. Not with the real physical reason, but I can well imagine
that it will just behave like that ...
I am not shure how big the influence of the gear strut dynamics is in this
case...
Let's see ...
I have to push this stuff I have now to Jon first ...
Greetings
Mathias
--
Mathias Fr�hlich, email: [EMAIL PROTECTED]
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