On Sat, 2004-01-10 at 18:31, Alan King wrote: > Tony Peden wrote: > > > > > Once the wheels are off the ground, the center of gravity is the point > > about which the aircraft rotates. It does not rotate around the aero > > center or any other point. > > Yes, been a while since I'd used the POS. It is the other way around, with a > fixed POS it's the best point to use. With no outside force fixing the point of > suspension it will shift around the CG and the CG is the best to use as reference.
No, it really isn't. The c.g. location is best computed by the FDM as it runs, since it moves in flight as fuel is burned, ordnance is dropped, etc. > > > > > > > Also, the c.g. does *not* change with pitch attitude. It's location is > > purely a function of the weight distribution within the vehicle. > > > > Wasn't saying it would actually change, only that it would translate. OK, I suppose you could argue this if you're thinking in terms of an earth fixed coordinate system. > But it > doesn't it's the other way around the CG is the reference point and the > suspending point moves around when it's free to move. The motion's all the same > relatively as always, but it's when the POS is fixed that it is the better point > of reference to work from not when it's free to move. > > > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel -- Tony Peden <[EMAIL PROTECTED]> _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
