David Megginson wrote: > Maik Justus wrote: > > > Also the rolling tendency in translational lift is missing. > > > > That is a very complicate thing. Allways if I think about I run into > > confusion. > > Is it just a gyroscopic effect?
If I'm not misunderstanding the terminology, this is the rolling moment due to airspeed along the plane of the rotor. One side is moving faster than the other, and produces more force. But like everything with the rotor, it does involve gyro effects. Outside of plain aerodynamic forces, none of the forces or moments on a helicopter act on the rigid body of the airframe. They all cause the rotors to tilt or flap (or even bend, if you really are into modelling this stuff), which *then* causes (and feels) a force/moment on the body. And since the rotor is spinning, it produces all sorts of non-intuitive behavior like the 90� precession phase shift (try to roll it left, it tilts forward, etc...). It's ugly. :) Andy _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
