David Megginson writes: > John Pitz writes: > > > Please excuse my ignorance here, I actually know very little about > > aircraft, other than they are quite expensive, both to buy and to > > learn to fly, but what entails "re-trimming the aircraft to the new > > position"? > > Trim tabs are control surfaces on control surfaces -- they change the > default position of the surface when you release the controls. Most > airplanes have elevator trim; most twins have aileron and rudder trim > as well (as do some singles).
There is also the concept of ground and air trimming which refers to a procedure that runs the flight dynamics without actually moving the aircraft and then adjusting the control inputs to balance out the forces. That way when you free the dynamics to actually move you start out in a "steady" state. This is kind of complicated magic that the aero people know how to do, but most of the rest of us don't. If the plane flips over or does other wierd things on reset, then there is probably something failing in the trim routine, or something on the flightgear side is telling the trim routine to do the wrong thing ... i.e. trim for flight when we want to be on the ground, trim for the ground, but giving the wrong ground elevation, etc. etc. Regards, Curt. -- Curtis Olson HumanFIRST Program FlightGear Project Twin Cities curt 'at' me.umn.edu curt 'at' flightgear.org Minnesota http://www.menet.umn.edu/~curt http://www.flightgear.org _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
