On Tue, 26 Feb 2002 12:29:35 -0500, David Megginson <[EMAIL PROTECTED]> wrote in message <[EMAIL PROTECTED]>:
> Alex Perry writes: > > > The position of the elevator is a force balance, consisting of the > > aero force on the elevator, the aero force on the tab and the > > muscle force on the yoke. > > I'm still not entirely certain that I understand. I know that you > don't think in terms of absolute yoke position when you're flying, any > more than I think in terms of absolute steering-wheel or gas-pedal > position when I'm driving, but perhaps you can verify that this is > right: if I hold the yoke in *exactly* the same position and move the > trim wheel, the elevator surface will not move; only the amount of > force required to hold the yoke in position will change. Is that > right? ..yes. The force changes because will help you, or not, holding the elevator in that exact position. ..also try to think of the trim tab as an "servo rudder". Here, 'you control the rudder', not the plane. ..several (creative) pilots has been able to land airliners without hydraulic fluid in their control systems, using trim tab systems as servo rudders (and asymmetric power too), to save their own and passengers bacon. -- ..med vennlig hilsen = with Kind Regards from Arnt... ;-) Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
