David Megginson <[EMAIL PROTECTED]> said: > Jim Wilson writes: > > > There is some hesitantion on my part to speak up on this issue, as > > it certainly isn't something I know a lot about. It seems that > > from what I remember reading, at least in some aircraft, the > > autopilots that actuate the trim wheel are using it in a way > > similar to how a live pilot would. In other words the elevator is > > used to control aircraft pitch and the autotrim kicks in to releave > > the pressure on the servos that control the elevator. > > That may be true on some larger planes; on smaller planes, at least, > I'm fairly certain that the AP simply drives the electric trim.
I did a google on autotrim+autopilot and came up with the manual for the S-Tec Sys 55. It has an optional "auottrim" servo that even comes with a switch to manually turn the wheel via the motor. They support just about all the popular GA aircraft. Of course this is an add on, and doesn't indicate whether or not anything like this is widely used in some of the heavier singles or light twins or supported by other popular GA autopilot systems. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
