tscottme wrote:
727 Control Wheel http://www.angelfire.com/il2/aphs/27wh.jpg "297"
737 Control Wheel http://www.angelfire.com/il2/aphs/37wheel.jpg "495"

Can someone tell me what the conrol on the right horn of the 727 and 737
control wheel ? In the pictures linked above I've listed the number "dialed
in" on this control. The numbers don't seem to correspond to altitude,
airspeed, heading, or transponder.

Use it for anything you want, trip number, assigned altitude. Or, not
use it at all, which a lot of us did.