"Elevator Trim" on 747-100
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Join Date: Oct 1999
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"Elevator Trim" on 747-100
Just found an old photo of a Polar -100 and on the center pedestal (P8) at the rear left, fwd of the aileron trim switches there is a elevator trim gauge, don't think it was functioning though.
Any Ideas on it's obvious function as there were no trim switches and I don't remember being able to trim the elevators.
Plus unrelated to elevator position indicator.
Any Ideas on it's obvious function as there were no trim switches and I don't remember being able to trim the elevators.
Plus unrelated to elevator position indicator.
Join Date: May 2001
Location: Area 52
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Pan Am aircraft had these. They were originally used in conjunction with the INS for fuel savings on long haul flights. On the INS you would select Wind/Hold and it would then show acceleration/deceleration in milli-Gs; you could then use the trim and the throttles to maintain zero elevator displacement and constant speed throughout the the flight. A poor man's PMS I guess.
