Quote:
Originally posted by Neal:
AFAICT you can't have one without the other, but you can have the other without the one... torque does not always mean precession.....
Exactly right Neal! \:\)

Quote:
Originally posted by Neal:
What did those WWI planes do for trim?
Well pitch "trim" was accomplished by changing the horizontal stabilizer's angle of incidence by means of a cockpit wheel connected thru cables to a vertical "screw", or by a pilot lever connected by cables to a series of stabilizer pivot links.

Here's two examples, the first being for the Sopwith Triplane (typical Sopwith mechanism):



The second showing the Biff's mechanism (Bristol F.2B):



(hey, just tryin' to keep the thread on the front page......for Copterdrvr) ;\)