Thanks for the information, Ed. It brought to mind a question I've had
for some time. Has anyone come up with a good indicating system for a
prop-pitch motor? Every installation I'm aware of, the ham coupled a pot
to the mast and read the position with an ohm or milliampere meter in
the shack and a piece of card board marked up with headings. Has someone
disigned an interface box to go between a prop pitch and a standard
Hy-Gain indicator, for example?
>From: Edward W. Sleight[SMTP:email@example.com]
>Sent: Wednesday, June 04, 1997 5:26 AM
>Subject: Re: [TowerTalk] Rotators
>Just a little addendum...the prop pitches also came out of just about
>every engine that GE or Pratt & Whitney ever built, not just from the
>WW2 era. All the DC series up to the DC7, the Old Constallations, just
>about any military recip built up until right now, and of course, the
>civilian versions of any multi-engine aircraft. US FARs require that
>a "means be available to rotate the propeller to a 90 degree position
>in the event that engine fails." Don't take that as an exact quote..
>The stress we put on WW2 prop pitches from the B-29, 26, 17 group is
>about the equivelent of trying to kill a dinosaur with a tennis
>And by the way, the prop pitch motors were an intergral part of the
>propeller system, not the engine, so the same engine could be used on
>a single engine aircraft or multi-engine.
>It was also used to set the RPM of the engine, so it's use was not
>just restricted to feathering it.
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