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Old 02-03-2012, 12:17 PM
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DaveInDenver DaveInDenver is offline
Hard Core 4+
Join Date: Jun 2006
Location: Larimer County
Posts: 7,094

FWIW, what Bruce is talking about is literally the propeller pitch angle motors used on vintage aircraft. After WWII the surplus market was flooded with old aircraft parts and hams use them to turn beams on top of their towers. The ones hams look for were made by Curtis from the late 1930s to the mid 1950s.

Attached a web photo of what one looks like. Powerful suckers to turns the blades on the front of a P51, so a dinky 40m yagi in New Mexican wind ain't nuthin'.

I might head up to the swap tomorrow morning, LMK if anyone else wants to go. I would not be up there very long and honestly I'm not sure if they'll cancel or not.
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"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein
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