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Zenith-List Digest: Prop Pitch

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goodings(at)yorku.ca
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Posted: Wed Feb 22, 2006 7:17 am Post subject: Zenith-List Digest: Prop Pitch

On my Zodiac 601HD (not XL), with GSC 68 inch 3-blade prop on a Rotax

912S, I have set blade pitch at 18.75 degrees at 75% from hub centre (i.e.

25.5 inches).  This gives 5800 RPM at full power, and a climb rate on a

cool day greater than 1500 feet per minute.  Cruise at 5200 RPM is 105 MPH

(because of that thick wing!).  When the engine is hot at full power, it

will go slightly above 5800 RPM; this is not a problem, because one just

throttles back a hair so as not to exceed 5800 RPM.  Thus, in your case, I

would start at 19 degrees.  When I get around to it, I intend to change my

pitch to 19.5 degrees.



John Goodings, C-FGPJ, CH601HD with R912S, Waterloo and Toronto.

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