Prop Pitch

Anybody have info on prop pitch I have a 80hp rotax 912 with GSC 3 blade wood 68 inch on my 701 with low RPM 4400 is max. Wondering what degree i should use at the tip for short field takeoff and more RPM. Thanks

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Comment by Andrzej Kostkiewicz on December 12, 2014 at 5:34am

Hi 

There is explained how it should be done . 

http://www.rotax-owner.com/rotax-blog/item/9-understanding-the-grou...

It exacly corresponding with Bob 

Comment by Bob McDonald on December 10, 2014 at 9:19am

Assuming your prop is a ground adjustable pitch model. Set pitch between 10 - 12 degrees. If with the brakes set ON or the aircraft secured WOT the RPM should be between 5200 - 5300 on the ground (static run up). In flight straight & level WOT the rpm should 5600 - 5800 with the idea being that if a throttle cable breaks the engine goes WOT but does not over rev past 5800 red line. A change of 1 degree can make a 250 - 300 rpm difference. Take your time to set the prop pitch correctly.

Comment by Andrzej Kostkiewicz on December 10, 2014 at 8:48am

David 

It looks that Your prop is to havy . On ground You sholud take aprox 5200- 5300 rpm ( no less 5200 according rotax sugestions )  . At max speed You should to get 5500 - 5600  rpm this is a setup that i have on 701 rotax 80hp

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