Attention propeller heads!

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Hi Mike

Hi Mike

I can see the graphs OK now.

Thanks a lot for your trouble,




rick.jones's picture
Thanks everyone for all your

Thanks everyone for all your helpful responses.

Cavitation isn't something I've ever paid much attention to, so I've been reading up on it a bit, and it does sound as though tip cavitation might be part of the problem. This would result from the prop spinning too fast, and as result it would loose grip and spin faster!

I've always paid heed to the standard recommendation that the engine should be able to reach the recommended revs at WOT, and that under-revving over stresses the engine. But maybe at this kind of power/weight ratio a bit of under-revving with a higher pitch prop can be tolerated. I think that's the way to go.

Rick Jones (Treasurer) 1994 Mac 19 "White Lightning", Isle of Wight