IVO InFlight Adjustable

[av8rps]

I use a low pitch 68 inch diameter 3 blade IVO IFA on my 912ul 81 hp Kitfox 4 on amphib floats and love it (except for the stainless leading edge tape that doesnt last. If I didn't fly water I would just use 3m rocker panel plastic tape and throw away the stainless tape).

The higher pitch blade (which I've tried for the first 50 hours on my plane) would not allow me to get full rpm/full power when pitched as flat as it will go (wouldn't even get me 5200), and at the top end I learned that the 912ul doesn't have the power to utilize all the pitch the blade is capable of. So in effect, much of the built in blade pitch is wasted.

The low pitch blade however will actually allow you to overspeed at low pitch (so use the supplied pitch stop washers to avoid overspeeding your engine), but is just right at full pitch (WOT at full pitch on a cool day will get me to 5400-5500 rpm on a 68 inch 3 blade), and therefore will provide a significant increase in cruise speed..

If I weren't flying on floats the higher pitch blade would be ok, but I'd rather have the blade that allows me to use full rpm on takeoff and climb.

That's my two cents on that subject...hopefully that helps answer your question.

Paul Seehafer