sizes (again..)

[HansLab]

on the risk to open up an existing thread:

I'm in the position to choose for a prop on my IV Speedster 912UL. It will be an Ivoprop Quick adjust, but: which size?
I followed the threads on this marvelous community concerning sizes of IVO IFA's, but does that go for the QA's as well?
My doubt is - should I go for the 70 or the 68"?
What do you guys fly with? Any comment highly appreciated!!

[Geowitz]

Yes, my impression is everyone goes for the ultralight high pitch(pitch range from 35" to 70") version on the 80 hp Rotax. I would personally go with the 72" long diameter as you can try it out and easily cut it down yourself with a hacksaw if it's too much prop.

From the IVOPROP instructions -

"If you wish to increase top speed or decrease cruise RPM, switch to a 2-blade prop or cut the 3-blade prop to smaller diameter using a hack saw. As long as you cut the same length piece from each blade, the prop will remain in balance. Do not cut prop to less than 48” in diameter."