I'm running a Copter-X 3250kv motor through 3S and a 5.5. x 5.2 prop on my FunJet Ultra.

That equates to about 36,000 RPM. And mine is a 'mild' setup.

A 1700kv, even on 4s, would pull somewhere around 25,000 RPM, which might be a bit light-on for FunJet.

One of the 'locals' runs his on some insane setup, and makes mine look bloody slow.

If we get some good flying conditions this weekend, I'll put the radar on his and see what sort of speeds we're really talking about...

BJ