RE: Which engine is faster in a Magnum/Dust, Jett 50 or West 50??
where does one get a speed rated 8x10 prop ?
best I can offer is the APC 8.8x9.5 prop, clipped to 8" diameter. At least I know it can safely turn 21k. Clipped a bit, on the 60LX it will turn up like the full blade 8.8x9 noted above and unload in flight a bit too.
When you get to these rpms, GOOD wood (modified) props, carbon fiber, or the Q-500 props are all I recommend. The sport series props (any brand) are not meant for loads like this.