ORIGINAL: 80sPattern
My scorpion is GREAT. Absolutely no issues. It is the perfect motor for this plane. For earlier, smaller designs, such as the P-7 the smaller 4020-8 is a great motor on 5s.
Doug
aka Fatherof4
As Doug puts it, the Scorpion S-4020-8 (790KV) on 5s is the Scorpion SPA choice for 1400W of power (80A/5s max). It won't get the ballistic blistering speed performance you guys down under are looking for but it is light and well suited to SPA. For CPA on smaller retract designs, the HKIII 4025-890KV motor I mentioned above ought to be interesting to try.
The Rimfire 60 being a 650KV unit, is that much better on 6s than say the E-Flite 60 which is a 400KV unit.
Greg, the Hyperion you mention sounds like it is right in the correct geometry and
elasticity for 11x9 props at ~11.5K and ~1500W. I'd up the KV a tad if you want better performance on 11" props. By the way, they're made by Scorpion...
David