I've been using the 22x20's and the 9.89:1 gearset with Thunder Power 65C G6 packs and a Hacker C50-14XL, and for windy days with 90 degree cross wind (like at Chicago this last weekend ..) the speed is pretty good, but on one flight I flew quite a ways out with really big maneuvers, and I ran out of battery when setting up for landing, and I had to come in deadstick.

When I charged my pack, I put more than 4800 mah back into the packs, so this setup works, but it pushes your packs to the limit. However, I think I would have probably been fine with the new Thunder Power 25C packs, and I'm going to get a set of these and see how they work. By way of reference, I flew my other rounds with 85% ATV, and I was putting about 4100 mah back into the packs, and the speed was still fine.

Brenner ...