Well, I was origionally running an extremeflight 22t/930 outrunner with an 11X 4.7 SF prop, pulling 16 amps at full power after 5 seconds. Hovering, at my 6500 foot elevation, was no problem, but pull-out was not "foamy" impressive, although it did pull out. That motor took a dump on me, though, and I have since put a Hacke A20-20L and 10X4.7, pulling about 17 amps. I haven't had a chance to fly it yet, but it definitely feels like more pull. If you want foamy pullout, you will likely have to sacrifice weight and go with something in the 220-250 watt range, like an A30-28 and tp2100, or equipment longevity and overprop the A20-20L with an 11X4.7.