http://www.electrifly.com/motors/motors-ammo-20-30.html
well if i use the 20-30-5200 it turns a 8x3.8 prop at 8520 on 11.1 lipo's at 8.7 amps (95.7watts, v*amps)
a .15 la turns a 8x4 prop at ????
can anyone give me those numbers

the reviews (butterfly) state people flying for half a hour on 4 ounces of fuel (http://www.rcuniverse.com/product_gu...cfm?kit_id=256)
so with that knowledge shouldnt i be able to fly on a little less that half throttle(so im only pulling 43 amps), if my solar panels were doing the work?

basically what i need is the prop size/rpm numbers of a 15 la (or any other engine) and
how much throttle one needs to keep a butterfly in the air (rpm/prop size would be great)

to see if this is even possible

i doubt anyone will we able to help me much but thought id ask