RE: B-36
hobby lobby used to have a chart of engine sizes with rpm given with certain props.from what i know of electric speed 280 will not fly this bird at the given size.i know a speed 400 with a gear reduction of 3-1 is used in a pica pt-19 kit which i also available in glow for .10-.15 size engines.i would think speed 600 direct drives might be the answer if brushed motors are what you want.i was looking at the new sig catalog and they have brushless motors about equal to a 20 glow engine but they run about 60-80 each.where speed 600 are under 20.00 some places.i am seriously considering the brushless motors cost is about the same as glow engines,might make some inquireis in the electric forum.