Anyone know of a good reference from Glow engines to Electrice sizes? I was looking to build some Spad's in electric, but wasn't sure what size of electric engine I would need for it to be a park flyer.

a speed 400 parkflyer should weigh no more than around 24oz ready to fly. my rule of thumb is: .049 sportplane=speed 400 direct drive, 049 biplane= speed 400 geard 3-1, 049 cub type of plane= tall geared speed 280 (electrofly 5-1) or for a lot of power also more weight a geared speed 400. I bought a old Sterling tigermoth bipe that has a 32 or so span and fly it on a geared 280 with a 8 cell nmih 720 and fly for 30 mins. just love it. hope this helps, Mike

I built an electric spad using a motor from www.hobby-lobby.com Go to the site and type taxi in the search and then scroll down and look at the motor. Its slightly under powered for a spad 40 size so I would bump up to a little more powerful motor.

This particular plane is a down scaled debonaire (SPAD) www.spadtothebone.com with a 48" wingspan. I scaled it down because of the underpowered motor hoping that it will zip along really well. I have yet to try it because its so windy today.