i know nothing about df but sounds interesting.i aquired a 87 inch vampire.wings are close to that of an extra.twin boom tail.do they make edf for this size of plane and where might i go to find info.plane weighs around 8lbs dry right now.would assume i need about 15-20lbs thrust?how do you measure thrust for what plane.for instance a 60 size plane takes from a 60-90.how do you figure what engine for your plane for edf or nitro df.thanks for any help.