The wingspan is going to be 80".. I am thinking of a DLE/AGM 30cc engine.. I am not familiar with airplanes with the power pods on top of the wing, this is a first for me with a gasser on top of the wing. I have had gliders with electric motors on top but this is a totally different animal and hope the gas engine will not vibrate or stress the wing center since I plan on making the wings detachable.