I was thinking the same thing along the lines of a 3 cyl radial but i dont think it could be done as a 2 stroke.I went to--- howstuffworks.com---and put in radial engine in the search bar and looked at the working diagram.But it was a 4 stroke.Could somone use a master rod and 2 articulating rods and all 3 cyls would fire at the same time so you would still have negative pressure in the crankcase.Then use a reed carb on back of engine like ryobi.The back of ryobi would be back of engine so all ya would need is a round stock of aluminum,flatten on 3 sides,mill a simple round housing that looks like a prop hub and turn it backwards to bolt onto the case.This would hold the front bearings and seal.Maybe i could find a way to draw one up.