A rotary radial would be just the ticket. Find one on u tube. Itl blow your mind.
Crazy engine design but that's what they came with. Only seen one modeled. I have a seven cyl radial on this BUSA neuport 28. Looks close to the original if you don't know the difference.
. Builder / owner had a watt can on it too.
Electric motors start easy, but they have no soul.
Look much nicer with a round engine that breaths FIRE.
Or a Saito 180 maybe. Love them Saitos!