i not sure 77chickenhawk
I think that figure we can come very well from two radial 5cyl ... although I admit that seeing a B-17 or B-24 with these engines is one thing ... but to think that for every engine we can spend more than the $ 5000 I believe that if I had all this money not used for that purpose ...
My other concern and the fact that these engines weigh too ... and to balance the plane to balance them against what you have that in a regular airplane balsa means the breaking of the structure
but i can all ways mistake.