Take a look at the "Crimson Skies" alternate reality... They have some pretty wacky planes in there too. Here is a link
Crimson Skies Universe - Crimson Skies - Featured Planes
I agree it does have a little bit of a GeeBee Air Racer feel. Love the engine, but I agree that 16 or 20 cylinders would really give it life and lift
Great start
Tinpau