[MetroMPG]

Originally Posted by Ptero

Borrowed froim DoinTime at the Yamaha R1 Forum
Drag Coefficient/Aerodynamics of Cars Versus Bikes : Yamaha R1 Forum

I think if you plug the numbers into the aero/rolling resistance calculator, you'll find the motorcycle example they used will have less total drag than your 3-wheeler (mostly due to its higher Cd than the car example they used).

Anyway, it's academic. You've decided this is your project.