Design Rationale: 3 wheels, 2 front & 1 rear

I have long felt that a three wheel design has significant advantages over a four wheel design, and that putting two wheels in front with proper attention to CG would satisfactorily address the rolling tendency associated with 3 wheelers. R.Q Riley, developer of the XR-3 and other 3 wheel vehicles, has excellent articles discussing 3 wheel vehicle designs in detail, so I won't repeat that here. His web site is http://www.rqriley.com/

Three wheels also has the advantages of lighter weight and reduced mechanical complexity. Powering the vehicle through the single rear wheel gives the option of "bolting up" (sort of) an existing motorcycle frame as the drive train. This saves a great deal of build time.

Lastly, three wheel vehicles are recognized as motorcycles in many states, and this helps with licensing and insurance requirements.