I had a brain storm today on a roadable aircraft.
It is always in the back of my feeble mind :)

I realized one of the unique features of the rotary
is its very simple e-shaft. If one makes it longer and
larger in diameter on the front end  one can get power out of both
ends. One end is mated to a stock VW transmission and the
other end uses one of Ken Welters 3:1 cog belt reduction drives.

You take off in first gear and get much better acceleration to
flying speed. This is due to the traction you get out of tires
as opposed to a highly slipping prop. As soon as you run out of
RPM in first you push in the clutch and shift into neutral.
the prop takes over.

For road work you remove the canard and main wings
and tow them behind you. The only drawback here is the weight
of the VW gear box and drive shafts.

Its a motor cycle on the ground as that circumvents a load of
EPA and DOT rules.

Paul Lamar

And how do you disengage the prop when you are motorcycling?

Terry Adams

Unbolt it. Carry a torque wrench. Wood prop need re torquing from
time to time anyway.

Paul Lamar