Credit to the design of this 1930's car to SuperTT.
I decided to make this a 2030's car with a shiny Ivory paint job.

Driving mode: Throttle, brake and roll to drive.
Flying mode: VTOL slider up at least to the 3/4 mark.
Use pitch and roll to fly.
Trim up activates the afterburner.
Full speed above 250 MPH causes slow turns, while slower speeds allow faster turns.
Boating mode: When you go into the water rest your fingers and grab a drink, then just pitch your nose down and takeoff again. (VTOL and Afterburner disable on level water.)
The fuel tank is filled with energy supplied from the high efficiency solar panels (MOD is not necessary to functioning of vehicle, it just helps).
Have fun.