Above link points to an interview with the inventor of a device (mis)
named the Martin Jetpack. It's powered by a 200hp V-4 engine that has to
be geared up to spin the two rotors at 11,000 rpm. It can lift 1200 lbs.
as configured. Imagine how much more it could carry with a rotary? Not
only would the engine weigh less, but the gearbox could be greatly
simplified. Cheers, JL

A 250 HP, 110 pound, all aluminum Mazda 13B P-port would be wonderful.

Paul Lamnar