There is a rule of thumb for electric powered fixed wing models that says something like:
50 watts/lb.......barely flyable
100 watts/lb.....sport flyer performance
150 watts/lb......really high performance.

In general autogyros require more power per pound than fixed wing aircraft due largely to
the greater drag that the rotor induces.

So does anyone have a thought on how much power per pound (or perhaps rotor diameter) that
should be used for autogyros: barely flyable, sport performance...etc.

BillF
Waiting for the snow in Wisconsin