wrote:

But where is the crossover point as dictated by the physics of turbines?

Allison makes a 420 hp unit. That's about as small as they go.

C-182? C-209? Caravan? Whoops, that last one is already a turbine.

Maule M-7.

George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to have
been looking for it.