"That little one is quite pretty" One lady said pointing at a TBM850.
Did you get her number?
I know PW were building a very small turbine equivalent to 250 - 300 hp for Mooney!
They should have chosen a company that lives in the present, rather than in the 1950s which is where Mooney have been living since, ahem, the 1950s.
But nobody seems to have cracked the SFC issue. I was speaking to a Czech company at Farnborough with a TP engine of (vague memory) 300HP and they said their SFC is a few % worse than the RR one. It seems to be an impossible nut to crack, for now.
SFC is quite a problem, because if you reduce the range of a plane (say a TB20, for sake of argument) from 1300nm to say 600nm (this is at common GA altitudes, not at FL250 with a mask) then you haven't got a proposition even if the engine cost $50k. And if you do what everybody else has done and go pressurised, you end up with a big expensive plane which doesn't fit the common GA mission profile.