"Bret Ludwig" wrote in message There are two basic "families" of PT6
engines ....
Most twins are not really safe to to do
that with considering the dismal single engine performance and lack of
single lever power control (which coupled with their 1950s panels means
they desperately need a F/O or F/E in the right seat).

Apples to oranges- most twins equipped with PT-6s have decent single-engine
performance, and decent safety records.

The former Allison 250 series of engines is also a fair powerplant
especially in the Soloy remote redrive configuration with less fuel
burn, less weight, but is not so elegant or simple.

The C-250 series never caught on for fixed wing applications. There must be
a reason (says the former NOMAD N-22 driver).

The Garrett 331 is
a piece of ****, but if cheap enough I'd rather fly behind one of those
than a Lycoming, and its noise would rally the troops on the front of a
mini-warbird or aerobatic biplane, wouldn't it?

Fighting words to me. I have 5000 hours behind -331s. They are dependable
and have lower BSFCs compared to PT-6s.

D.