Rick wrote:

wrote:

What aircraft would use that setup Rick? I can't imagine how you
could drive a prop directly from a turbine engine with no
reduction gearing? (or did I misread you?)

I think you misread. A turboshaft engine can be used for
anything but driving a propeller directly. They are used to
power everything from generators and air compressors to
ships and water pumps. Some of them, like the GE LM2500
drive the output shaft directly from the power turbine at
3600 rpm so they can be direct coupled to a generator. They
do not use a gearbox.

Rick

Ok, that makes sense as far as it goes...I'm a little surprised
at the low speed of that turbine though but then, I'm used to
aircraft turbines that rotate much faster, could be something to
do with weight requirements though. The other part of your post
seems to say that you 'can' drive a prop directly and that's what
I was querying actually. Most aircraft turbines driving props
rotate at 13,000 - 14,000 RPM and that's much too fast for props
so you need reduction gearing.
--

-Gord.