"Gord Beaman" wrote in message
...
"Kevin Brooks" wrote:


"Abe" wrote in message
.. .
In article ,
says...

"Abe" wrote in message
...
In article dGKKb.8616$6l1.5192@okepread03, says...
Would a helicopter count as a turboprop? Turbo-blade? :-)

Helo engines are usually referred to as "turboshaft", which aside
from
sounding suspiciously like a porn film, is possibly just another
name
for a turboprop.

I wonder what the V-22 engines are. Turboprop when facing forward,
turboshaft when facing upward?

Isn't the presence of a transmission in the latter what helps
delineate
it
from the former?

Turboprops have transmissions also, I'm sure. At least, you'd need to
put some gearing between engine and props.

Some gearing yes; but I don't think they have anything as complex as the
transmissions employed on helos. Just a guess, though.

Brooks

Yes, that's roughly correct AFIK. I know turboprops but not
Helicopters and I'd think that helicopters would require much
more complicated transmissions. Turboprops aren't very
complicated, just quite rugged, about 10 to 1 or so reduction
planetary gear-train with a 'torsion bar' type of driveshaft to
measure torque and some method of preventing the prop from
driving the engine (

Thanks. I don't know squat about turboprops, but I do know that helo
transmissions are typically pretty complex and are a rather common source of
maintenance trouble, not to mention being one of the more vulnerable spots
in terms of combat damage.

Brooks

--

-Gord.