"Gord Beaman" wrote in message
...
"Steve R." wrote:

The LPT is not physically connected to the compressor; only to the prop
gearbox. The pitch control unit routes oil through the Beta tube to the
prop
to set it to feather. Since the LPT isn't connected to the HPT or the
compressor, it can turn at a much slower speed. That is the reason the
engine spools up faster than the T-56 also. If you're doing a man on the
stand you apply a bit of reverse pitch because in hotel mode you still
have
some prop blast.
Steve R.


Ok, so it's 'not' a T-56 then...do you know what it is?...and
what RPM does the prop turn at in that mode?...most
interesting...
--

-Gord.

(Note: I get this whole top post/bottom post thing messed up, so forgive me
if I switch back & forth. )
The J-model has the Rolls Royce AE2100D-3 engines. The AE2100 engine is used
in the Saab 2000, C-27J and in the AE1107 configuration in the V-22 Osprey.
I do not know the prop RPM in HOTEL mode, but it is approx. 25-30% Np RPM,
where low speed ground idle is 71-73% Np RPM.
Steve R.