Turbo prop question

I was channel surfing the other day and caught the tail end of some show
about rich people and their planes. Anyway the pilot of this one single
engine turbo prop said there was no mechanical connection between the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there were 4
seats in the passenger area, and it was pretty roomy. The only other
distinctive thing I can remember is it had a fairly large cargo door
with a power assist to close it because it was so far over head when it
was open.



--
Chris W
KE5GIX

"Protect your digital freedom and privacy, eliminate DRM,
learn more at http://www.defectivebydesign.org/what_is_drm"

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Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there were 4
seats in the passenger area, and it was pretty roomy. The only other
distinctive thing I can remember is it had a fairly large cargo door
with a power assist to close it because it was so far over head when
it
was open.




It's a free turbine. Most modern turboprops use that system. There's a
seperate turbine that runs the prop geabox. He's technically incorrect
since that turbine is part of the engine...


Bertie

Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there were 4
seats in the passenger area, and it was pretty roomy. The only other
distinctive thing I can remember is it had a fairly large cargo door
with a power assist to close it because it was so far over head when
it
was open.




It's a free turbine. Most modern turboprops use that system. There's a
seperate turbine that runs the prop geabox. He's technically incorrect
since that turbine is part of the engine...


Bertie


Rich people. More money than brains.

On 25 Apr, 11:53, Frank Olson
wrote:
Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of some
show
about rich people and their planes. *Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between the
prop and engine. *How can that be?

It's a free turbine. Most modern turboprops use that system. There's a
seperate turbine that runs the prop geabox. He's technically incorrect
since that turbine is part of the engine...

Bertie

Rich people. *More money than brains.- Hide quoted text -


I'm not in disagreement with Bertie, wouldn't dare, but it
"could be" electric drive, hydraulic drive.

These are used in other vehicles. Most cars in the US
use an automatic transmission that includes a
torque convertor for example.

I am sure that it is in this case a free turbine - gas drive -
that connects to a propellor - gas-gas drive.

http://www.gasgas.com/index.shtml


http://www.britannica.com/eb/topic-1...c-transmission
http://en.wikipedia.org/wiki/Diesel-electric

http://www.fpweb.com/200/FPE/Hydraul...450/Hydraulics

wrote in news:de5298d4-778b-475f-9321-
:

On 25 Apr, 11:53, Frank Olson
wrote:
Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of
some
show
about rich people and their planes. *Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between
the
prop and engine. *How can that be?

It's a free turbine. Most modern turboprops use that system.
There's a
seperate turbine that runs the prop geabox. He's technically
incorrect
since that turbine is part of the engine...

Bertie

Rich people. *More money than brains.- Hide quoted text -


I'm not in disagreement with Bertie, wouldn't dare, but it
"could be" electric drive, hydraulic drive.



Nah, not on a turbine.

These are used in other vehicles. Most cars in the US
use an automatic transmission that includes a
torque convertor for example.

I am sure that it is in this case a free turbine - gas drive -
that connects to a propellor - gas-gas drive.

http://www.gasgas.com/index.shtml



Yeah, almost all modern turboprops use this system. Some of the older
ones, like the RR Dart or the Allisons were gear driven off the main
turbine, but this is all but abandoned these days. In fact, even "jets"
are really just ducted fan turboprops with the fan driven by a turbine
in the exhaust.


Bertie

On Apr 25, 4:37 am, Bertie the Bunyip wrote:
wrote in news:de5298d4-778b-475f-9321-
:





On 25 Apr, 11:53, Frank Olson
wrote:
Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of
some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between
the
prop and engine. How can that be?

It's a free turbine. Most modern turboprops use that system.
There's a
seperate turbine that runs the prop geabox. He's technically
incorrect
since that turbine is part of the engine...

Bertie

Rich people. More money than brains.- Hide quoted text -

I'm not in disagreement with Bertie, wouldn't dare, but it
"could be" electric drive, hydraulic drive.

Nah, not on a turbine.

These are used in other vehicles. Most cars in the US
use an automatic transmission that includes a
torque convertor for example.

I am sure that it is in this case a free turbine - gas drive -
that connects to a propellor - gas-gas drive.

http://www.gasgas.com/index.shtml

Yeah, almost all modern turboprops use this system. Some of the older
ones, like the RR Dart or the Allisons were gear driven off the main
turbine, but this is all but abandoned these days. In fact, even "jets"
are really just ducted fan turboprops with the fan driven by a turbine
in the exhaust.

Bertie

The Garrett TPE 331 is still a fixed turboprop. Lots of those
flying, especially on some upscale kitplanes. Isn't the Swearingen
Merlin powered by those, too?
http://www.aircraftenginedesign.com/pictures/TPE331.gif

Dan

Frank Olson wrote in
news:0ShQj.90501$rd2.26964@pd7urf3no:

Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between
the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there were
4
seats in the passenger area, and it was pretty roomy. The only
other
distinctive thing I can remember is it had a fairly large cargo door
with a power assist to close it because it was so far over head
when
it
was open.




It's a free turbine. Most modern turboprops use that system. There's
a
seperate turbine that runs the prop geabox. He's technically
incorrect
since that turbine is part of the engine...


Bertie


Rich people. More money than brains.


Well, what he maenas is the prop isn;t connected to the main drive of
the engine. You can actually stop the prop on a free turbine while the
engine is running and it will run just fine. He's not wrong but he's not
right if you know what I mean.

Bertie

"Bertie the Bunyip" wrote in message
.. .
Frank Olson wrote in
news:0ShQj.90501$rd2.26964@pd7urf3no:

Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between
the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there were
4
seats in the passenger area, and it was pretty roomy. The only
other
distinctive thing I can remember is it had a fairly large cargo door
with a power assist to close it because it was so far over head
when
it
was open.




It's a free turbine. Most modern turboprops use that system. There's
a
seperate turbine that runs the prop geabox. He's technically
incorrect
since that turbine is part of the engine...


Bertie


Rich people. More money than brains.


Well, what he maenas is the prop isn;t connected to the main drive of
the engine. You can actually stop the prop on a free turbine while the
engine is running and it will run just fine. He's not wrong but he's not
right if you know what I mean.

Bertie

Wannnboi, you don't know what you maena.

"Maxwell" luv2^fly99@cox.^net wrote in news:%5kQj.67977$y05.64004
@newsfe22.lga:


"Bertie the Bunyip" wrote in message
.. .
Frank Olson wrote in
news:0ShQj.90501$rd2.26964@pd7urf3no:

Bertie the Bunyip wrote:
Chris W wrote in news:74gQj.67968$y05.19485
@newsfe22.lga:

I was channel surfing the other day and caught the tail end of
some
show
about rich people and their planes. Anyway the pilot of this one
single
engine turbo prop said there was no mechanical connection between
the
prop and engine. How can that be?


I didn't catch the name of the plane. but as I remember, there
were
4
seats in the passenger area, and it was pretty roomy. The only
other
distinctive thing I can remember is it had a fairly large cargo
door
with a power assist to close it because it was so far over head
when
it
was open.




It's a free turbine. Most modern turboprops use that system.
There's
a
seperate turbine that runs the prop geabox. He's technically
incorrect
since that turbine is part of the engine...


Bertie


Rich people. More money than brains.


Well, what he maenas is the prop isn;t connected to the main drive of
the engine. You can actually stop the prop on a free turbine while
the
engine is running and it will run just fine. He's not wrong but he's
not
right if you know what I mean.

Bertie

Wannnboi, you don't know what you maena.



snort!


Bertie

On Apr 25, 3:26*am, Bertie the Bunyip wrote:
Frank Olson wrote innews:0ShQj.90501$rd2.26964@pd7urf3no:

He's not wrong but he's not
right if you know what I mean.

Yes, we all lived through the Clinton years, we know that it depends
on the definition of "it" and not wrong but not right, etc.

-Robert