PT6?

[GUNIT]

Hey guys,

I'm doing a project on the PT6 for my powerplant systems class. I was wondering if I could get any insight to unique features of the PT6 from a pilot's perspective? How responsive is the engine to changes in the power levers? Performance? etc..

Thanks!

[Cessnaflyer]

Reverse flow, free turbine. Project done!

It's used in a lot of airplanes.

[OldTownPilot]

...And will run on windex and butter if need be.

Before the days of prist as an antibacterial agent in jetfuel, you would put in some 100LL in with it to kill the bacteria every once in a while.

[ricecakecm]

Originally Posted by GUNIT

Hey guys,

I'm doing a project on the PT6 for my powerplant systems class. I was wondering if I could get any insight to unique features of the PT6 from a pilot's perspective? How responsive is the engine to changes in the power levers? Performance? etc..

Thanks!

The engine has a slight lag in power changes due to the free turbine design.

With regards to performance, there are several different dash number PT-6's out there. I've flown -20 (500HP), -21 (550HP), -60A (1050HP), -67B's (1200HP). The lower dash numbers tend to temp out a lot quicker, especially in the summer.

Good engine, easy to run, damned near bullet-proof.

http://en.wikipedia.org/wiki/Pratt_&_Whitney_Canada_PT6 has a lot of good info.

[Minuteman]

Here's a link to the PT6's FAA Type Certificate (90.3kB PDF). That should at least provide some basic numbers and a list of all variants.

[DoWhat?]

. . . . Will try to answer any direct questions you have. Well, regarding the -67D anyway.

[Doug Taylor]

Originally Posted by GUNIT

Hey guys,

I'm doing a project on the PT6 for my powerplant systems class. I was wondering if I could get any insight to unique features of the PT6 from a pilot's perspective? How responsive is the engine to changes in the power levers? Performance? etc..

Thanks!

Actually initially created to run oil rigs and then later modified to create an aircraft powerplant.

Legend says at least.

MEGA reliable.

[t-cart]

I have operated a PT6-15, PT6-34, and the PT6-60. All of them were great engines. Very expensive to a small operator. The last one I bought was the -60 and the engine was $355,000! That was in 1998, I am sure they are around $450,000 by now. That being said, The first P&W Turbine that I owned was the -15. Took the old P&W radial off and stuck the turbine on. Increased the production on the same airframe by around 75%. Lots less "downtime" with the turbine. Pretty economical to operate. Really not much as far as maintanance, just cleaned the nozzles and filters every 100 hrs., nozzles, filters,and compressor wash every 300 hrs. Hot section about every 1500-1800 hrs. I think the P&W turbines are some of the finest engines ever built. If I were to go back in business tomorrow, A P&W would be on the nose of whatever airframe I bought.

[GUNIT]

hey guys,

thanks a ton for the info! I have some really good info on the PT6 family and this is the icing on the cake.


Would you consider it a double reverse airflow? First intake air is ducted to the back of the engine and then the flow is reversed yet again going into the annular combustion chamber.
Thoughts?

[minitour]

Suck, squeeze, bang, blow.

[BajtheJino]

Originally Posted by GUNIT

hey guys,

thanks a ton for the info! I have some really good info on the PT6 family and this is the icing on the cake.


Would you consider it a double reverse airflow? First intake air is ducted to the back of the engine and then the flow is reversed yet again going into the annular combustion chamber.
Thoughts?

Double? I think you're selling yourself short (or not). I'm trying to remember exactly but on the -114a the flow reverses itself something like 7 times.

[OldTownPilot]

Originally Posted by GUNIT

hey guys,

thanks a ton for the info! I have some really good info on the PT6 family and this is the icing on the cake.


Would you consider it a double reverse airflow? First intake air is ducted to the back of the engine and then the flow is reversed yet again going into the annular combustion chamber.
Thoughts?

No. Reverse flow means the general flow goes from back to front.

Local flow is a whole 'nother ball game.

To expand on the free turbine, Its a free "low pressure turbine" or "power turbine" The high pressure turbine drives the compressors, and therefore must be connected.

[ppragman]

Its the greatest thing since sliced bread. Tiny bit of a power lag, but its reliable, iceproof, powerful, and has great reverse for short strips. I love the things.