PT-6: Prop feathered or not?

z987k said:
All of them that I flew have, but Borris alluded to having to get the manual out.
We did let one feather in itraining and put it on the locks just to see it.
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If we have a concern about rocking the van backwards on shutdown.. ie sloped ramp, heavy load and no ground crew to put the tail stand in we shut down off the locks, then run the pump before restart.
 
Boris Badenov said:
No sir, I was TRAINED PROPERLY. Ok, maybe once when I'd tried to start the thing without a powercart at like -10C, but that doesn't count. Because I say it doesn't. And lord didn't I have a fun time trying to figure out how to get it back on the locks, thumbing through the manual with thumbs I couldn't feel. I mean, theoretically.
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Unfeathering pump! I got to learn how to unfeather the -10R-511C. Getting ready for my SIC ride in the CASA.
 
Ok..heres the skinny...some applications using a pt 6 such as the Pilatus pc 12 have whats called the feather interrupt switch. They reccomend using it on shut down to mitigate sucking fod in when it feathers on the ramp. Once below 200 rpm on the shut down sequence, you release the fx interrupt switch and then it will feather.
 
Ziggyfuzz said:
Ok..heres the skinny...some applications using a pt 6 such as the Pilatus pc 12 have whats called the feather interrupt switch. They reccomend using it on shut down to mitigate sucking fod in when it feathers on the ramp. Once below 200 rpm on the shut down sequence, you release the fx interrupt switch and then it will feather.
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Couldn't you just not manually feather it like you normally do? I've let a pt6 spin down on it's own before and it takes forever as does the feathering.
 
z987k said:
Couldn't you just not manually feather it like you normally do? I've let a pt6 spin down on it's own before and it takes forever as does the feathering.
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Isn't it all in one power lever with no control of pitch?
 
ASpilot2be said:
I don't know about the five, but the other numbers indicate we have duplex nozzles, and a hartzell propeller.
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IIRC the first number is the fuel controller. There's two options, bendix and woodward, you can tell which one you have by looking at the intake, right in front of the compressor there's a difference between the temperature and pressure probe(s) for the two.
Thing about the props though is most aircraft have an STC for something different than what came with it.
 
z987k said:
IIRC the first number is the fuel controller. There's two options, bendix and woodward, you can tell which one you have by looking at the intake, right in front of the compressor there's a difference between the temperature and pressure probe(s) for the two.
Thing about the props though is most aircraft have an STC for something different than what came with it.
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Interesting. I did not know that about the fuel controller. About the prop, all I know is i read that 511c is hartzell, and 512c is dowty.
 
Boris Badenov said:
No sir, I was TRAINED PROPERLY. Ok, maybe once when I'd tried to start the thing without a powercart at like -10C, but that doesn't count. Because I say it doesn't. And lord didn't I have a fun time trying to figure out how to get it back on the locks, thumbing through the manual with thumbs I couldn't feel. I mean, theoretically.
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I never did either, but thats what the unfeathering pump is for.... AKA the dummy pump
 
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