Free Turbine vs Direct Drive
01-29-2007, 05:39 PM
#11
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Joined APC: Sep 2006
Position: Captain
Posts: 310
Originally Posted by whodis
I stand corrected about that being a limitation on the entire King Air family, but in the 1900 series there is a restriction on running the engine with the prop feathered, but I think that is mainly to protect the windows from the heat, so I guess it makes sense that the smaller versions with the engines in front of the cockpit wouldn't have the same limitation.
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01-30-2007, 06:21 AM
#12
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Joined APC: Oct 2006
Position: BE9,10,20
Posts: 124
Originally Posted by GauleyPilot
SOP per checklist when starting a King Air 200 with external power is for the props to be in feather. There is nothing in the Limitations of the POH that mentions a prohibition on having the props in feather on the ground. Nothing ever said at Flight Safety or Simcom about heat damage potential.
But you can melt/distort the side windows on the King Airs. It is more of a problem on the 90 and 100 but is still a concern with the 200. It may not be a problem that you will read about in a book but it is a known issue. Simuflite does address the issue in their training and I have personally seen it happen on a 90.
The reason for having the props in feather during an external power start is so that you dont blow away the line personell who are 4 feet behind the props.
01-30-2007, 09:03 AM
#14
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Joined APC: Oct 2006
Position: BE9,10,20
Posts: 124
Originally Posted by UPTme
Are the reverse flow engines mentioned the kind like a King Air has where the exhuast comes out from the sides of the engines at the midpoint rather than the rear?
Chicks dig beta.
Chicks dig beta.
Yes, the exhaust exits are at the forward end of the engine.
01-31-2007, 04:41 AM
#15
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Joined APC: Apr 2006
Position: BE-20, RA390
Posts: 644
Originally Posted by kerns bbo
But you can melt/distort the side windows on the King Airs. It is more of a problem on the 90 and 100 but is still a concern with the 200. It may not be a problem that you will read about in a book but it is a known issue. Simuflite does address the issue in their training and I have personally seen it happen on a 90.
The reason for having the props in feather during an external power start is so that you dont blow away the line personell who are 4 feet behind the props.
The reason for having the props in feather during an external power start is so that you dont blow away the line personell who are 4 feet behind the props.
What was the situation on the melted-windows 90? Timeframe of event, high ambient temp? etc. What are Simuflite's methods on the topic. I don't spend time in feather on the ground, but I am curious to know.
I guess I should have mentioned why the props are in feather for a ext. power start, thanks for picking that up.
Last edited by GauleyPilot; 01-31-2007 at 04:55 AM.
01-31-2007, 03:46 PM
#16
Flying Farmer
Joined APC: Jul 2006
Position: Turbo-props' and John Deere's
Posts: 3,160
Here's something I've heard, but never found results. Supposedly the TPE's on the MU-2 is quieter in an overflight vs the PT-6 in the King-Air, but no one can argue who's the loudest on the ground!!!!
02-01-2007, 09:10 AM
#17
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Joined APC: Sep 2006
Position: Captain
Posts: 310
Originally Posted by Ewfflyer
Here's something I've heard, but never found results. Supposedly the TPE's on the MU-2 is quieter in an overflight vs the PT-6 in the King-Air, but no one can argue who's the loudest on the ground!!!!
02-01-2007, 03:54 PM
#18
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Joined APC: Apr 2006
Position: BE-20, RA390
Posts: 644
Originally Posted by RedGuy
The air sounds like it's actually ripping!
02-01-2007, 04:20 PM
#19
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Joined APC: Oct 2006
Position: BE9,10,20
Posts: 124
Originally Posted by GauleyPilot
Kerns,
What was the situation on the melted-windows 90? Timeframe of event, high ambient temp? etc. What are Simuflite's methods on the topic. I don't spend time in feather on the ground, but I am curious to know.
I guess I should have mentioned why the props are in feather for a ext. power start, thanks for picking that up.
What was the situation on the melted-windows 90? Timeframe of event, high ambient temp? etc. What are Simuflite's methods on the topic. I don't spend time in feather on the ground, but I am curious to know.
I guess I should have mentioned why the props are in feather for a ext. power start, thanks for picking that up.
The 90 window that I saw was melted while a few pilots were on a summer training flight with low winds. In the ground training room at Simuflite they have many sample parts some of which have failed including a window which has distortion caused from a aircraft left for a period in feather. They simply teach you to not leave them in feather for expended periods. Personally, I dont think that it is a huge issue if they are left in feather for short peiods but with the right conditions you need to be aware of the possible problems.
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