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 Post subject: Cool Engine
PostPosted: Sat Dec 24, 2011 10:16 am 
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Joined: Fri Jul 15, 2005 2:34 pm
Posts: 6872
Location: Within 60 Miles of the Northern Anthracite Field
i didnt know alco made airplane engines.......


http://www.youtube.com/watch?v=kQZOc49e ... ata_player


sure sounds like one!

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 Post subject: Re: Cool Engine
PostPosted: Sat Dec 24, 2011 4:20 pm 
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Joined: Tue Sep 16, 2008 6:51 pm
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Location: SW Indiana
So do they lock the props in the feathered position? I would think even at idle that trailer wouldn't hold.

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 Post subject: Re: Cool Engine
PostPosted: Sat Dec 24, 2011 11:55 pm 
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Location: Within 60 Miles of the Northern Anthracite Field
thats a test stand prop. its about half the diameter of an acutal flight prop, but twice the pitch to throw cooling air over the engine. half the diameter, twice the pitch puts the same load on the engine, that way it thinks its a flight prop. we have a few of these at work for running in engines........

heres a cool solid works model of how it works.....

http://www.youtube.com/watch?v=_vrvep_Y ... ata_player

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 Post subject: Re: Cool Engine
PostPosted: Sun Dec 25, 2011 2:32 pm 
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Joined: Tue Sep 16, 2008 6:51 pm
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Location: SW Indiana
Sleeve Valves - That in an interesting concept.

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 Post subject: Re: Cool Engine
PostPosted: Sat Jan 07, 2012 1:36 am 
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Joined: Thu Mar 19, 2009 4:33 pm
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Location: Dunmore, PA
I like the animation, isn't amazing what we were capable of before computers and CNC equipment. Chris, why does the starter turn for awhile before the output shaft starts to turn?

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 Post subject: Re: Cool Engine
PostPosted: Sat Jan 07, 2012 7:13 am 
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Joined: Fri Jul 15, 2005 2:34 pm
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Location: Within 60 Miles of the Northern Anthracite Field
its an inertia starter, the compression is so big on those radials because of so many cylinders its very difficult to turn over. its spinning up a big flywheel and when its up to speed it engages the crankshaft.

heres a hand crank one:
http://www.youtube.com/watch?v=WkPFRpbSU9o

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