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mdnanwelch7(at)hotmail.co
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 Posted: Thu Feb 18, 2010 6:09 am Post subject: Valley Engineering Big-Twin - Any one flying with one? |
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> Jimmy, correct me if my memory is wrong.
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Thom Riddle
Buffalo, NY
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
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Thom,
I'm not Jimmy, although I have done that to a few locks. If I'm not mistaken, Jimmy had
the Generac motor, with the Valley Engineering Redrive. THAT engine wasn't enough for his plane.
No one, to my knowledge (vast as it is) on the Kolb list, uses the "Big Twin", which is a VW engine cut down from 4 cylinders to just 2.
Correct me if I'm wrong, Jimmie.
Mike Welch
MkIII CX
snow-belt Missouri
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NeilsenRM(at)comcast.net
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| Posted: Thu Feb 18, 2010 7:43 am Post subject: Valley Engineering Big-Twin - Any one flying with one? |
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Mike/All
The valley Big Twin is the Generac. I talked in depth with Larry Smith at Valley last summer at Oshkosh about Jimmy's big twin installation. Larry indicated that his performance was compromised a bit by prop selection. They are working on a turbo version that should give 503 level performance.
Jimmy indicated that Valley bolted the engine directly to the engine mount without vibration dampers. I told Larry and Jimmy that I didn't think that was a good idea. I was told by someone else that Valley gets the weight down on the genrac by cutting most of the fly wheel off. I have not confirmed it.
Rick Neilsen
Redrive VW powered MKIIIC
[quote] ---
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