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2" Extension for a US41 engine

Old 08-23-2017, 12:46 PM
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Airacobra
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Default 2" Extension for a US41 engine

Can anyone point me in the right direction to find one of these. Thank you in advance!!!
Old 08-26-2017, 10:08 AM
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Maybe a website I can go to to look for such a thing
Old 08-26-2017, 12:35 PM
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Are you speaking of a propeller hub extension, or what? These are the only guys that have anything for US engines that I know of; anything else would probably have to be custom made.

www.bennettbuilt.com/shop/Engine_Accessories--BB_Engines_Mount_Q42US_41.html

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Last edited by av8tor1977; 08-26-2017 at 12:41 PM.
Old 08-26-2017, 01:31 PM
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I'm not sure that 2" of extension would be a great idea on that engine. That would place the rotational mass well in front of any main crankshaft support bearings. Can you move the whole engine ahead?
Old 08-27-2017, 12:26 PM
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Yes, if he is speaking of a prop hub/shaft extension, that was my thought as well; 2" is quite a lot.

Hardwood dowels, (round or square), from the hardware store can make good mounting spacers. On engines that do not normally mount on spacers, I sometimes make spacers out of plywood. I trace the mounting surface onto the plywood, and cut it out with a jigsaw. I then use a large hole saw to cut out the center area to save weight.

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Old 08-30-2017, 06:56 PM
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I am building a Vailly L-5 and I was trying to locate the extension that Roy suggested. He no longer sells them, and Ziroli does not make them and they suggested I check with Sierra. I have sent them several emails with no return so I will just sit and see what I can come up with.

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