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Old 06-07-2019, 09:26 AM   #11
Dbahnson
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This is the distance that defines the bolt hole circle:

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Old 06-15-2019, 06:29 PM   #12
tahoeheidi
 
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Here is the requested measurement (I hope!):
5 1/4 inches based on your diagram at http://woodenpropeller.com/forumvB/a...1&d=1559913957
Thank you for being so patient with me!
Heidi
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Old 06-15-2019, 06:32 PM   #13
Dbahnson
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So I think it's highly probable that it was made for a Curtiss OX5 engine. The problem comes with the fact that that engine was used on a whole range of different aircraft, so while the JN4 might have been one of them, there's usually no way to establish that fact to a buyer, for instance.
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Old 06-15-2019, 06:34 PM   #14
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Thank you so much for your time in trying to determine the origin of this particular propeller. Good enough answer - "probable". At least we know it was "probably" made for a Curtiss OX5 engine.
Best regards,
Heidi
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