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Old 01-02-2018, 12:38 PM   #2
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Join Date: Nov 2008
Posts: 912

The numbers do not appear to be standard for any certificated aircraft, and a 5 foot diameter is shorter than any standard propeller that I know of. It will probably be hard to identify, and may be an ultralight or some other type of prop. A few pictures might help narrow it down, but at this point there are just too many possibilities.
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