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T6nut
03-25-2016, 11:23 PM
Help ID needed..

looking for information on what it is for.

US Propellers Inc
DES 14K7797
Sn 10015

thanks in advance for any help

take care

Jeff Wright

Dbahnson
03-26-2016, 01:25 PM
There's not much available on U.S. Propellers, and they are mostly known for a large number of drone props made during/after WW2.

I think the drawing number is actually 44K7797, which indicates it was manufactured under a 1944 military contract, and corresponds to civilian model 76FGSA, as shown on the attached scan.

Where we are left off with this manufacturer is a listing of aircraft models that used that model propeller. But look closely at the footnote #2 at the bottom of the page. It lists a sequence of serial numbers that are not approved because of a manufacturing defect. Although it refers to model 76FGS (without the "A") I suspect that it's a minor factor and that yours was likely included in the non-certificated group. In that case it's pretty clear that it was intended to be used on the Interstate L6 with the Kinner engine.

Is the bolt hole circle on yours 5 1/4" or 6"? See if it matches up with the numbers noted in footnote #2.