Request help to ID propeller

[mavitym]

Recently purchased propeller of unknown provenance. Manufacturer unknown. Length 70". 6 bolt hubs. Identification # 14676. My own online searches have come up empty. Pics attached. Thanks for the help.

[Dbahnson]

It's impossible to identify without a stamped design number. There were many different models of 70 inch propellers made for a variety of aircraft and engines.

U.S Propellers manufactured several of those with counterbores under Type Certificate #859. Sensenich made several 70 inch diameter props (all of the ones listed on that page that have a prefix of "70" in the model number), but it's not clear that yours was even manufactured by Sensenich. It does show a range of aircraft and engines that used that size prop, however.

In some ways it's like finding a 16 inch automobile tire and trying to find out which car it was used on. Lots of possibilities . . .

[mavitym]

Request Help to ID propeller

The stamped number on the hub of prop is 14676.

[Dbahnson]

That's almost certainly a serial number rather than a design number. I suspect that some propellers went through production with a serial number stamped early, then got rejected in the inspection process, never got a stamped model number then was kept by an employee as a display piece. Yours is almost certainly from the 30s or later, as even in the teens almost all manufactured propellers had design numbers stamped on them, along with serial numbers.

[mavitym]

Request Help to ID propeller

OK. Thanks. The only other markings on the hub are a "1" and a "2" 180 degrees out from each other which I assume might have been position references for proper mounting/installation.

[Dbahnson]

That's correct.