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Old 04-15-2014, 04:03 PM   #2
Dave
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Join Date: Jan 2006
Location: Vermont
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Sorry for the late response.

Most of the propeller manufacturers were under various government contracts during WW1. One of them, Hartzell, promised production levels of 250 propellers a day. The American Propeller and Manufacturing Company had produced over 25,000 wooden propellers by the end of WW1.

While there were a dozen or so of the big contractors for the U.S. there were litterally over 100 other companies, mostly furniture or piano manufacturers, who manufactured some propellers for the government.

Can you post a photo of the machine you mentioned?
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