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Old 08-13-2014, 10:14 PM   #1
Firemancg
 
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Default Uniteds states Aero Propeller Co?

I came across a propeller that has this logo and numbers on it? Help please
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Old 08-13-2014, 10:18 PM   #2
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Default Numbers

Dia. 8'4"
S.C. 42931
1121
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Old 08-14-2014, 10:25 AM   #3
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"S.C." is a Signal Corps number, but it will not identify it as to type etc.

About all you can do is check the hub dimensions to find the most likely engine it was designed for, which looks like it's probably an OX5.
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Old 08-14-2014, 01:46 PM   #4
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Thanks Dave, it's in really good condition you can tell it had been in a plane and flown. Has the wind burn and the copper is compressed on the outside edge from wind force. Any idea to the value if this item?
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Old 08-14-2014, 03:08 PM   #5
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Not without seeing it.
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Old 08-14-2014, 04:55 PM   #6
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So Dave, is there any information you can give me or point me in to find out about United States Aero Co? I can't find any information on them.
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Old 08-14-2014, 05:47 PM   #7
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I don't have anything on them, except that there were two addresses listed, one in Milwaukee. I compiled this list when I was researching WW1 era propellers years ago at the National Archives, and all of these companies had written letters at one point to the Navy or U.S Air Service to offer manufacturing services.

I don't know what you mean by wind burn and compression of the copper from wind force.
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Old 08-14-2014, 06:31 PM   #8
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The wind burn or heat from friction causing the prop to hear up
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Old 08-14-2014, 06:33 PM   #9
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The ripples in the copper from the force cutting the air.
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Old 08-14-2014, 07:07 PM   #10
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The changes in the varnish are caused by the atmospheric changes over time in storage, not heat from usage (which doesn't occur with wooden props anyway), and the damage on the copper is from it hitting something, which may or may not have occurred during use, but the leading edge is the part that usually gets damaged. It's not caused by wind.

(By the way, please don't try to "repair" either of those. It will dramatically decrease the value of the item.)
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