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tmhww1 07-08-2008 06:03 PM

U.S. Propellers, Inc., Los Angeles, Calif.
 
My Uncle Reginald died in 1960 and left me a beautiful wooden propeller when I was a 6 year old kid. Uncle Reg flew in WW1 and WW2. The family lore is that the propeller is from a reconnisance aircraft he flew in WW1. I know very little about him, at this time, other than this.

I would like to find out if this propeller was used on WW1 aircraft and if so, what kind of aircraft. I'd also like to figure out the history of it and its manufacture, if possible.

The info on the propeller is as follows:

On the center portion on one side is says:

US Propellers, Inc.
CONTW535AC35915
PLANE L6

On the other side it says:

DES 76FGS64
SERAF 4310542
RPM 2200
HP 115
TC 787
ENG FRANKLIN

There is a Round Decal on the body of the propeller that says: US Propeller, Inc. Los Angeles, Calif. and a central star with "US" in the middle.

Stamped on the back are the numbers:

10542
64
1
2

Thanks for any help.

Dave 07-09-2008 07:59 AM

It was designed to be used on an Interstate L6, a WW2 aircraft.

That particular model carries a note:
"Serial Nos. 10000 to 10731, inclusive, are not approved. Propellers bearing these serial numbers hav a 3 1/4" bore and eight 7/16" diameter bolt on a 5 1/4" diameter bolt circle and many of them were inadvertently stamped "T.C. 787" prioor to delivery to the Army for use on the Interestate L6 airplaned equipped with the Kinner No 8031 hub."

So it looks as if yours was not approved for use because of a manufacturing screw up, and is stamped for a Franklin engine. I think the serial number "AF43 10542", means that it was for a 1943 Air Force contract.

tmhww1 07-09-2008 12:30 PM

US Propellers, Inc., Los Angeles, Calif.
 
Thanks Dave.

Can you share your source for the info? Its much appreciated.

Tim

Dave 07-09-2008 08:57 PM

It's an FAA publication called Volume VI, Aircraft Listing and Aircraft Engine and Propeller Listing, Type Certificate Data Sheets and Specifications, January, 1983 (Page 32)

K-5 03-31-2011 12:30 PM

Prop/hub incompatible question
 
Quote:

Originally Posted by Dave (Post 2324)
It was designed to be used on an Interstate L6, a WW2 aircraft.

That particular model carries a note:
"Serial Nos. 10000 to 10731, inclusive, are not approved. Propellers bearing these serial numbers hav a 3 1/4" bore and eight 7/16" diameter bolt on a 5 1/4" diameter bolt circle and many of them were inadvertently stamped "T.C. 787" prioor to delivery to the Army for use on the Interestate L6 airplaned equipped with the Kinner No 8031 hub."

So it looks as if yours was not approved for use because of a manufacturing screw up, and is stamped for a Franklin engine. I think the serial number "AF43 10542", means that it was for a 1943 Air Force contract.

Dave, Do you know what difference in specifications makes these props incompatible with the Kinner 8031 hub? thanks, Jeff

Dave 04-04-2011 07:19 AM

For one thing, it appears that the bolt holes were drilled to 7/16" rather than the specified 3/8". The note includes the fact that the hub was drilled to 3 1/4", but they don't specify the design center bore size. The were also

K-5 04-04-2011 10:01 AM

Thanks Dave, That jives with a seller on Barnstormers in possession of one of these serial numbered props. His is drilled to 7/16ths and my Kinner hub is 3/8ths. I steered him to your information. Thanks for a great website!

BTW, I'm looking for an original propeller for my Kinner K-5 that can be used as a template for a new propeller. Something along the lines of a Kinner Sportster prop.

v/r Jeff


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