Unknown Propeller... ID Help!

[staples57]

Asking the experts...

I was given an "old" wood propeller, well actually the center hub section only.
I was told that is was from a military aircraft that crashed, possibly WW1. The propeller was cut to remove the damaged portions and create a keepsake.

The following marks are all that is on it;
SER. A 24248 E
MOD. 72 F 49

The Specifications (please excuse my ignorance in terminology):
...laminated wood construction
...27 layers in total, the first layer is much thinner that the rest
...6 bolt holes
...each bolt hole is 1/2 inch in diameter
...each bolt hole is 4 inches diagonally from the opposite bolt hole
...the internal hub (hole) is 2 1/4 inches diameter
...the internal hub (hole) is 3 1/4 inches in depth
...the external size of the hub is 6 1/8 inches in diameter

I know nothing about this propeller. Any information would be greatly appreciated.

Cheers,
Brad

[Dave]

It's made for a Franklin 65 HP engine, which powered quite a few different aircraft. See this page for a list of Sensenich props with that model number. Note that the basic model is 72F, indicating a 72" prop for a Franklin engine. The "49" is the pitch in inches, and is not specifically listed on that web page but almost certainly was for that same application, perhaps even custom made. The "E" in the serial number could also indicate "experimental", rather than standard productions, although I don't know that for sure.

It was definitely not WW1 vintage, and most likely was made in the 30's or 40's.