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Dave
06-19-2014, 09:03 AM
I stumbled across an old email that describes some relevant history of the Hartzell Propeller Company, which began making propellers during WW1. I didn't realize that they stopped manufacturing them in 1964 and sold the type certificates to Sensenich. That makes original Hartzell wooden propellers at least 50 years old.

Sir,

Hartzell Propeller made 2-, 3- and 4-blade wood propellers from walnut, oak, ash, maple, and spruce between 1917 and 1964. While major production of wood propellers ended in 1946, Hartzell continued to produce a few wood propellers for large engine test clubs and service requirements until our wood propeller type certificates were sold to Sensenich in 1964. Unfortunately, at that time, many of the records were lost and the records that remain are limited.

In my search, I have not found any model numbers that match the numbers you listed.

If you have any further questions, feel free to contact me at your convenience.

Regards,

Sam Gascho
Hartzell Product Support