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Object Record

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Object Name Airplane, Military
Catalog Number 2015.41.01
Description Propeller of WWI bomber engine (Liberty 12 Engine on the de Haviland Airco DH4 bomber). de Haviland bomber designed in 1916. Approximately 3200 of this model made in U.S.
Propeller manufactured by American Propeller Manufacturing Company. Company founded in Washington D.C. in 1909 under the name Paragon, but moved to Baltimore in 1912. Used solid oak construction. AMPC was largest manufacturer of wooden aircraft propellers in U.S. by 1918.
"American Propeller/ Trademark PARAGON / Baltimore, Maryland, USA" faintly imprinted on blade. Numbers stamped into both left and right side of hub; one the left side, "S.C. 67214," and on the right side, "9 5 6 7 5 / RIGHT HAND."
Measurements: 112" length, 11" diameter at the hub. 8 1/2" holes on 8" diameter bolt circle, 3 1/8" diameter center hole, and 7 5/16" thickness of hub.
Source Schnepfe, Robert and Dennis