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Old 11-19-2017, 02:36 PM   #2
Bob Gardner
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Join Date: Jan 2006
Location: The North of England
Posts: 1,665

Dashwood Lang was the owner of the British Lang Propeller Co. When the USA eventually entered WW1 in 1917, the USN asked HMG in September 1917 to send an expert to advise on propeller design and the massed production of props. They sent Lang. He formed the Lang Propeller Company of America and introduced a separate nomenclature for US prop drawing numbers.

Your prop carries British prop data and was probably made in Britain and shipped to the States where Lang applied his American decal.

So, your prop must date from the first few weeks of Lang's time in America; perhaps October to December 1917. It is probably the only example likely to survive. The prop was made for the SE5A aircraft designed by the Royal Aircraft Factory in England and carries their drawing number T 28137. The diameter is shown as 2.514m.

With kind regards,

Bob Gardner
Author; WW1 British Propellers, WWI German Propellers
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