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Union two-stroke engine, 1919.

Union two-stroke engine, 1919.
4 0 c m
actual image size: 25cm x 32cm


A sectioned example of the 'Union' two-stroke air-cooled engine operating on the Clerk cycle and embodying improvements patented by R S Whaley in 1919. When fitted to a lightweight bicycle it is claimed that it could achieve 125 miles per gallon of petrol. Made by J Parkes & Sons Ltd.

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© Science Museum / Science & Society Picture Library

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