Lewis,
From Jeff Clew's book "The Best Twin", the following summary:
The single cylinder stationary engines were introduced after the war in 450, 540, 630, and 770cc configurations, all with a 4" stroke and many interchangeable parts. Available as direct drive or with a with a geared reduction. They were used by Broom and Wade, Kango Hammers, Trusty Tractors, and Atco. Fairly heavy in weight, but with a long working life. The 770cc was dropped in 1952, as well as the reduction drive option. About this time too the crankshaft was standardized at 2" diameter on all the remaining models. Production of all stationary engines ceased in 1957 when Westinghouse took over the factory.
-Doug
Picture of a complete engine previously posted on this Forum-
