ETA was a motorcycle produced in 1921, to a design by G. E. Halliday, of Halifax, Yorkshire.
Shortly after World War I, a magazine competition was run to find a design for an 'Ideal Motorcycle'. After winning the competition, Halliday put his ideas into practice and built a 7hp machine powered by a three-cylinder sv radial engine. It was mounted across the frame, displaced 870cc / 1,007cc and was built in-unit with a three-speed gearbox, with shaft drive to the real wheel. The fuel tank was made of pressed steel and doubled as the frame backbone. Leaf springs provided suspension for the frame and front forks.
Although the ETA merited more development, it never reached full-scale manufacture.
Sources: Graces Guide
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