Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,980 pages of information and 229,093 images on early companies, their products and the people who designed and built them.
Harper Aircraft at Exeter Airport, in Devon
A prototype was built with the intention of fitting a 122cc or 197cc Villiers three-speed engine with fan cooling and a starting motor. The glass-fibre body had a full fairing that carried twin headlights. Although development work continued for a couple of years, few machines were ever built.