40 H.P. Darracq 4-cylinder horizontal aero engine, 1909. 40 H.P. Darracq 4-cylinder horizontal aero engine 1909
Two-cylinder opposed Avro Aero engine, complete with airscrew, manufactured by A.V. Roe & Co., patented by Maurice and William Edwards, 1910. Believed to have originated from Lillian Bland's Mayfly aircraft. Two-cylinder opposed Avro Aero engine, with airscrew 1911
Model of a horizontal stationary steam engine, scale 1:4, of a type made in sizes up to 185 hp by R. Hornsby & Sons, Grantham, 1885. Horizontal Steam Engine scale model 1885