A collection of hot air engines

细节
A collection of hot air engines
including a gas-fired tandem cylinder rhombic drive engine with burner and disc flywheel, designed by A. Ross; a Robinson-type engine with power cylinder 1in. bore x 1in. stroke, spoked flywheel and spirit burner, aluminium casing; and a Keiko-type hot air engine driven fan -- 9in. (22.8cm.) high. (3)