Kronfeld MonoplaneThe Kronfeld Monoplane was a 1930s British ultra-light aircraft designed by Robert Kronfeld, only one was built.Design and developmentDesigned as a successor to the company's British [Aircraft Company Drone|Kronfeld Drone], the Monoplane was a single-seat parasol monoplane powered by a Carden-Ford converted car engine. The Monoplane, registered G-AESG, was built and first flown at Hanworth Aerodrome in 1937. With the start of the Second World War a second unfinished Monoplane and the prototype were scrapped.