was heard of the project.<ref>Steam Car Developments and Steam Aviation, June 1934</ref> 1938: A British company, Aero Turbines Limited, designed a steam turbine engine similar to Huettner's. The company ceased to exist in 1948. 1944: A steam-powered version of the Messerschmitt Me 264A Amerika Bomber was hypothesized but never constructed. It was to be powered by a steam turbine developing over while driving a -diameter propeller. The fuel would have been a mixture of powdered coal and petroleum. It seems that the steam turbines would have had an SFC of 190 gr/hp/hr. The main advantages of this powerplant were considered to be that it produced consistent power at all altitudes and required low maintenance. 1960s: Conceptual drawings were made for Don Johnson of Thermodynamic Systems Inc., Newport Beach, California, of a steam engine to be installed in a Hughes 300 helicopter. The steam engine was a compact cylindrical double-acting uniflow (similar in layout to the Dyna-Cam Aero engine), but no prototype was ever made by Controlled Steam Dynamics, Inc. Notes References The Lore of Flight, 1986, The First Powered Hops, Historical Section, pg 38. Taylor, John William Ransom [Ed.], Crescent Books, New York Air Progress magazine, July 1969; Aeronews, p. 20 Steamed Up Over Chopper Power Daily Pilot, Thursday October 9, 1969 pg. 3 Speedy Steam Engine'' by Arthur R. Vinsel External links Report on the Besler aircraft The Besler Steam Plane Flying By Steam, by David Sarlin article published in Light Steam Power Besler Corporation Promo Film: Steam-Driven Vehicles "Steam Takes Wings", December 1932, Popular Science Aircraft engines