Well done Lightning Mate
Got it! The Northrop Turbodyne V,
The XT-37 Turbodyne was developed by the Northrop-Hendy Company, a jointly-owned subsidiary with the Joshua Hendy Iron Works. Research on the turbine that resulted in the Turbodyne dated back to 1939, when Vladimir Pavlecka, then Northrop's chief of research, interested Jack Northrop in the potential of gas turbine power plants. Funded by a joint Army-Navy contract, the turbine development continued during the war years, and the first engine was completed in 1945. It was subsequently destroyed during tests, but a second machine continued in development. By 1950 its 50-hour endurance test was completed, delivering a record-breaking 7500 hp continuously. At the time, it was the most powerful aircraft power plant in the world, capable of delivering 10,000 hp with a suitable propeller. On the EB-35B, two Turbodynes were to drive large counter-rotating pusher propellers. With the cancellation of the EB-35B in 1949, prospects for flight tests of the engine ended. In 1950, at the direction of the Secretary of the Air Force, the patents, name, and technical data were released to the General Electric Company.[/quote]