The largest aircraft propeller ever used is the Gruda (Cam&) propeller, with a diameter of 6.9 meters. It is installed on a Linke-Hofinann RII aircraft built in Woclaw, Poland. The aircraft first flew in 1919. The propeller is driven by four 260-horsepower (194-kilowatt) Mercedes engines, which rotate at 545 rpm. The earliest jet flight
The idea of ??jet propulsion dates back to the end of the 19th century. The idea was proposed by France's Marconi (Mamonnet) and Romania's Henri Coanda. In 1921, Maxhne Gufl-laume proposed the idea of ??a turbojet engine. The earliest jet test was conducted in April 1937 at the British Jet Engine Co., Ltd. The inventor was Frank Whittle (born June 1, 1907). For this purpose, he applied for patented.
The earliest turbojet aircraft was a He-178 aircraft manufactured by Heinkel Aircraft Factory. On August 27, 1939, Flug Kapitan Erich Warsitz piloted this aircraft for its first flight in Marinech, Germany. The aircraft is equipped with a Heinkel S-3b axial flow turbojet engine (weighs 378.30 kilograms with the jet tail pipe installed), and the designer is Dr. Hans.