Figure 3 2 Heros aeolipile conceived long before the acceptance of Newtons Laws

Figure 3 2 heros aeolipile conceived long before the

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Figure 3-2. Hero's aeolipile, conceived long before the acceptance of Newton's Laws of Motion, proved that power by reaction was possible. HISTORY OF JET PROPULSION The history of mechanical jet propulsion began in 1900, when Dr. Sanford Moss submitted his masters thesis on gas turbines. Later, Dr. Moss became an engineer for the General Electric Company in England. While there, Dr. Moss had the opportunity to apply some of his concepts in the development of the turbo-supercharger. This unique supercharger consisted of a small turbine wheel that was driven by exhaust gases. The turbine was then used to drive a supercharger. Research done by Dr. Moss influenced Frank Whittle of England in the development of what became the first successful turbojet engine. Dr. Whittle was granted his first patent for the jet engine
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Turbine Engines 3-3 Figure 3-3. Dr. Frank Whittle of England patented the first turbojet engine, the Whittle W1, in 1930. Its first flight occurred in a Gloster E28/39 aircraft in 1941. in 1930 and eleven years later, his engine completed its first flight in a Gloster model E28/39 aircraft. The engine produced about one thousand pounds of thrust and propelled the aircraft at speeds over 400 miles per hour. [Figure 3-3] While Whittle was developing the gas turbine engine in England, Hans Von Ohain, a German engi- neer, designed and built a jet engine that produced 1,100 pounds of thrust. This engine was installed in the Heinkel He-178 aircraft and made a successful flight on August 27, 1939. As a result, it became recognized as the first practical flight by a jet pro- pelled aircraft. [Figure 3-4] In the United States, research in the field of jet propulsion was lagging. Most of the country's Figure 3-4. German engineer Hans Von Ohain designed and built the turbojet engine that powered the Heinkel He-178 to the world's first jet-powered flight in 1939. Figure 3-5. First flown in 1942, the Bell XP-59 was the first American jet-powered aircraft. efforts were being directed toward the development and production of high powered reciprocating engines. However, in 1941 the General Electric Company received a contract to research and develop a gas turbine engine. General Electric was chosen for this important project because of its extensive experience in building electrical generat- ing turbines and turbo-superchargers. The result was the GE-lA engine, a centrifugal-compressor type engine that produced approximately 1,650 pounds of thrust. Two of these engines were used to power the Bell XP-59 "Airacomet" which flew for the first ti