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Aviation History
1951
1951 - 1216.PDF
JUNE 1951 FLIGHT evacuated 15 men. The ease with which the craft can be disassembled for shipment, than reassembled, was shown when it was flown to Japan aboard a Douglas C-124. The H-19 will be placed in service with the Air Rescue Services this year and will undergo tests under actual operational conditions by the United States Air Force Air Materiel Com- mand and the Air Proving Ground, Meanwhile the smaller H-5 has more than demonstrated its worth by rescuing some 1700 men from front line positions or from behind enemy lines in Korea. In addition to increased military orders for the H-19, and the four-place H-18, Sikorsky Aircraft was re- cently named winner of a Marine Corps design competition for new type assault helicopter with far-reaching possibilities, HAMILTON STANDARD PREPARES FOR THE FUTURE - In the few years since V-J Day, Hamilton Standard has so developed its line of propellers that more than 90# of all U.S. Transports either are, or soon will be equipped with the Division1s Hydromatic. In addition, Hamilton Standard has pioneered the basic concept of the supersonic propel ler and is designing two types under U. S. Navy and Air Force sponsorship. Its work on development of propellers for propeller-turbine engines has also moved rapidly ahead with extensive testing of two four-bladed models and also an eight-bladed dual- rotation type. The division has broadened its activities to include other aircraft products. For example, its air-cycle refrigeration units , have been ordered for three important U.S. jet fighters— the North American F-86D Sabre, the Lockheed F-94.C all- weather interceptor, and the Chance TFought F7U Cutlass. : HAMILTON STANDARD BUILDS HUGE TURBINE PROPELLER - A 19-foot aircraft propeller, largest ever built by Hamilton Stand- ard for turbine engines, is undergoing tests by the USAF Air Materiel Command at Wright-Patterson Air Force Base. The big propeller was -developed for the Air Force for power plants of over 5,000 horsepower and has a double purpose. It can be used on the highest power piston engines now being considered and also the so-called "medium horsepower" turbines. When used in conjunction with another 19-foot propeller, with connecting mechanism, it can serve as an eight- bladed, dual-rotation model, capable of handling much greater power. The new propeller is the third of Hamilton Standard1s line of specially designed turbine propellers — called Turbo-Hydromatics — to reach the stage of Air Force or Navy testing after extensive en- durance testing by the manufacturer. Two others are being tested by the Navy, a smaller four-bladed propeller, now in the flight stage, and a dual-rotation eight-bladed version. The series incorporates experience gained in more than 2,600 hours of flight and ground testing of Hamilton Standard propellers on turbine engines in the past five years. The Turbo-Hydromatic uses an electronic control to regulate hydraulic pitch- changing mechanisms which adjust the blade angle in flight. On the ground, the pilot takes over direct control of the propeller blade angle. This permits control of the airplane1s taxiing speed, forward and backwards by changing the amount and direction of thrust. In contrast to the sisse of the new Turbo-Hydromatic are the two 3f-pound purans, each about the size of an inkwell, used to chants rapidly the pitch of the big, hollow steel blades. Requiring a total of 15 horsepower from the engine shaft to drive them the pumps are used together only for rapid pitch adjustment in the event of sudden power changes, and for feathering and reversing. Under normal con- ditions, only one pump is used for propeller operation. UNITED AIRCRAFT EXPORT CORPORATION EAST HARTFORD 8,CONNECTICUT, U. S. A. European office: 3/5 Warwich House Street, London, SWI, England
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