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Along with the Alouette III, the Cheetah was a key product for HAL; experience from manufacturing the type aided in the later development of more advanced indigenous helicopters such as the HAL Dhruv. [5] During the 1990s, HAL developed an armed light attack helicopter based upon the Cheetah, which was given the name Lancer. [6] [7]
The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."
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The American Helicopter Society (AHS) International's Igor I. Sikorsky Human Powered Helicopter Competition was a competition to achieve the first human-powered helicopter flight to reach an altitude of 3 m (10 ft) during a flight lasting at least 60 seconds, while remaining within a 10 m (32.8 ft) x 10 m (32.8 ft) square, and complying with other competition requirements. [1]
The AW189 is a medium-sized twin-engined helicopter with a five-bladed fully articulated main rotor, a four-bladed tail rotor and a retractable tricycle landing gear.It is powered by two General Electric CT7-2E1 turboshaft engines.
IAR 330M – modernized variant with NATO-compatible avionics derived from the SOCAT model, 12 IAR 330Ls rebuilt as such between 2005 and 2008. [1] IAR 330L SOCAT – attack helicopter, total of 25 produced during the early to mid 2000s. [1] IAR 330 NAVAL – naval helicopter. 3 built between 2005 and 2008, with further trials and upgrades up ...
The Boeing Vertol YUH-61 (company designation Model 179) was a twin turbine-engined, medium-lift, military assault/utility helicopter.The YUH-61 was the runner-up in the United States Army Utility Tactical Transport Aircraft System (UTTAS) competition in the early 1970s to replace the Bell UH-1 Iroquois helicopter.
Twelve companies took part in the competition and Hughes Tool Company's Aircraft Division submitted the Model 369. Two designs, those submitted by Fairchild-Hiller and Bell , were selected as finalists by the Army-Navy design competition board, but the Army later included the helicopter from Hughes as well.