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A coaxial-rotor aircraft is an aircraft whose rotors are mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotating). This rotor configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau .
The CoAX 2D/2R was originally known as the FLIP 2 (Fly In Perfection) and is a derivative of the FLIP 1, a conventional helicopter with a main and tail rotor.[1]The CoAX 2D/2R was designed to comply with the European Class 6 microlight helicopter rules, including the category's maximum takeoff weight of 450 kg (992 lb).
It is a compound helicopter with rigid coaxial rotors, powered by two Honeywell T55 turboshaft engines; it first flew on 21 March 2019. In December 2022, the U.S. Army selected the rival Bell V-280 Valor as the winner of the Future Long-Range Assault Aircraft program.
The Kamov Ka-92 is a high-speed coaxial compound helicopter design proposed by Kamov of Russia in competition with the Mil Moscow Helicopter Plant for a $1.3 billion project by the Russian government for development of a high-speed helicopter. [1] [2]
The Sikorsky Raider X (stylized in all-caps as RAIDER X) (Sikorsky S-102 [1]) is a compound helicopter concept with two coaxial rotors and a single pusher propeller, designed by the Sikorsky Aircraft division of Lockheed Martin for the United States Army Future Attack Reconnaissance Aircraft (FARA) program. The Raider X concept was announced in ...
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The company indicated that it had suspended production plans by 2012 due to lack of dealers outside Japan and put the cost of a single H-4 at ¥7,500,000.00 (about US$80,887.59 in 2013). The company stated that it could build the aircraft economically only in lots of ten and at a discounted rate only in lots of one hundred.
In January, 1949, a Hiller 360 became the first civilian helicopter to cross the United States. [ 2 ] Besides helicopters, in the year after World War II, Stanley Hiller researched a two-man rocket-jet aircraft design that took off and landed vertically, called the VJ-100 , in which he tried unsuccessfully to interest the U.S. military.