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This is an accepted version of this page This is the latest accepted revision, reviewed on 12 February 2025. Classified advertisements website Craigslist Inc. Logo used since 1995 Screenshot of the main page on January 26, 2008 Type of business Private Type of site Classifieds, forums Available in English, French, German, Dutch, Spanish, Italian, Portuguese Founded 1995 ; 30 years ago (1995 ...
The Javelin used a 40 hp (30 kW) motorcycle engine, and was the forerunner of RotorWay's first production helicopter, the Scorpion, which was offered in 1967. [6] The Scorpion, priced at $6,300 (not including the cost of the engine), was the first real kit helicopter on the market that flew.
Sikorsky CH-53E Super Stallion (S-80) and Sikorsky MH-53E Sea Dragon, a heavier helicopter introduced in 1981, developed from the CH-53 Sea Stallion by adding a third engine, a seventh blade to the main rotor and canting the tail rotor 20 degrees. The MH-53E Sea Dragon is used for long range mine sweeping or airborne mine countermeasures.
Arizona Helicopters Inc was a helicopter contractor which operated in Laos in the early 1970s for the Central Intelligence Agency. [ citation needed ] Arizona Helicopters was originally based out of Chandler Municipal Airport in Chandler, Arizona and then in 1968 was moved to Scottsdale Airport in Scottsdale, Arizona .
An example of two-blade rotor is the Bell 212, and four blade version of this helicopter is the Bell 412. [23] An example of the effect of rotor blade number is the UH-72 ( EC145 variant ); the A model had four blades, but the UH-72B was changed to five blades which reduced vibration. [ 24 ]
A blade inspection method is the practice of monitoring the condition of a blade, such as a helicopter's rotor blade, for deterioration or damage. A common area of focus in the aviation industry has been the detection of cracking, which is commonly associated with fatigue. Automated blade condition monitoring technology has been developed for ...
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However "pitch links" on the blades transmit the pitch information way ahead of the blade's actual position, giving the blades time to "fly up" or "fly down" to reach the desired position. That is, to tilt the helicopter forward, the difference of lift around the blades should be maximum along the left-right plane, creating a torque that, due ...