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In the mid-1980s, the U.S. Army sought an economical helicopter to simulate the sound and radar signature of the Soviet Mil Mi-24 during exercises. OHA sold the Army fifteen modified S-55/Mi-24 s with a new five-bladed rotor system, which was quieter than the original three-bladed rotor and made the aircraft sound similar to an Mi-24.
Noise-generating aircraft propeller. Aircraft noise is noise pollution produced by an aircraft or its components, whether on the ground while parked such as auxiliary power units, while taxiing, on run-up from propeller and jet exhaust, during takeoff, underneath and lateral to departure and arrival paths, over-flying while en route, or during landing.
The CH-53 Sea Stallion (Sikorsky S-65) is a family of American heavy-lift transport helicopters designed and built by the American manufacturer Sikorsky Aircraft.The Sea Stallion was originally developed in response to a request from the United States Navy's Bureau of Naval Weapons made in March 1962 for a replacement for the Sikorsky CH-37 Mojave helicopters flown by the United States Marine ...
Originally a Sikorsky Aircraft product, the type certificate and manufacturing rights were purchased from them by Erickson Air-Crane in 1992. Since that time, Erickson Air-Crane has become the manufacturer and world's largest operator of S-64 Aircranes and has made over 1,350 changes to the airframe, instrumentation, and payload capabilities of the helicopter.
Urban Aeronautics Ltd. patented its design as Fancraft. [2] Fancraft technologies had registered 37 patents, with 12 additional patents pending in 2013. [3]Metro Skyways Ltd. (MSL), a subsidiary of Urban Aeronautics Ltd., led in developing the X-Hawk and exercises exclusive license of manned air-taxi (civil), air-rescue, and medical evacuation markets.
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The look of the modifications was designed by Andrew Probert, [13] and they were first applied to the non-flying mock-up (built from the body of the very first Bell 222, serial number 47001). [14] From this mock-up molds were made so that parts could be made to FAA specifications before they were added to the flying helicopter. After the maiden ...
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