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Tandem-rotor helicopters have the advantage of being able to hold more weight with shorter blades, since there are two sets. However, the rear rotor works in the aerodynamic shadow of the front rotor, which reduces its efficiency. This loss can be minimized by increasing the distance between the two rotor hubs, and by elevating one hub over the ...
The Chinook is a heavy-lift helicopter that is among the heaviest lifting Western helicopters. Its name, Chinook, is from the Native American Chinook people of Oregon and Washington state. The Chinook was originally designed by Vertol, which had begun work in 1957 on a new tandem-rotor helicopter, designated as the Vertol Model 107 or V-107.
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).
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The two rotors were synchronised through a shaft to prevent blade collision, allowing the aircraft to operate through only one engine in the event of an emergency. In that case, the remaining engine would automatically run up to double power to compensate. [4] Bristol attempted to market a civilian variant of the helicopter, designated the Type ...
This is a list of rotorcraft, including helicopters, autogyros, rotor kites and convertiplanes. Lists of aircraft; 0–Ah; Ai–Am; An–Az; B–Be; Bf–Bo; Br–Bz ...
All rotor power contributes to lift, and it is simpler to handle changes in the center of gravity fore-aft. However, it requires the expense of two large rotors rather than the more common one large main rotor and a much smaller tail rotor. The Boeing CH-47 Chinook is the most common tandem rotor helicopter.
A further proposed refinement of the V-16 with two 15,000 kW (20,000 hp) Soloviev D-30V (V - Vertolyotny - helicopter) turboshafts driving six bladed rotors, to transport 20,000 kg (44,000 lb) over 500 km (310 mi) or 40,000 kg (88,000 lb) over 200 km (120 mi). The Mi-12M was cancelled at the mock-up stage when the V-12 development programme was ...