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Translational lift is improved rotor efficiency resulting from directional flight in a helicopter.Translation is the conversion from the hover to forward flight. [1]: 2–27 As undisturbed air enters the rotor system horizontally, turbulence and vortices created by hovering flight are left behind and the flow of air becomes more horizontal.
The Wingless Electromagnetic Air Vehicle (WEAV) is a heavier-than-air flight system which can self-lift, hover, and fly reliably with no moving components. The Wingless Electromagnetic Air Vehicle ( WEAV ) is a heavier than air flight system developed at the University of Florida , funded by the Air Force Office of Scientific Research .
The first Type 173 Mk 1 registered G-ALBN made its first hovering flight on 3 January 1952 but it tended to fly backwards. After landing from a second hovering flight ground resonance developed. [2] Modifications to the aircraft to correct these shortcomings delayed the first flight out of the hover, which occurred on 24 August 1952. [2]
A V-280 in flight with rotors tilted to hover configuration. The V-280 is designed for a cruising speed of 280 knots (320 mph; 520 km/h), hence the name V-280. It has a top speed of 300 knots (345 mph; 556 km/h), a range of 2,100 nautical miles (2,400 mi; 3,900 km), and an effective combat range of 500 to 800 nmi (580 to 920 mi; 930 to 1,480 km).
The R-4 was the world's first large-scale mass-produced helicopter and the first helicopter used by the United States Army Air Forces, [1] the United States Navy, the United States Coast Guard and the United Kingdom's Royal Air Force and Royal Navy. In U.S. Navy and U.S. Coast Guard service, the helicopter was known as the Sikorsky HNS-1.
A hovering helicopter is surrounded by a vortex of air pushing the helicopter down. This can be a hover in ground effect or out of ground effect. Thus, when in a hover, the engine needs to provide enough power to both counter helicopter weight as well as counter this downward flow of air into the rotor system.
Took color images while hovering at its farthest point from takeoff. [24] The Perseverance rover recorded both audio and video of Ingenuity in flight, [26] making the helicopter the first interplanetary vehicle whose sound was recorded off Earth. 5 May 7, 2021 at 19:26 [27] (Sol 76) 108.2 10 m (33 ft) 130.84 m (429.3 ft) 2 m/s (4.5 mph)
Specifically, the new helicopter, named Lama, was equipped with the Alouette III's Turbomeca Artouste turboshaft powerplant and its dynamic systems, and was furnished with a reinforced version of the Alouette II's airframe. [2] [1] On 17 March 1969, the first SA 315B, powered by an Artouste IIB engine, undertook its maiden flight. [1]