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The English word helicopter is adapted from the French word hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix (ἕλιξ), genitive helikos (ἕλῐκος), "helix, spiral, whirl, convolution" [1] and pteron (πτερόν) "wing".
Most aircraft trimmed for straight-and-level flight, if flown stick-fixed, will eventually develop a tightening spiral-dive. [2] If a spiral dive is entered unintentionally, the result can be fatal. A spiral dive is not a spin; it starts, not with a stall or from torque, but with a random perturbation, increasing roll and airspeed.
Helicopters with fly-by-wire systems allow a cyclic-style controller to be mounted to the side of the pilot seat. The cyclic is used to control the main rotor in order to change the helicopter's direction of movement. In a hover, the cyclic controls the movement of the helicopter forward, back, and laterally.
The chère hélice, photographed by Nadar in 1863.. He successfully invented one of the first prototypes of a helicopter by designing his "dear propeller []" in 1861, with his friend Gabriel de La Landelle, an experimental small prototype of a "heavier-than-air []" aerostat with counter-rotating rotor with two coaxial aerial propellers, and a bicarbonate steam engine [4] [5] (whose boiler was ...
The LA Post compares the differences between the once-popular helicopter parenting and the more measured approach, hummingbird parenting, as new research reveals the downsides of the former.
The top Democrat on the Senate Commerce Committee said Thursday the United States needs to reconsider the significant military helicopter flights near one of the most congested U.S. airports after ...
Most-produced Western helicopter; nicknamed "Huey". UH-1Y derivative in production. 1959–1976 Bell 206 Jetranger: 8,460: manufactured at Bell plants in United States and Canada: Also made under licence by Agusta in Italy and Commonwealth Aircraft Corporation in Australia: 1966–2010 Eurocopter AS350: 7,000 + [1] France: Airbus Helicopters ...
WASHINGTON (Reuters) -Data retrieved from an investigation into a collision last week between an American Airlines regional passenger jet and a U.S. Army helicopter over the Potomac River in ...