Helicopters

A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally-spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (Vertical TakeOff and Landing) aircraft cannot perform. 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) "helix, spiral, whirl, convolution" and pteron (πτερόν) "wing". English language nicknames for …

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Publications

WHO: World Health Organization · 25 November 2024 English

ix, 43 p.

restricts them to large-acreage areas. Crewed helicopters can spray larger areas, and because of their AGDISP™ model is applicable only for single-rotor helicopters and fixed-wing aircraft and is not validated aircraft and 75 percent of the rotor diameter for helicopters. There is currently no recommendation relating or 80 percent of the main rotor diameter for helicopters, although some configurations, such as for forest


Cato Institute · 22 November 2024 English

In October 2024, Congress received notification of two new arms sales for Taiwan, and the Ministry of National Defense (MND) confirmed the final delivery of Javelin anti-tank missiles. The net …

missiles against aerial drones, cruise missiles, helicopters, and fixed- wing aircraft. The United States


EU: European Union · 22 November 2024 English

This report contains the annual summary of the fire season of 2023 with official figures provided by 34 contributing countries for the number of fires, burnt areas and fire prevention …

response capacities, 13 firefighting planes and helicopters from the collective rescEU fleet were quickly such as extinguishing containers for use in helicopters and auxiliary equipment for use in alpine areas units and specialised units). Aerial resources (helicopters, planes) are provided by the Ministry of the medium type firefighting helicopters. In addition, light type helicopters were available for use as national assets composed of 5 aircrafts and 6 helicopters, the rescEU module from Greece composed of 2


Bruegel · 21 November 2024 English

This lack of shared strategic interest will obviously affect the work of the new defence commissioner and of the High Representative of the Union for Foreign Affairs and Security Policy. …

some military equipment, such as aircraft or helicopters (Draghi, 2024) and investment in defence R&D


UN: The United Nations · 21 November 2024 English

18 p.

day. But it continues to use fighter jets and helicopters to conduct aerial attacks on civilian areas


EU: European Union · 20 November 2024 English

TRIMIS provides periodical assessments of transport innovation capacity through a macro-level indicators analysis at EU level. This report presents an updated review of the overall innovation capacity, including indications on …

B63J AUXILIARIES ON VESSELS B64C AEROPLANES; HELICOPTERS B64D EQUIPMENT FOR FITTING IN OR TO AIRCRAFT;


SIGAR: Office of the Special Inspector General for Afghanistan Reconstruction · 20 November 2024 English

Lessons learned reports such as this one comply with SIGAR’s legislative mandate to provide independent and objective leadership and recommendations to promote economy, efficiency, and effectiveness; prevent and detect waste, …

an area so dangerous that armed U.S. military helicopters could not even land nearby.156 26 | INTERAGENCY


World Bank Group · 19 November 2024 English

The principles of sovereignty, equality, and self-determination - which have long been the basis for nonintervention in the affairs of sovereign states - have more recently been widened to condemn …

for sustenance – the state sent coast guard helicopters to examine the conditions on the island without beyond patrolling the island with coast guard helicopters to actually providing relief items, including


Heritage Foundation · 19 November 2024 English

In 2016, the Permanent Court of Arbitration in The Hague ruled in favor of the Philippines in this dispute, stating that the majority of the shoals belonged to the Phil- …

effective against low-altitude air threats, such as helicopters or low-flying aircraft. SHORAD systems include


UN: The United Nations · 15 November 2024

20 p.

armoured combat vehicles, combat aircraft, helicopters, large-calibre artillery systems, missile systems


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