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HSM-51
HSM-51, the "Warlords", is the US Navy's only forward-deployed expeditionary helicopter squadron, based at Naval Air Facility Atsugi, Japan, flying MH-60R Seahawks on anti-submarine and anti-surface missions in the Western Pacific.
HTMS Chakri Naruebet
HTMS Chakri Naruebet (จักรีนฤเบศร) is the flagship and only aircraft carrier of the Royal Thai Navy, built in Spain on a Spanish design and commissioned in 1997.
Hughes H-1 Racer
The Hughes H-1 Racer, also known as the Hughes 1B, was a racing plane Howard Hughes flew to a 352 mph world landplane speed record in 1935.
Hughes H-4 Hercules
The Hughes H-4 Hercules, nicknamed the Spruce Goose, was the largest wooden aircraft ever built, a wooden flying boat that flew once in Long Beach Harbor in 1947.
Hughes Helicopters
Hughes Helicopters was an American helicopter manufacturer at Culver City, California, maker of the OH-6A Cayuse and the AH-64 Apache, acquired by McDonnell Douglas in 1984.
Hughes OH-6 Cayuse
The Hughes OH-6 Cayuse is a single-engine light observation helicopter developed by Hughes for the US Army and flown extensively as a scout in the Vietnam War.
Hughes TH-55 Osage
The Hughes TH-55 Osage, designated TH-55A, is a two-seat piston-powered training helicopter that served as the United States Army's primary helicopter trainer from 1964 to 1988, training over 60,000 pilots.
Hughes XF-11
The Hughes XF-11 was a prototype American reconnaissance aircraft built by Hughes Aircraft, whose first prototype crashed on its 1946 maiden flight, nearly killing Howard Hughes.
Hugo Junkers
Hugo Junkers was a German engineer and industrialist who built the first practical all-metal aircraft and founded a major aircraft manufacturer in Dessau, active from 1915.
Hull loss
A hull loss is an aviation accident in which an aircraft is destroyed or damaged beyond economic repair, used in safety statistics and insurance, and often an economic rather than technical judgment.
Human factors in aviation
Human factors in aviation is the application of knowledge about human abilities and limitations to aviation equipment, environments, and jobs, spanning flight operations, air traffic control, and maintenance.
Human-powered aircraft
A human-powered aircraft (HPA) is an airplane powered solely by the pilot's muscles, an extreme design with very large, very light wings flown by trained cyclists in calm air.
Human-powered airship
A human-powered airship is a lighter-than-air craft the pilot propels by pedaling or hand cranking, with buoyant gas such as helium carrying the craft's weight.
Human-powered helicopter
A human-powered helicopter is a rotary-wing aircraft that hovers using only muscle power, achieved first by Cal Poly's Da Vinci III in 1989 and won by AeroVelo's Atlas in 2013.
Human-powered ornithopter
A human-powered ornithopter is an aircraft flown by flapping wings the pilot powers; only the University of Toronto's Snowbird has achieved a recognized sustained flight, in 2010.
Humboldt Broncos bus crash
The Humboldt Broncos bus crash was a 2018 collision near Armley, Saskatchewan, in which a truck struck the junior hockey team's bus, killing 16 of 29 aboard.
Hunter Army Airfield
Hunter Army Airfield, also known as Hunter AAF, is a United States Army airfield in Savannah, Georgia, opened as an airport in 1929 and a military field since 1940.
Hunter-killer Group
A hunter-killer group is a naval task group formed to seek out and destroy enemy submarines rather than escort convoys, pairing an escort carrier with antisubmarine surface ships.
Hush kit
A hush kit is an aftermarket package of exhaust mixers and acoustic lining retrofitted to older low-bypass turbofan aircraft so they meet Stage 3 noise limits.
Hybrid Air Vehicles Airlander 10
The Airlander 10, nicknamed the Flying Bum, is a British hybrid aircraft by Hybrid Air Vehicles carrying 100 passengers or 10 tonnes of freight, with up to five days airborne and no runway needed.
Hybrid airship
A hybrid airship is a powered lighter-than-air vehicle that derives lift from both buoyant gas and aerodynamic hull shape, letting it load and unload without ballast.
Hybrid electric aircraft
A hybrid electric aircraft is an aircraft whose propulsion combines a fuel-burning engine with electric motors and onboard batteries, sitting between conventional and all-electric aircraft.
Hydrogen-powered aircraft
A hydrogen-powered aircraft, also known as a hydrogen plane, is an aircraft that burns hydrogen in gas turbines or converts it to electricity in fuel cells, emitting no carbon dioxide.
Hyperoxia
Hyperoxia is the exposure of body tissues to oxygen at a higher than normal partial pressure, which can cause oxygen toxicity affecting the nervous system and lungs.
Hypersonic flight
Hypersonic flight is flight through an atmosphere at speeds above Mach 5, where aerodynamic heating dominates design; NASA has studied it since the 1950s X-15.
Hypersonic speed
Hypersonic speed, also called hypersonic velocity, is flight through an atmosphere above Mach 5, where aerodynamic heating rather than lift or drag dominates the physics.
Hypoxia in aviation
Hypoxia in aviation is a deficiency of oxygen that impairs normal function during flight, arising when cabin pressure falls, oxygen equipment fails, or blood oxygen carriage is reduced.
HyShot
HyShot was an international scramjet flight-test program led by the University of Queensland. This program achieved the world's first flight test of supersonic combustion at Woomera in 2002.
Hyūga-class helicopter destroyer
The Hyūga-class helicopter destroyer (ひゅうが型護衛艦) is a class of two helicopter-carrying destroyers of the Japan Maritime Self-Defense Force, JS Hyūga and JS Ise, commissioned from 2009.
IAE V2500
The IAE V2500 is a high-bypass turbofan engine built by the International Aero Engines consortium, powering the Airbus A320ceo family, the McDonnell Douglas MD-90, and the Embraer C-390 Millennium.