C-17 Globemaster III
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| C-17 Globemaster III | |
|---|---|
| Name | C-17 Globemaster III |
| Caption | A United States Air Force C-17A in flight. |
| Type | Strategic and tactical airlifter |
| National origin | United States |
| Manufacturer | McDonnell Douglas / Boeing |
| First flight | 15 September 1991 |
| Introduction | 14 July 1993 |
| Status | In service |
| Primary user | United States Air Force |
| Number built | 279 |
| Developed from | McDonnell Douglas YC-15 |
C-17 Globemaster III is a large military transport aircraft developed for the United States Air Force by McDonnell Douglas, which later merged with Boeing. Entering service in the 1990s, it was designed to fulfill both strategic and tactical airlift missions, capable of operating from austere airfields while carrying oversized cargo. The aircraft has been a cornerstone of American and allied global mobility, supporting operations from Operation Enduring Freedom to humanitarian missions worldwide.
Development and design
The C-17's origins trace to the Advanced Tactical Transport program of the 1970s, which sought a replacement for the Lockheed C-141 Starlifter. McDonnell Douglas won the development contract in 1981, with design work heavily influenced by its earlier McDonnell Douglas YC-15 prototype. Key design features include a high-wing configuration, T-tail, and four Pratt & Whitney F117-PW-100 turbofan engines, which provide exceptional short-field performance. The aircraft incorporates advanced fly-by-wire flight controls and a state-of-the-art glass cockpit to reduce crew workload. Its design emphasizes the ability to land on short, unpaved runways, a capability critical for delivering equipment like the M1 Abrams tank directly to forward areas.
Operational history
The United States Air Force's Air Mobility Command accepted the first operational C-17 in 1993 at Charleston Air Force Base. Its early operational use included support for NATO peacekeeping in Bosnia and Herzegovina during Operation Joint Endeavor. The aircraft proved indispensable during the War in Afghanistan and the Iraq War, airlifting troops and supplies from bases like Ramstein Air Base and Al Udeid Air Base. Beyond combat, the C-17 has been pivotal in global humanitarian efforts, such as disaster relief after the 2004 Indian Ocean earthquake and tsunami and the 2010 Haiti earthquake. The Royal Air Force, Royal Australian Air Force, and Indian Air Force are among key international operators that have utilized the type for similar strategic and tactical missions.
Variants
The primary production model is the C-17A, which constitutes the vast majority of the fleet. A single prototype, known as the T-1, was used for flight testing and crew training. While no major structural variants exist, several notable special mission configurations have been developed. The United States Air Force operates the C-17 in roles such as Aeromedical evacuation and as a transport for senior officials, including the President of the United States. The Boeing company proposed a commercial derivative, the BC-17X, though it did not enter production. All aircraft are fundamentally similar, with updates primarily involving avionics and systems upgrades over the production run.
Operators
The largest operator is the United States Air Force, with aircraft assigned to Air Mobility Command, Pacific Air Forces, and the Air Force Reserve Command. Key international operators include the Royal Air Force of the United Kingdom, the Royal Australian Air Force, and the Indian Air Force. Other military users are the Royal Canadian Air Force, the Qatar Emiri Air Force, the United Arab Emirates Air Force, and the Kuwait Air Force. The multinational Strategic Airlift Capability program, based at Pápa Air Base in Hungary, operates three C-17s shared by NATO members and partners including Sweden and Finland. A single aircraft is also operated by the Qatar Amiri Flight for VIP transport.
Specifications (C-17A)
The C-17A is powered by four Pratt & Whitney F117-PW-100 turbofan engines, each producing 40,440 lbf of thrust. It has a maximum payload of 170,900 pounds and can carry a typical load such as an M1 Abrams tank or three Stryker armored vehicles. The aircraft has a wingspan of 169 feet 10 inches, a length of 174 feet, and a height of 55 feet 1 inch. Its performance includes a cruise speed of approximately 450 knots, a range of 2,400 nautical miles with a full payload, and the ability to operate from runways as short as 3,500 feet. The cargo compartment is 88 feet long, 18 feet wide, and 12 feet 4 inches high.
Accidents and incidents
The C-17 has maintained a strong safety record since its introduction. The first hull loss occurred on 10 July 2010, when a United States Air Force C-17A, assigned to the 3rd Wing at Elmendorf Air Force Base, crashed during a training flight near Joint Base Elmendorf-Richardson in Alaska, resulting in the deaths of all four crew members. Another notable incident involved a Royal Australian Air Force C-17A that sustained substantial damage after a heavy landing at Amberley Air Force Base in 2018; the aircraft was later repaired. In 2021, a Qatar Emiri Air Force C-17 made an emergency landing at Hamad International Airport following an engine fire, with no fatalities reported.
Category:United States military transport aircraft Category:Boeing aircraft Category:Four-engined jet aircraft