Lockheed C-17 Globemaster III

Lockheed C-17 Globemaster III
Name	C-17 Globemaster III
Type	Strategic/tactical airlifter
National origin	United States
Manufacturer	McDonnell Douglas / Boeing Defense, Space & Security
First flight	15 September 1991
Introduction	14 July 1993
Status	In service
Primary user	United States Air Force
More users	Royal Air Force, Royal Australian Air Force, Indian Air Force
Number built	279

Lockheed C-17 Globemaster III is a large military transport aircraft developed for the United States Air Force (USAF) by McDonnell Douglas, which later merged with Boeing. It was designed to perform strategic airlift missions, delivering troops and cargo directly into austere, forward-operating bases around the world. The aircraft entered service in 1993 and has since become a critical component of global military and humanitarian logistics, known for its ability to operate from short, rough airfields.

Development and origins

The C-17's development originated from the USAF's CX program in the late 1970s, which sought a replacement for the aging Lockheed C-141 Starlifter. McDonnell Douglas won the development contract in 1981, with the aircraft initially designated the YC-15. The program faced significant cost overruns and technical challenges during the 1980s, leading to congressional scrutiny and near-cancellation. A critical review under the Cheney Department of Defense in 1990 reaffirmed the program's necessity, and the first production model, built in Long Beach, California, flew in 1991. The merger of McDonnell Douglas and Boeing in 1997 transferred production and support to Boeing Defense, Space & Security.

Design and features

The aircraft features a high-wing, T-tail design with four Pratt & Whitney F117 turbofan engines, derived from the commercial Pratt & Whitney PW2000. Its design emphasizes short takeoff and landing (STOL) capability, enabled by externally blown flaps that use engine exhaust to increase lift. The rear ramp allows for rapid loading of a wide range of cargo, including the M1 Abrams main battle tank, MIM-104 Patriot missile systems, and humanitarian supplies. The cockpit is equipped with a digital glass cockpit and head-up display for a two-person crew, and the aircraft incorporates advanced defensive systems like the AN/ALR-56M radar warning receiver.

Operational history

Entering service with the 437th Airlift Wing at Charleston Air Force Base, the C-17 quickly proved its worth. It saw extensive use during Operation Joint Endeavor in Bosnia and Herzegovina and later in Operation Enduring Freedom in Afghanistan and Operation Iraqi Freedom. Beyond combat missions, it has been pivotal in global humanitarian and disaster relief efforts, such as after the 2004 Indian Ocean earthquake and tsunami and the 2010 Haiti earthquake. The USAF fleet achieved 3 million flight hours in 2015, demonstrating exceptional reliability. The final aircraft for the USAF was delivered in 2013, concluding production in 2015 after building aircraft for international partners.

Operators

The primary operator is the United States Air Force, with aircraft assigned to Air Mobility Command, the Air Force Reserve Command, and the Air National Guard. Key international operators include the Royal Air Force, which operates them from RAF Brize Norton; the Royal Australian Air Force; the Canadian Armed Forces; the Qatar Emiri Air Force; the United Arab Emirates Air Force; the Indian Air Force; and the Kuwait Air Force. NATO also operates a small fleet through the Heavy Airlift Wing based in Hungary.

Specifications (C-17A)

* **Crew:** 3 (2 pilots, 1 loadmaster) * **Length:** 174 ft (53 m) * **Wingspan:** 169 ft 10 in (51.77 m) * **Height:** 55 ft 1 in (16.79 m) * **Empty weight:** 282,500 lb (128,100 kg) * **Max takeoff weight:** 585,000 lb (265,350 kg) * **Powerplant:** 4 × Pratt & Whitney F117-PW-100 turbofans * **Maximum speed:** Mach 0.74 (500 kn, 920 km/h) * **Range:** 2,420 nmi (2,785 mi, 4,482 km) with 160,000 lb (72,600 kg) payload * **Service ceiling:** 45,000 ft (13,716 m) * **Capacity:** 102 paratroopers or 134 troops; 170,900 lb (77,519 kg) of cargo

Accidents and incidents

The C-17 has an excellent safety record with very few hull-loss accidents. A notable incident occurred in 2010 when a USAF C-17 from the 3rd Wing crashed during a training mission at Elmendorf Air Force Base in Alaska, resulting in four fatalities. In 2023, a Royal Australian Air Force C-17 sustained significant damage after overshooting the runway at Amberley Air Force Base in Queensland; there were no fatalities. Other incidents have involved minor ground accidents, such as a 2016 event at Bagram Airfield in Afghanistan.

Category:Military transport aircraft of the United States Category:McDonnell Douglas aircraft Category:Boeing aircraft Category:Four-engined jet aircraft