THE C-17 GLOBEMASTER III IS THE MOST FLEXIBLE MILITARY CARGO AIRCRAFT

The Boeing C-17 Globemaster III is a large military transport aircraft. It was developed for the United States Air Force (USAF) from the 1980s to the early 1990s by McDonnell Douglas.

Aside from the United States, the C-17 is in service with the United Kingdom, Australia, Canada, Qatar, United Arab Emirates, NATO Heavy Airlift Wing, India, and Kuwait.
In this video US Military News & Videos youtube channel will show about C-17 Facts: Everything You Need To Know.

The C-17 measures 174 feet long (53 meters) with a wingspan of 169 feet, 10 inches (51.75 meters). Compared to other transport/cargo aircraft in the U.S. Air Force inventory, like the C-5 and C-130, these specifications place the C-17 Globemaster III right in the middle in size.
The C-130 measures 97 feet, nine inches long with a wingspan of 38 feet, 10 inches. The C-5 – the largest of the three – measures 247 feet, 10 inches long with a wingspan of 222 feet, nine inches.
ENGINES
Four PRATT & WHITNEY F117-PW-100 turbofan engines, which are based on the commercial Pratt and Whitney PW2040 used on the Boeing 757, power a C-17 Globemaster III. Each engine is rated at 40,440 pounds of thrust and includes thrust reversers that direct the flow of air upward and forward to avoid ingestion of dust and debris. The engine weighs 7,100 pounds and measures 146.8 inches long. The inlet diameter of the engine is 78.5 inches, the maximum diameter of the engine is 84.5 inches long, it has a bypass ratio of 5.9 to 1, and a overall pressure ratio of 30.8 to 1.

The large aircraft is operated by only a crew of three. The pilot, co-pilot and loadmaster are the three positions necessary to deliver the rapid strategic delivery of troops and all types of cargo to main operating bases or directly to forward bases in the deployment area. Having a crew of three reduces manpower requirements, risk exposure and long-term operating costs. A standard crew of five are added for aeromedical evacuation missions. Medical crew, which include two flight nurses and three medical technicians, may be altered by needs of patients.

Nearly all of the Army’s air-transportable equipment such as a 69-ton M1 Abrams main battle tank, armored vehicles, trucks and trailers, as well as other cargo, is loaded onto the C-17 through a large aft ramp and door system. Additionally, the cargo floor has rollers that can be flipped from a flat floor, to accommodate wheeled or tracked vehicles, to rollerized conveyers to accommodate palletized cargo. The largest-ever refuel drop occurred recently when a C-17 dropped 120 bundles of fuel to a remote base in the Middle East.

Maximum payload capacity of the C-17 is 172,000 pounds (77,519 kilograms), and its maximum gross takeoff weight is 585,000 pounds (265,352 kilograms). A document by the U.S. General Accounting Office from 1984 stated that data provided by the Air Force and McDonnell Douglas Corporation, the C-17 contractor, show that the C-17 is designed to carry its 172,200 pound maximum cargo load an un-refueled distance of about 2,900 nautical miles. This data also show that the C-17 will be able to land in 2,370 feet with a cargo load of 170,000 pounds.

The design of the aircraft allows it to operate through small, austere airfields. High-lift wing, slats, and externally blown flaps allow the C-17 to take off and land on runways from 2,300 to 3,500 feet (1,064 meters) and only 90 feet wide (27.4 meters). Even on such narrow runways, the C-17 can turn around using a three-point star turn and its backing capability. The Air Force desribes an austere runway as, “runways are usually less than 4,000 feet long and can be as narrow as 60 feet. Payloads may be constrained by runway length and weight-bearing capacity. There is less than 100,000 square feet of ramp spaceaccessed by way of a single narrow taxiway and there are no turnaround areas at either end of the runway. Ground support and equipment are usually nonexistent.”

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