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C-5A/B Galaxy
The C-5 Galaxy is a heavy-cargo transport designed to provide strategic airlift for deployment and supply of combat and support forces. The C-5 can carry unusually large and heavy cargo for intercontinental ranges at jet speeds. The plane can take off and land in relatively short distances and taxi on substandard surfaces during emergency operations. The C-5 and the smaller C-141B Starlifter are strategic airlift partners. Together they carry fully equipped, combat-ready troops to any area in the world on short notice and provide full field support necessary to maintain a fighting force.
Using the front and rear cargo openings, the Galaxy can be loaded and off-loaded at the same time. Both nose and rear doors open the full width and height of the cargo compartment, allowing drive-through loading and unloading of wheeled and tracked vehicles, and faster, easier loading of bulky equipment. A "kneeling" landing gear system lowers the aircraft's cargo floor to truck-bed height. The entire cargo floor has a roller system for rapid handling of palletized equipment. Thirty-six fully loaded pallets can be loaded aboard in about 90 minutes.
The Galaxy's weight is distributed on its high flotation landing gear, which has 28 wheels. The landing gear system can raise each set of wheels individually for simplified tire changes or brake maintenance.
An automatic trouble-shooting system constantly monitors more than 800 test points in the various subsystems of the C-5. The Malfunction Detection Analysis and Recording System uses a digital computer to identify malfunctions in replaceable units. Failure and trend information is recorded on magnetic tape for analysis.
Four turbofan engines mounted on pylons under the wings power the C-5. Each engine pod is nearly 27 feet (8.2 meters) long, weighs 7,900 pounds (3,555 kilograms) and has an air intake diameter of more than 8 1/2 feet (2.6 meters). The Galaxy has 12 integral wing tanks with a capacity of 51,150 gallons (194,370 liters) of fuel - enough to fill 6 1/2 regular-size railroad tank cars. The fuel weighs 322,500 pounds (145,125 kilograms) and permits the C-5, carrying a 204,904-pound (92,207-kilogram) payload, to fly 2,150 nautical miles (3,440 kilometers), off-load, and fly another 500 miles (800 kilometers) without aerial refueling.
Features unique to the C-5 include the forward cargo door (visor) and ramp and the aft cargo door system and ramp. These features allow drive-on/drive-off loading and unloading as well as loading and unloading from either end of the cargo compartment. The C-5’s kneeling capability also facilitates and expedites these operations by lowering the cargo com-partment floor by about 10 feet to 3 feet off the ground. This position lowers cargo ramps for truck bed and ground loading and reduces ramp angles for loading and unloading vehicles. The C-5’s floor does not have treadways. The “floor-bearing pressure” is the same over the entire floor. The C-5A/B can carry up to thirty-six 463L pallets. The troop compartment is located in the aircraft’s upper deck. It is self-contained with a galley, two lavatories, and 73 available passenger seats (CB at FS 1675). Another 267 airline seats may be installed on the cargo compartment floor (maximum combined total of 329 troops including air crew over water).
Except for emergencies or unusual circumstances, the C-5 does not carry troops in the lower-deck cargo compartment; but 73 seats are available in the rear compartment of the upper deck for personnel and operators of equipment being airlifted. The C-5 has carried special loads, such as large missiles, that would require extra time, manpower and dollars to transport via ship, rail or flatbed truck.
The forward upper deck accommodates a crew of six, a relief crew of seven, and eight mail or message couriers. The flight deck has work stations for the pilot, co-pilot, two flight engineers and two loadmasters. The upper deck's forward and rear compartments have galleys for food preparation, as well as lavatories.
The Galaxy has sophisticated communications equipment and a triple inertial navigation system, making it nearly self-sufficient. It can operate without using ground-based navigational aids.
The electrical system has four engine-driven generators, each powerful enough to supply the aircraft sufficient electricity. Each of the two main landing gear pods carries an auxiliary power unit to supply electric and pneumatic power for engine starts and ground air conditioning, heating, cooling and ventilation. Air turbine motors in the landing gear pods also can power the hydraulic systems and the main landing gear kneeling motors.
The Galaxy is one of the world's largest aircraft. It is almost as long as a football field and as high as a six-story building and has a cargo compartment about the size of an eight-lane bowling alley. The C-5 is the only aircraft that can transport any of the Army's combat equipment, including the 74-ton (66,600-kilogram) mobile scissors bridge, tanks and helicopters. |
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