C5a Aircraft

C5a Aircraft - The C-5B is capable of carrying a maximum payload up to 118,387kg to a range of 5,526km, which can be extended by in-flight refueling. The heavy logistic transport aircraft is of cantilever high-wing monoplane design with a fail-safe semi-monocoque aluminum alloy fuselage.

In February 2009, the USAF awarded two contracts worth $324m for the C-5M Super Galaxy program. The first contract is $299m worth of RERP production for nine aircraft, while the second contract is $25m worth of interim contractor support (ICS) for familiarization and operational test and evaluation of the Super Galaxy.

C5a Aircraft

The C-5 is distinct for having both front and rear cargo ramps, allowing for much faster load and offload operations. Other features of the C-5 include its ability to operate on runways 6,000 feet long (1,829 meters);

Landing Gear

five landing gear totaling 28 wheels to distribute the weight and a "kneeling" landing gear system that permits lowering the parked aircraft to facilitate drive-on/drive-off vehicle loading and adjusts the cargo floor to standard truck-bed height.

The C-5 also has the distinctive high T-tail, 25-degree wing sweep, and four turbofan engines mounted on pylons beneath the wings. The CF6-80-C2 engine produces more than 50,000lb of thrust, a 22% increase over the TF39 engines and is Stage III noise compliant.

It is also fitted to commercial airliners such as the Boeing 767 and Airbus A310. The new engine with a FADEC III control system received US Federal Aviation Administration certification in September 2004. The four-wheeled nosegear is equipped with robust hydraulically driven ball screw units to retract rearward.

The nosegear is steerable through a 120º frontal arc, giving a ground turning radius of 22.10m about the nosewheel and 52.12m about the wingtip. The C-5 is fitted with retractable tricycle-type landing gear. The landing gear is fitted with Bendix oleo-pneumatic dual-chamber shock absorbers, Goodrich wheels, carbon disc brakes and modulated anti-skid units supplied by Hydro-Aire.

C-M Super Galaxy

The Goodrich tires can be deflated in flight to suit the landing conditions at the destination airfield. There are four main landing gear units fitted in tandem pairs. Each of the four main units has a six-wheel bogie with two wheels forward and four wheels rear of the shock absorber.

The main units are rotated through 90° for inward retraction by a hydraulically-driven gear system. The first flight of the upgraded aircraft took place in December 2002. A production contract for the first eight kits was issued in April 2003 and for the next 18 in January 2004. The first was delivered in October 2004, and installation had been completed on 42

of the 112 USAF C-5A/B aircraft by September 2008. The aircraft has 12 integral fuel tanks installed between the front and back spars in the wings. The total fuel capacity is 193,624l. There are four refueling points, with two installed in the forward section of each main landing gear pods.

The US Air Force initiated a comprehensive upgrade program to ensure the capability of the C-5 fleet to at least 2040. The first phase of the upgrade is the avionics modernization program (AMP). The second phase, the C-5 reliability enhancement and re-engineering program (RERP) is to upgrade the aircraft's engines and pylons, as well as to improve reliability.

C- Avionics Modernisation Programme Amp

First flight of the C-5M, the designation given to aircraft upgraded under RERP and AMP, took place in June 2006. The second of three C-5M test aircraft made its first flight in November 2006 and the third (a modernized C-5A

) in March 2007. The first of three test aircraft was delivered to the USAF for operational test and evaluation in December 2008 and the remainder were delivered in February 2009. In 1999 Lockheed Martin Aeronautics-Marietta was awarded a contract under the US Air Force AMP.

The contract is for the integration of new systems, which include: digital flight control system, seven 6in x 8in flat panel liquid crystal displays, 12-channel embedded global positioning system / inertial navigation system, multimode receivers for the communications suite that add Aero-

1 satellite communications and HF datalink, TCAS (traffic alert and collision avoidance system) and enhanced ground proximity warning system. The C-5 Galaxy was replaced by its upgraded version, the C-5 Super Galaxy, which featured a digital cockpit, commercial turbofan engines and improved systems.

Lower Deck

Also, the ICAO designator C5 was removed from ICAO Doc 8643 and a new one, C5M was added. One of the largest aircraft in the world, the C-5 Galaxy is the primary lift aircraft in the U.S.

military for moving oversized cargo to global theaters of operation. The newest C-5M Super Galaxy has the capability to lift two M1 Abrams tanks and can transport nearly a company of troops and gear anywhere in the world with aerial refueling.

Developed in the 1960s to replace the C-133 Cargomaster and to compliment the smaller C-141 Starlifter, the C-5 Galaxy experienced a rocky design phase, plagued with wing cracks that delayed deployment of the aircraft until 1970. The latest C-5M

Super Galaxy is designed with modern avionics and flight instruments and is set to remain in service through 2040. After the completion of the changes, Lockheed Martin and the Air Force carried out operational check flights of the C-5M.

The redelivery of the first production of C-5M was in 2010 to Dover Air Force Base. Loading of the aircraft can be carried out by a straight-in loading into the front hold via the visor-type upward hinged nose and loading ramp under the flight deck.

There is also a rear loading ramp which forms the underside of the rear fuselage. For ground loading and unloading the side panels of the rear fuselage are hinged for outward opening to provide wider access.

The side panels and ramp are supplied by Canadair Limited. The aircraft is capable of transporting a maximum payload of 118,387kg. It is capable of carrying two Abrams main battle tanks, an Abrams tank plus two Bradley armored fighting vehicles, 10 LAV light armored vehicles, six Apache attack helicopters or 36 standard pallets type 463L.

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