US Air Force C17
by Ron Roberts
Title
US Air Force C17
Artist
Ron Roberts
Medium
Photograph - Photography
Description
US Air Force C17 Globemaster coming in for a landing.
The design of the cargo compartment allows the C-17 to The C-17 cockpit accommodates pilot, co-pilot and two observer positions. The digital avionics system has four Honeywell multifunction cathode-ray tube displays, two full-capability HUDs (head-up displays) plus cargo systems.
The quadruple-redundant electronic flight control system also has a mechanically-actuated backup system.
There are two Lockheed Martin central processing computers, one Hamilton Sundstrand data management computer and two Honeywell air data computers.
A program to upgrade the C-17A avionics includes new mission computers and displays, new software for the warning and caution system, provided by Northrop Grumman Navigation Systems. The automatic flight control system is upgraded with BAE Systems CsLEOS real-time operating system is certified for GATM (global air traffic management) system requirements.
Cargo systems on Boeing's C-17 Globemaster carry a wide range of vehicles, palleted cargo, paratroops, air-drop loads and aeromedical evacuees.
"The C-17 is capable of landing a full payload in less than 3,000ft."
The cargo compartment has a sufficiently large cross-section to transport large wheeled and tracked vehicles, tanks, helicopters (such as the AH-64 Apache), artillery and weapons such as the Patriot missile system. Three Bradley armoured vehicles comprise one deployment load on the C-17. The US Army M1A1 main battle tank can be carried with other vehicles.
The maximum payload is 170,900lb (77,519kg) with 18 pallet positions, including four on the ramp. Airdrop capabilities include: a single load of up to 60,000lb (27,216kg), sequential loads of up to 110,000lb (49,895kg), Container Delivery System (CDS) airdrop up to 40 containers, 2,350lb (1,066kg) each, up to 102 paratroops.
The aircraft is equipped for LAPES (low-altitude parachute extraction system) drops. For Medevac, the C-17 can transport up to 36 litter and 54 ambulatory patients and attendants. C-17s can take off from a 7,600ft airfield, fly 2,400nm and refuel while in flight. It can land in 3,500ft (1,064m) and 90ft-wide (27.4m) airstrip.
Countermeasure technology
AN/AAR-47 has a suite of surface-mounted thermal sensors around the aircraft, which detect the thermal signature of the missile exhaust plume. Frequency selection and signal processing techniques are used to minimise the false alarm rate.
The system provides a warning to the crew via the cockpit indicator unit of the presence and direction of the missile threat. A signal is automatically sent to the ALE-47 dispenser.
AN/ALE-47 is capable of carrying a mix of expendable countermeasures, including jammers. The system interfaces to the C-17 aircraft's sensors. The aircrew can select the mode of operation of the dispenser for fully automatic, semi-automatic or manual operation
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December 29th, 2012
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