The CH-47D Chinook helicopter carries out transportation of troops, artillery, supplies and equipment to the battlefield.
Other roles include medical evacuation, aircraft recovery, parachute drop, search and rescue, disaster relief, fire-fighting and heavy construction. 163 CH-47Ds took part in Operations Desert Shield and Desert Storm.
Over 1,000 Chinooks are operational worldwide. Boeing has delivered more than 480 CH-47D Chinooks to the US Army and National Guard.
Boeing has also exported the helicopter to military and commercial operators in Argentina, Australia, Canada, Japan, Norway, Spain, the UK and three Far East countries.
Chinooks are under licensed production by Agusta of Italy and Kawasaki in Japan. Chinooks built by Agusta have been exported to Egypt, Greece, Iran, Libya and Morocco.
"Over 1,000 Chinooks are operational worldwide."Upgrades and orders
397 of the US Army CH-47D helicopters are being upgraded to CH-47F standard. The LRIP contract for seven systems was signed in January 2003. Deliveries began in July 2004 and will conclude in 2018.
In December 2003, the US Army ordered seven new CH-46F helicopters to replace those lost in action and, in January 2005, an additional ten new-build CH-47F helicopters. Deliveries began in June 2006 and are scheduled to complete in 2008. In January 2007, the US Army ordered 16 new and nine remanufactured CH-47F with options on 22 new and 19 remanufactured helicopters.
The CH-46F was approved for full-rate production and entered operational service in August 2007. In February 2008, the US Army ordered another 11 new-build helicopters, bringing the number of new CH-47F ordered to 59.
In August 2008, Boeing received a five-year contract from the US Army for 191 CH-47F helicopters, 109 new-build and 72 remanufactured.
US Army special operations forces also operate 36 special operations Chinooks, designated as MH-47D and MH-47E. These aircraft are being upgraded to MH-47G standard with a fully integrated digital common avionics architecture system (CAAS). The first was delivered in May 2004.
In November 2006, a version of the MH-47G, the HH-47, was selected for the USAF combat search and rescue (CSAR-X) requirement for 141 new helicopters to replace the HH-60G Pave Hawk helicopters. However, in March 2007, the USAF announced that, following General Accounting Office (GAO) recommendations, it would issue a request for the resubmission of the CSAR-X proposals. In October 2007, the USAF decided to re-open the contest and issued new request for proposals and a contract award was expected in 2008. In December 2008, the USAF again restarted the competition but did not specify a date for contract award.
The CSAR helicopters are primarily to be used for rescuing downed aircrew and isolated troops in combat areas but may also be used for civilian rescue operations such as disaster relief. CSAR-X is scheduled to achieve initial operating capability (IOC) in 2014. Boeing's team includes BAE Systems (digital flight control system), Keystone Helicopter (patient treatment area) and Kaman Aerospace (refueling probe).
"The latest international model is the
CH-47SD."In September 2006, the Netherlands requested the foreign military sale of up to nine CH-47F helicopters with the common avionics architecture system and the upgrade of 11 CH-47D helicopters to CH-47F configuration, including the CAAS cockpit. An order for six new helicopters was placed in February 2007. Deliveries are planned for 2009–2010.
In April 2008, Canada requested the sale of six used CH-47D helicopters from the US for short-term deployment to Afghanistan. The first was delivered in November 2008. Also in April 2008, Canada issued a request for proposal to Boeing for the longer term procurement of 16 medium-to-heavy lift (MHLH) Chinook helicopters.
CH-47F
The CH-47F design features alterations to the airframe structure to reduce the effects of vibration, as well as other structural enhancements the cockpit, cabin, aft section, pylon and ramp.
The Rockwell Collins digital cockpit is fitted with the common avionics architecture system (CAAS) with improved electrical, avionics and communication systems. CAAS includes: five multi-function displays, moving map display; digital modem; BAE Systems digital advanced flight control system (DAFCS); data transfer system storing preflight and mission data.
The more powerful Honeywell T55-GA-714A engines are fitted with FADEC (full authority digital engine control) and have thrust of 3,529kW (4,733shp). The operating range is increased to 609km (329nm) with mission radius of 370.4km (200nm).
Cockpit
The cockpit accommodates two pilots and an observer. An advanced digital cockpit has been developed by Boeing and Honeywell. The cockpit is equipped with multifunction liquid crystal displays and electronic flight instruments. The crew is equipped with ANVIS-7 night-vision goggles from Elbit and the cockpit is night-vision-goggle (NVG) compatible.
The communications suite includes jam resistant HF and UHF radio systems developed and supplied by Rockwell Collins and Raytheon. The helicopter is equipped with an AN/APX-100 identification friend or foe (IFF) interrogator from AlliedSignal.
Weapons
"The engine provides a continuous power of 3,000shp and maximum power of 3,750shp."Three machine guns can be mounted on the helicopter: two in the crew door on the starboard side and one window-mounted on the port side.
Countermeasures
The Chinook is equipped with a suite of countermeasures systems selected by the customer country. The special forces variant of the Chinook, MH-47E, is fitted with the ATK AN/AAR-47 missile approach warner, Northrop Grumman ALQ-162 Shadowbox jammer, ITT ALQ-136(V) pulse jammer, Raytheon APR-39A radar warner and BAE Systems Integrated Defense Solutions (formerly Tracor) M-130 chaff and flare dispenser.
The helicopter is equipped with a Rockwell Collins CP1516-ASQ target hand-off system. Australian Chinooks are being fitted with EADS AN/AAR-60 MILDS missile warning system.
Sensors
The MH-47E is equipped with an advanced radar system, the Raytheon AN/APQ-174A, for terrain-following flight, air-to-ground ranging and ground mapping. A Raytheon AN/AAQ-16 forward-looking infrared (FLIR) is installed in the nose of the helicopter and the cockpit is fitted with a moving map display.
Cargo systems
The Chinook has a triple-hook system, which provides stability to large external loads or the capacity for multiple external loads. Large external loads such as 155mm howitzers can be transported at speeds up to 260km/h using the triple-hook load configuration.
Multiple external loads can be delivered to three separate destinations in one sortie. The central hook is rated to carry up to 12,000kg and the other two hooks 7,500kg each. Cargo handling systems are provided by AAR Corp, Cargo Systems of Goldsboro, North Carolina.
"The Chinook helicopter's cabin provides 42m³ of cargo space and can accommodate two HMMWVs."The cabin provides 42m³ of cargo space and 21m² of cargo floor area and can accommodate two HMMWVs (high-mobility multipurpose wheeled vehicle) or a HMMWV together with 105mm howitzer and gun crew.
The main cabin can hold from 33 fully equipped troops to 50 troops, according to the seating arrangements and equipment being carried. For medical evacuation, the cabin can accommodate 24 litters (stretchers). Ramp operations can be carried out on water using an optional power-down ramp and water dam configuration.
Engines
The helicopter is equipped with two T55-L-712 turboshaft engines from Honeywell (formerly AlliedSignal), which are pod-mounted on either side of the rear pylon under the rear rotor blades. The engine provides a continuous power of 3,000shp and maximum power of 3,750shp. The Honeywell T55-714 engine, which is being fitted to CH-47D, F and G models, is equipped with FADEC (full authority digital electronic control) from Goodrich.
The self-sealing fuel tanks are mounted in external fairings on the sides of the fuselage. The fixed tanks hold 3,900l of fuel. Three additional fuel tanks can be carried in the cargo area. The range of the helicopter can be extended by in-flight refuelling.
Landing gear for the CH-47F is supplied by Cirtor Aerospace of Corona, California
