How does a British Chinnok Mk. III compare to a CH-47D?
I have in mind comparing Merlin and CH-47F/MH-47G/HH-47 for the re-opended CSAR competition.
"The CH-47F design features alterations to the airframe structure to reduce the effects of vibration ... "
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.
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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).
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The CH-47F design features alterations to the airframe structure to reduce the effects of vibration, as well as other structural enhancements to 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 [each] have thrust of 3,529kW (4,733shp). The operating range is increased to 609km (329nm) with mission radius of 370.4km (200nm).
CH-47D/F / MH-47E Chinook Heavy Lift Helicopter - Army Technology