Boeing CH-47 Chinook the CH-47 have been developed since the helicopter entered service. The U.S. Army's first major design leap was the now-common CH-47D, which entered service in 1982. Improvements from the CH-47C included upgraded engines, composite rotor blades, a redesigned cockpit to reduce pilot workload, improved and redundant electrical systems, an advanced flight control system, and improved avionics. The latest mainstream generation is the CH-47F, which features several major upgrades to reduce maintenance, digitized flight controls, and is powered by two 4,733-horsepower Honeywell engines. A commercial model of the Chinook, the Boeing-Vertol Model 234, is used worldwide for logging, construction, fighting forest
Boeing Chinook (UK variants) Operation Granby in the 1991 Gulf War, attached to large peace-keeping commitments in the Balkans, the continued British presence in Afghanistan, and in Operation Telic in the 2003 Iraq War. They provide routine supply and support missions to the British military, notably in Operation Banner in Northern Ireland. The helicopter has also been of use in military humanitarian missions and the extraction of civilians from warzones, such as the evacuation of Sierra Leone in 2000, and the evacuation from Lebanon in 2006. One Chinook in particular, known by its original squadron code "Bravo November", has come to widespread public recognition