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USMC UH-1Ns were used by the USMC during its 2003 invasion of Iraq. By the end of the hostilities both aircraft were still intact but were dismantled by the Argentinians. The UH-1N is also used by the 36th Rescue Flight (36 RQF) at Fairchild AFB, WA for conducting Search-and-Rescue (SAR) and medical evacuation missions.ĭuring the 1982 Falklands War, the Argentine Air Force deployed two Bell 212s to Goose Green grass airstrip from where they performed general support duties including the recovery of many downed pilots. Warren AFB and Malmstrom AFB to missile launch sites in North Dakota, Montana, Wyoming, Nebraska, and Colorado. The United States Air Force employs UH-1Ns to fulfill its ICBM mission, providing a utility helicopter for transport between bases such as Minot AFB, Francis E. Armed with Miniguns (or 40 mm grenade launchers) and rocket pods, and painted camouflage with no US markings and only a Green Hornet insignia, the UH-1N supported Special Forces reconnaissance missions from Cam Ranh Bay. Operational history Military service įrom late 1970, the UH-1N re-equipped the USAF 20th Special Operations Squadron in Vietnam, replacing the single-engined UH-1F and UH-1P. This modification removed the gyroscopic "Stabilization Bar" on top of the main rotor head, instead relying on the computer system for stability. The United States Marine Corps (USMC) modified a large number of their UH-1Ns with a Stability Control Augmentation System (SCAS) which provides servo inputs to the rotor head to help stabilize the aircraft during flight. Should one engine fail the remaining engine can deliver 671 kW (900 shp) for 30 minutes or 571 kW (765 shp) enabling the UH-1N to maintain cruise performance at maximum weight. They are capable of producing up to 1,342 kW (1,800 shp). The UH-1N's main rotor is powered by a PT6T-3/T400 Turbo Twin Pac made up of two Pratt & Whitney Canada PT6 turboshaft power turbines driving a single output shaft. Navy HH-1N from NAS China Lake at the Mojave Spaceport Design File:UH-1N-6.jpgĪ USAF UH-1N during Exercise Wounded Eagle '83 File:UH-1N-2.jpgĪ Marine UH-1N sitting on the flight line at NAS Whiting Field, Florida, in 1982 File:Navy-hh1n-158256-07.jpg The UH-1N has also been developed into the upgraded, four-blade UH-1Y. The Bell 412 is a further development of the Bell 212, the major difference being the composite four-blade main rotor. Unlike in the Canadian Forces, in US service, the UH-1N retained the official name "Iroquois" from the single engined UH-1 variants, although US service personnel refer to the aircraft as a "Huey" or "Twin Huey". As a result the United States military services ordered 294 Bell 212s under the designation UH-1N, with deliveries commencing in 1970. Congress only approved the purchase when it was assured that a US source would be found for the PT6T/T400 engines. Rivers was also concerned that procurement of the engines would result in a negative trade deficit situation with Canada. The Liberal Canadian government of the time had not supported US involvement in Vietnam and had opposed US policies in southeast Asia, as well as accepting US draft dodgers. Rivers took this position because the aircraft powerplant, the Pratt & Whitney Canada PT6T was produced in Canada. The purchase of the aircraft for US military use was opposed by the Chairman of the House Armed Services Committee at the time, L.

The US military came very close to not procuring the Twin Huey.

File:En-MFO1.JPGĬanadian CH-135 Twin Hueys serving with the Multinational Force and Observers Sinai, Egypt 1989 The CF approved the development of the aircraft on and purchased 50 aircraft, with deliveries commencing in May 1971. Later the CF adopted a new designation system and the aircraft was re-designated as the CH-135 Twin Huey. Based on the stretched fuselage Bell 205, the Bell 212 was originally developed for the Canadian Forces (CF) under the designation CUH-1N Twin Huey.