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Variants
XH-40: The initial Bell 204 prototype. Three prototypes were built, equipped with the Lycoming XT-53-L-1 engine of 700 shp.
Bell XH-40 prototype. (Source: U.S. Army)
– Bell Model 533: One YH-40BF rebuilt as a flight test bed with turbofan engines and wings.
HU-1A: Initial Bell 204 production model, redesignated as the UH-1A in 1962. 182 built.
– TH-1A: UH-1A with dual controls and blind-flying instruments, 14 conversions.
– XH-1A: A single UH-1A was redesignated for grenade launcher testing in 1960.
HU-1B: Upgraded HU-1A, various external and rotor improvements. Redesignated UH-1B in 1962. 1014 built plus four prototypes designated YUH-1B.
– NUH-1B: a single test aircraft, serial number 64-18261.
UH-1C: UH-1B with improved engine, modified blades and rotor-head for better performance in the gunship role. 767 built.
YUH-1D: Seven pre-production prototypes of the UH-1D.
UH-1D: Initial Bell 205 production model (long fuselage version of the 204). Designed as a troop carrier to replace the CH-34 then in US Army service. 2008 built many later converted to UH-1H standard.
– HH-1D: Army crash rescue variant of UH-1D.
UH-1E: UH-1B/C for USMC with different avionics and equipment. 192 built.
– NUH-1E: UH-1E configured for testing.
– TH-1E: UH-1C configured for Marine Corps training. Twenty were built in 1965.
UH-1F: UH-1B/C for USAF with General Electric T-58-GE-3 engine of 1,325 shp. 120 built.
– TH-1F: Instrument and Rescue Trainer based on the UH-1F for the USAF. 26 built.
UH-1G: UH-1D/H gunships operating with the Cambodia armed forces were locally given the designation UH-1G.
UH-1H: Improved UH-1D with a Lycoming T-53-L-13 engine of 1,400 shp. 5435 built.
– CUH-1H: Canadian Forces designation for the UH-1H utility transport helicopter. Redesignated CH-118. 10 built.
– EH-1H: Twenty-two aircraft converted by installation of AN/ARQ-33 radio intercept and jamming equipment for Project Quick Fix.
– HH-1H: SAR variant for the USAF with rescue hoist.30 built.
– JUH-1: Five UH-1Hs converted to SOTAS battlefield surveillance configuration with belly-mounted airborne radar.
– TH-1H: Recently modified UH-1Hs for use as basic helicopter flight trainers by the USAF.
UH-1J: An improved Japanese version of the UH-1H built under license in Japan by Fuji was locally given the designation UH-1J. Among improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.
HH-1K: Purpose built SAR variant of the Model 204 for the US Navy with USN avionics and equipment. 27 built.
TH-1L: Helicopter flight trainer based on the HH-1K for the USN. Forty-five were built.
– UH-1L: Utility variant of the TH-1L. Eight were built.
UH-1M: Gunship specific UH-1C upgrade with Lycoming T-53-L-13 engine of 1,400 shp.
UH-1N: Initial Bell 212 production model, the Bell "Twin Pac" twin-engined Huey.
UH-1P: UH-1F variant for USAF for special operations use and attack operations used solely by the USAF 20th Special Operations Squadron, "the Green Hornets".
UH-1U: Single prototype for Counter Mortar/Counter Battery Radar Jamming aircraft. Crashed at Edwards AFB during testing.
UH-1V: Aeromedical evacuation, rescue version for the US Army.
EH-1X: Ten Electronic warfare UH-1Hs converted by under "Quick Fix IIA".
UH-1Y: Upgraded variant developed from existing upgraded late model UH-1Ns, with additional emphasis on commonality with the AH-1Z.
UH-1/T700 Ultra Huey: Upgraded commercial version, fitted with a 1,400-kW (1900-shp) General Electric T700-GE-701C turboshaft engine.
Note: In U.S. service the G, J, Q, R, S, T, W and Z model designations are used by the AH-1. The UH-1 and AH-1 are considered members of the same H-1 series. The military does not use I (India) or O (Oscar) for aircraft designations to avoid confusion with "one" and "zero" respectively.
Other military variants
Bell 204: Bell Helicopters company designation, covering aircraft from the XH-40, YH-40 prototypes to the UH-1A, UH-1B, UH-1C, UH-1E, UH-1F, HH-1K, UH-1L, UH-1P and UH-1M production aircraft.
Agusta-Bell AB 204: Military utility transport helicopter. Licensed built in Italy by Agusta.
Agusta-Bell AB 204AS: Anti-submarine warfare, anti-shipping version of the AB 204.
Fuji-Bell 204B-2: Military utility transport helicopter. Built under license in Japan by Fuji Heavy Industries. Used by the Japan Ground Self-Defense Force under the name Hiyodori.
Bell 205: Bell Helicopters company designation of the UH-1D and UH-1H helicopters.
– Bell 205A-1: Military utility transport helicopter version, initial version based on the UH-1H.
– Bell 205A-1A: As 205A-1, but with armament hardpoints and military avionics. Produced specifically for Israeli contract.
– Agusta-Bell 205: Military utility transport helicopter. Built under license in Italy by Agusta.
AIDC UH-1H: Military utility transport helicopter. Built under license in Taiwan by Aerospace Industrial Development Corporation.
Dornier UH-1D: Military utility transport helicopter. Built under license in Germany by Dornier Flugzeugwerke.
Fuji-Bell 205A-1: Military utility transport helicopter. Built under licence in Japan by Fuji. Used by the Japanese Ground Self Defence Force under the designation HU-1H.
Bell Huey II: A modified and re-engined UH-1H, significantly upgrading its performance, and its cost-effectiveness. Currently offered by Bell to all current military users of the type.
Sources:
Wikipedia: UH-1 Iroquois "Huey"
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