Model Variants (Including Prototypes)
Bell Model 204 - Company Prototype Designation; covers XH-40, YH-40, UH-1A, B, C, E, F, HH-1K, UH-1L, P and M production models.
Bell Model 533 - Single Developmental Model based on YH-40BF evaluation model fitted with turbofan engine and wings.
Bell Model 205 - Company Designation covering UH-1D and UH-1H models; long-fuselage version based on Model 204.
Bell Model 212 - Becoming UH-1N production models; twin-engine version; also known as "Twin Pac".
XH-40 - Prototype Designation; fitted with Lycoming XT-53-L-1 engine of 700 shaft horsepower; three examples produced.
YH-40 - Modified XH-40 prototypes for evaluation purposes; increased cabin space; six examples produced.
HU-1A - Initial Production model; redesignated to UH-1A after 1962; 182 examples produced.
TH-1A - Conversion dual-control trainers based on HU-1A/UH-1A production models; 14 examples converted in this fashion.
XH-1A - Single developmental UH-1A for use in grenade launcher tests.
YUH-1B - Four Prototype B-model examples.
HU-1B - Improved UH-1A model; 1,014 examples produced.
NUH-1B - Single Test Variant
UH-1C - UH-1B model with improved powerplant, revised blades and rotor-head; 767 examples produced.
YUH-1D - Pre-production UH-1D models; 7 examples produced.
UH-1D - Troop Transport (seating for 13); long fuselage cabin; based on Bell Model 205; 2,008 examples produced.
HH-1D - US Army rescue model based on UH-1D.
UH-1E - USMC models based on UH-1B and UH-1C production models; varying systems; 192 examples produced.
NUH-1E - Single UH-1E example for testing.
TH-1E - USMC trainer model converted from UH-1C production models; 20 examples produced.
UH-1F - USAF UH-1B and UH-1C production models; fitted with General Electric T-58-GE-3 engine of 1,325 shaft horsepower; 120 examples produced.
TH-1F - USAF trainer based on UH-1F production models; 26 examples produced.
UH-1H - Improved UH-1D models; semi-rigid all-metal main rotor and rigid delta hinged tail rotor; fitted with Lycoming T-53-L-13 engine of 1,400 shaft horserpower; seating for 13 troops; 5,435 examples produced.
UH-1H "Nighthawk" - Special night operations interdiction model; fitted with Zenon searchlight, M134 7.62mm minigun, 2 x M60D 7.62mm machine guns and 1 x M2HB 12.7mm machine gun; crew of two pilots and four gunners.
CUH-1H - Canadian UH-1H utility production models; 10 examples produced; later redesignated to CH-118.
EH-1H - Electronic Warfare conversion aircraft for Project Quick Fix; fitted with AN/ARQ-33 interception and jamming system; 22 examples modified in this fashion.
HH-1H - USAF Search and Rescue (SAR) variant; 30 examples produced.
JUH-1 - Battlefield Surveillance Aircraft; fitted with under-fuselage radar system.
TH-1H - USAF flight trainers modified from UH-1H production models.
UH-1G - Cambodian armed UH-1H; unofficial designation.
UH-1J - Japanese license-production (Fuji) of an improved UH-1H variant; fitted with Allison T53-L-703 turboshaft engine of 1,800 shaft horsepower; updates include night vision capability and countermeasures.
HH-1K - USN Search and Rescue Variant; 27 examples produced.
TH-1L - USN Flight Trainer based on the HH-1K; 45 examples produced.
UH-1L - Utility Model based on TH-1L trainer; 8 examples produced.
UH-1M - Gunship model based on UH-1C; fitted with Lycoming T-53-L-13 engine of 1,400 shaft horsepower.
UH-1N - Twin Engine Variant based on Bell Model 212.
UH-1P - USAF Special Operations and Attack models.
EH-1U - Multiple Target Electronic Warfare System (MULTEWS).
UH-1V - US Army MedEvac Variant.
EH-1X - Electronic Warfare Platforms based on modified UH-1H models; 10 examples converted in this fashion.
UH-1Y - Upgraded UH-1N late production models.
UH-1Y "Venom" - Modern USMC productiom models developed from UH-1N Twin Huey; four-badem all-composite rotor system; upgraded transmission and engines; increased MTOW, range and speed; digital cockpit with MFDs; increased parts commonality with AH-1Z Cobra attack helicopters; a total of 123 on order.
Agusta-Bell AB 204 - Augusta-Bell license-production military transports for Italy.
Agusta-Bell AB 204AS - Augusta-Bell license-production Anti-Submarine Warfare (ASW) helicopters for Italy.
Fuji-Bell 204B-2 "Hiyodori" - Fuji Heavy Industries license-production military transports for use by Japanese Ground Self-Defense Force.
Bell 205A-1 - Military Utility Transport based on UH-1H models.
Bell 205A-1A - Israeli export gunship/transport models based on 205A-1 transports; hardpoints for external armament.
Agusta-Bell AB 205 - Augusta-Bell license-production military utility transports for Italy.
AIDC UH-1H - Aerospace Industrial Development Corporation license-production military utility transport models for Taiwan.
Dornier UH-1D - Dornier Flugzeugwerke license-production military utility transport models for Germany.
Fuji-Bell 205A-1 (HU-1H) - Fuji license-production military utility transport models for use by Japanese Ground Self-Defense Force.
"Huey II" - Improved and Updated model for military market; based on UH-1H production models.
UH-1/T700 "Ultra Huey" - Improved and Updated model for commercial market; fitted with General Electric T700-GE-701C turboshaft engine.