Credit
U.S. Navy Photo by Mass Communication Specialist 3rd Class Ian Carver · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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At a glance
Measured figures
USMC UH-1N, as modified · Length
Single source57 ft 8 in (17.58 m)[source]
Configuration
| Specification | Bell UH-1N Twin Huey | Eurocopter EC225 Super Puma |
|---|---|---|
| Type | Utility helicopter[source] | Passenger transport helicopter[source] |
| National origin | United States / Canada[source] | Multinational[source] |
| Manufacturer | Bell Helicopter[source] | Eurocopter Airbus Helicopters[source] |
| Status | In service[source] |
H225 · Length
19.5 m (64 ft 0 in)[source]
Maximum take-off; USMC UH-1N, as modified · Max takeoff weight
Single source10,500 lb (4,763 kg)[source]
Cruise; USMC UH-1N, as modified · Cruise speed
Single sourceMaximum; USMC UH-1N, as modified · Maximum speed
Single source130 kn (150 mph, 240 km/h)[source]
110 kn (130 mph, 200 km/h)[source]
Cruise; H225 · Cruise speed
Single sourceMaximum; H225 · Maximum speed
Single sourceUSMC UH-1N, as modified · 1 × Pratt & Whitney Canada T400-CP-400 coupled turboshaft engine, 1,250 shp (
Single source1 × Pratt & Whitney Canada T400-CP-400 coupled turboshaft engine, 1,250 shp (930 kW)[source]
H225 · 2 × Turbomeca Makila 2A1 turboshaft engines each
Single source2 × Turbomeca Makila 2A1 turboshaft engines, 1,776 kW (2,382 hp) each[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| — |
| Primary users | United States Air Force United States Marine Corps (historical) Canadian Forces (historical) United States Navy (historical)[source] | — |
|---|
| Manufactured | 1969–1970s[source] | 1999–present[source] |
|---|
| Introduction date | October 1970[source] | December 2004[source] |
|---|
| First flight | April 1969[source] | 27 November 2000[source] |
|---|
| Developed from | Bell UH-1H Iroquois[source] | Eurocopter AS332 Super Puma[source] |
|---|
| Variants | Bell 212 Bell 412 Bell UH-1Y Venom[source] | — |
|---|
| Capacity | 6–8 combat-equipped troops, or 4,400 lb (1,996 kg) equivalent cargo[source] | 24 passengers + 1 cabin attendant[source] |
|---|
| Main rotor area | 1,808 sq ft (168.0 m 2 )[source] | 206.15 m 2 (2,219.0 sq ft)[source] |
|---|
| Blade section | - root: NACA 0010.8 ; tip: NACA 0005.4 mod[source] | — |
|---|
| Role | medium military helicopter[source] | long-range passenger transport helicopter[source] |
|---|
| Source measurement | The Bell UH-1N Twin Huey is a twin-engined medium-sized military helicopter primarily operated as a utility transport. Power is provided by a PT6T-3/T400 Turbo Twin Pac, comprising a pair of Pratt & Whitney Canada PT6 turboshaft engines mounted side by side and driving a shared gearbox and single output shaft. These engines are capable of producing up to 1,342 kW (1,800 shp). In the event of a single power section failing, the remaining section can deliver 671 kW (900 shp) for up to 30 minutes or 571 kW (765 shp) continuously, enabling the UH-1N to maintain cruise performance at maximum weight. It is capable of flight under instrument flight rules and in nighttime conditions.[source]Bell UH-1N Twin Huey · Design; only the objects and conditions stated in this passage The UH-1N is often flown with a four-person crew, comprising two pilots and two crew chiefs; while in the air, these crew chiefs man the weapons, while one pilot functions as a navigator and the other actively flies. The interior is normally outfitted with a 15-seat configuration, in which it can be flown by a single pilot and carry up to 14 passengers; in practice, rarely could the UH-1N actually carry this many unless also carrying limited fuel and equipment due to weight limitations and weather conditions.[source]Bell UH-1N Twin Huey · Design; only the objects and conditions stated in this passage When configured to carry cargo, the cabin has an internal capacity of 220 ft³ (6.23 m³). Up to six litters can be carried in a medical evacuation arrangement. An external load of up to 5,000 lb (2,268 kg) can also be carried. In United States Marine Corps (USMC) service, up to three radios would be installed in the cabin so that commanders could remain airborne while coordinating ground troops. The UH-1N was normally armed with a single .50 caliber machine gun on the helicopter's left side, while a 7.62 millimeter machine gun is mounted on the right side.[source]Bell UH-1N Twin Huey · Design; only the objects and conditions stated in this passage Starting in late 1970, mere months after receiving its first deliveries of the type, the USAF begun to re-equip the 20th Special Operations Squadron in Vietnam with UH-1Ns, supplementing and eventually replacing the single-engined UH-1F and UH-1P. 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 .[source]Bell UH-1N Twin Huey · Operational history; only the objects and conditions stated in this passage The AB 212ASW is a Model 212 Twin Huey with a prominent radome above the cockpit. Early production had a dome-shaped radome, while later production had a flatter "drum" radome. A left side winch is used for dipping the Bendix ASQ-18 sonar. Other changes include structural reinforcement for a gross weight of 11,197 lbs (5,080 kg), ECM , shipboard deck tie-down attachments and corrosion protection. Armament is two Mk 44 or Mk 46 torpedoes or two depth charges in the ASW role and four AS.12 air-to-surface wire-guided missiles for the anti-shipping role.[source]Bell UH-1N Twin Huey · Variants / Italian-built variants; only the objects and conditions stated in this passage Capacity: 6–8 combat-equipped troops, or 4,400 lb (1,996 kg) equivalent cargo[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Length: 57 ft 8 in (17.58 m)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Height: 14 ft 5 in (4.39 m)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Max takeoff weight: 10,500 lb (4,763 kg)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Powerplant: 1 × Pratt & Whitney Canada T400-CP-400 coupled turboshaft engine, 1,250 shp (930 kW)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage 900 shp (671 kW) emergency rating for each power section[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Main rotor diameter: 48 ft 0 in (14.63 m)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Main rotor area: 1,808 sq ft (168.0 m 2 )[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Maximum speed: 130 kn (150 mph, 240 km/h)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Cruise speed: 110 kn (130 mph, 200 km/h)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Range: 248 nmi (285 mi, 459 km)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Service ceiling: 17,300 ft (5,300 m)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage Rate of climb: 1,755 ft/min (8.92 m/s)[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage 2.75-inch (70 mm) rocket pods,[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage 0.50 in (12.7 mm) GAU-16 machine gun,[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage 7.62 mm (0.308 in) GAU-17 minigun or 7.62 mm (0.308 in) M240 lightweight machine gun[source]Bell UH-1N Twin Huey · Specifications (USMC UH-1N, as modified); only the objects and conditions stated in this passage CH-135 Twin Huey 135137 in the original blue-gray and green camouflage pattern worn by these aircraft prior to 1986/88.[source]Bell UH-1N Twin Huey · Gallery; only the objects and conditions stated in this passage CH-135 Twin Huey 135135 in the early-style SAR markings, 1988. This aircraft was serving with Base Rescue Goose Bay and had formerly been assigned to 424 Transport & Rescue Squadron, CFB Trenton .[source]Bell UH-1N Twin Huey · Gallery; only the objects and conditions stated in this passage CH-135 Twin Huey 135103 in special flight test markings. The aircraft was used by the Aerospace Engineering Test Establishment at CFB Cold Lake , 1987.[source]Bell UH-1N Twin Huey · Gallery; only the objects and conditions stated in this passage | The Airbus Helicopters H225 (formerly Eurocopter EC225 Super Puma ) is a long-range passenger transport helicopter developed by Eurocopter as the next generation of the civilian Super Puma family. It is a twin-engined aircraft and can carry up to 24 passengers along with two crew and a cabin attendant, dependent on customer configuration. The helicopter is marketed for offshore support and VIP passenger transport duties, as well as public service missions.[source]Eurocopter EC225 Super Puma · Lead; only the objects and conditions stated in this passage In February 2014, Airbus Helicopters announced at Heli-Expo 2014 the development of an improved variant, the EC225e. The EC225e features numerous changes including new avionics systems, such as the TCAS II collision avoidance system, an automatic identification system, and a specialized rig-approach system; it was also intended to feature an improved Turbomeca Makila 2B engine to increase the EC225e's maximum takeoff weight by 550 kg, and an additional fuel tank in the rear baggage compartment to extend its range to 300 nautical miles with up to ten passengers on board. Some, but not all, modifications can be retrofitted onto existing EC225s. In the same announcement, in February 2014, Lease Corporation International said that they had placed a $645 million order for 15 EC225e (along with 6 Airbus Helicopters EC175 ) helicopters as the launch customer. In February 2016, the Makila 2B engine was dropped from the EC225e as a cost reduction measure, development of the other structural and avionics aspects is proceeding.[source]Eurocopter EC225 Super Puma · Development; only the objects and conditions stated in this passage A key safety feature of the aircraft's main gear box (MGB) is an emergency oil spraying sub-system present in the lubrication system; this is designed to exceed the JAR 29 Standard's requirements of a 30-minute running time in the event of the loss of MGB oil pressure, and has demonstrated up to 50-minute running time. The engine also incorporates a "blade shedding" system to ensure engine integrity during an overspeed instance. Energy absorbent self-sealing fuel tanks are contained in the aircraft's sponsons , along with other equipment such as downward-facing illumination and navigation lighting fixtures. The transmission can accommodate more power than the maximum output of the engines; however two aircraft were lost in 2012 due to the cracking of the bevel gear shaft, a gearbox component. In response, the design of the transmission was modified in 2013, and the onboard health and usage monitoring system (HUMS) was upgraded to provide real-time monitoring of the bevel gear shaft against the threat of crack formation. |
|---|
| Primary user | — | CHC Helicopter[source] |
|---|
| Number built | — | 170+ (as of 2016 )[source] |
|---|
| Variant | — | Eurocopter EC725[source] |
|---|
| Never exceed speed | — | 324 km/h (201 mph, 175 kn)[source] |
|---|
In terms of cockpit equipment and avionics, the H225 is equipped with a full glass cockpit with active-matrix liquid crystal displays ; these include four 6-inch by 8-inch multi-functional displays as the predominant instrumentation for key flight information, two 4-inch by 5-inch monitors for displaying aircraft parameters, and a 3-inch screen for backup. The advanced helicopter cockpit and avionics system is described as serving to reduce pilot and crew workload, being used to display flight management and sub-systems information and is complete with a four-axis digital autopilot. During a typical flight, the pilot programs the route into the aircraft and then monitors it, as opposed to direct continuous control of the flight; the need for paper charts has been eliminated by these systems. Under autopilot, the automatic flight control system acts to prevent pilot actions from exceeding the established flight envelope; the H225 remains flyable with all automatic systems disabled. From initiating the startup sequence to being ready to takeoff only takes three minutes.[source]Eurocopter EC225 Super Puma · Design; only the objects and conditions stated in this passage
There are currently a total of four principal configurations designed by Airbus Helicopters for the H225. The passenger transport version has a crash-worthy seating arrangement for up to 19 passengers with a high-density seating arrangement accommodating up to 28 passengers available to be fitted. The VIP transport version has a large lounge with seating for up to 12 passengers and a cabin attendant. The emergency medical services (EMS) configuration has medical units for six stretchers and four seats for medical workers. The search and rescue (SAR) configuration allows space for search and rescue equipment with an operator seat, hoistman seat and up to eight rescue seats and three stretchers. While a single pilot is capable of controlling the aircraft under visual meteorical conditions, two pilots are used in a typical crew complement and, dependent on role, a cabin attendant or flight engineer may also be present.[source]Eurocopter EC225 Super Puma · Design; only the objects and conditions stated in this passage
Icelandic Coast Guard — received 2 H225s in 2019 and 1 in 2021.[source]Eurocopter EC225 Super Puma · Operators / Military operators; only the objects and conditions stated in this passage
18 February 2009: G-REDU, an EC225 LP operated by Bond Offshore Helicopters . During a night visual approach to the ETAP platform, the helicopter descended and impacted the surface of the sea. The crew's perception of the helicopter's position and orientation relative to the platform during the final approach was erroneous. All 18 people on board survived the controlled flight into terrain (water) .[source]Eurocopter EC225 Super Puma · Accidents and incidents; only the objects and conditions stated in this passage
10 May 2012: G-REDW, an EC225 LP, carried out a controlled ditching following indications of a failure of the main gearbox (MGB) lubrication system and a subsequent failure indication warning on the emergency lubrication system. An investigation by the Air Accidents Investigation Branch (AAIB) identified a 360° circumferential crack in the bevel gear vertical shaft in the main gearbox, in the vicinity of a manufacturing weld, causing disengagement of the drive to both mechanical oil pumps.[source]Eurocopter EC225 Super Puma · Accidents and incidents; only the objects and conditions stated in this passage
22 October 2012: G-CHCN, an EC225 LP of CHC Scotia, ditched in the North Sea 32 miles south west of Shetland whilst en route from Aberdeen to the West Phoenix drilling rig. All 19 on board were rescued. A special bulletin issued by the Air Accidents Investigation Branch (AAIB) said the main and standby oil pumps were not working; a 360-degree crack found on the bevel gear vertical shaft of the gearbox had prevented the oil pump gears from being driven. A worldwide grounding of the type was initiated in response. In both of the 2012 incidents, although the main gearbox lubrication system had failed, the backup system was working correctly but displaying an erroneous warning light, due to an incorrect specification of a pressure switch, which led to the helicopters being ditched.[source]Eurocopter EC225 Super Puma · Accidents and incidents; only the objects and conditions stated in this passage
29 April 2016: LN-OJF , an EC225 LP of CHC Helikopter Service , crashed at an islet near Turøy in the Bergen archipelago, en route to Bergen Airport, Flesland , from the Gullfaks B platform in the North Sea. The helicopter was carrying 11 passengers and 2 crew members; everyone on board died. Eyewitnesses reported that the main rotor separated from the hull immediately before the crash. Due to the crash, all commercial flights by EC225 helicopters, excluding search and rescue flights, were grounded by both Norwegian and British civil aviation authorities. The subsequent investigation concluded that a gear in the main rotor gearbox had failed due to a fatigue crack that had propagated under-surface, escaping detection. As a result of the incident the German Defence Ministry had also decided to ground 3 AS532 Helicopter in government use which were manufactured by the same company.[source]Eurocopter EC225 Super Puma · Accidents and incidents; only the objects and conditions stated in this passage
18 January 2023: an EC225 carrying the Minister of Internal Affairs of Ukraine , Denys Monastyrsky , his deputy Yevhen Yenin and state secretary Yurii Lubkovych , crashed at a kindergarten in Brovary , a suburb of Kyiv , Ukraine . The crash killed 14 people, including Monastyrsky, Yenin and Lubkovych; a child was also among the fatalities, while 25 others were injured.[source]Eurocopter EC225 Super Puma · Accidents and incidents; only the objects and conditions stated in this passage
Capacity: 24 passengers + 1 cabin attendant[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Length: 19.5 m (64 ft 0 in)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Height: 4.97 m (16 ft 4 in)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Empty weight: 5,256 kg (11,587 lb)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Gross weight: 11,000 kg (24,251 lb)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Max takeoff weight: 11,200 kg (24,692 lb)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Powerplant: 2 × Turbomeca Makila 2A1 turboshaft engines, 1,776 kW (2,382 hp) each[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Main rotor diameter: 16.2 m (53 ft 2 in)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Main rotor area: 206.15 m 2 (2,219.0 sq ft)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Maximum speed: 275.5 km/h (171.2 mph, 148.8 kn)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Cruise speed: 260.5 km/h (161.9 mph, 140.7 kn)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Never exceed speed : 324 km/h (201 mph, 175 kn)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Range: 857 km (533 mi, 463 nmi)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Ferry range: 985 km (612 mi, 532 nmi)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Service ceiling: 5,900 m (19,400 ft)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage
Rate of climb: 8.7 m/s (1,710 ft/min)[source]Eurocopter EC225 Super Puma · Specifications (H225); only the objects and conditions stated in this passage