Bell UH-1N Twin Huey vs Sikorsky S-92

In service^[source]

United States Air Force United States Marine Corps (historical) Canadian Forces (historical) United States Navy (historical)^[source]

CHC Helicopter Petroleum Helicopters International Bristow Helicopters Cougar Helicopters^[source]

1969–1970s^[source]

1998–present^[source]

October 1970^[source]

2004^[source]

April 1969^[source]

December 23, 1998^[source]

Bell UH-1H Iroquois^[source]

Sikorsky S-70^[source]

Bell 212 Bell 412 Bell UH-1Y Venom^[source]

Sikorsky CH-148 Cyclone Sikorsky VH-92^[source]

6–8 combat-equipped troops, or 4,400 lb (1,996 kg) equivalent cargo^[source]

19 passengers^[source]

1,808 sq ft (168.0 m 2 )^[source]

2,492.3 sq ft (231.54 m 2 )^[source]

- root: NACA 0010.8 ; tip: NACA 0005.4 mod^[source]

- root: Sikorsky SC2110; tip: Sikorsky SSC-A09^[source]

medium military helicopter^[source]

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

at least 300^[source]

20 ft (6 m) long by 6.6 ft (2 m) tall^[source]

9.8 lb/sq ft (48 kg/m 2 )^[source]

0.23 hp/lb (0.38 kW/kg)^[source]