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Bell 212


AB-212, UH-1N


Overview


Bell 212

US Marine Corps UH-1N armed with rocket pods and door mounted heavy machine guns.
Source: Looper5920 - © public domain

Origin
United States
Type
Transport helicopter
Entered service
1971
Status
In service
Development
1968 - 1970 (design project)
1968/1969 (first flight)
Developer
United States - Bell Helicopters
Production
1971 - 1998
Producer
United States - Bell
Canada - Bell
Italy - Agusta-Bell
Designations
UH-1N (US military service)
Twin Two-Twelve (civilian designation)
AB-212 (Italian production)
CH-135 Twin Huey (Canadian service)
HP AH Mk1 (UK service)
HU.18 (Spanish service)

Description


Introduction

The Bell 212 is a transport helicopter of US origin. It was developed in the mid 1960's in cooperation with the Canadian government. It is a follow on to the successful Bell 205. As with earlier Bell helicopters the Bell 212 was also produced under license in Italy as the AB-212. A further development of the Bell 212 is the Bell 412 with a four blade main rotor.

Layout

The Bell 212 is based on the long fuselage of the Bell 205. Whereas the Bell 205 was powered by a single large engine the Bell 212 has two smaller engines side by side. The two engines deliver their power to a combining gearbox which in turn is connected to the shaft. Many parts are interchangeable with the Bell 205, including most of the airframe and the main and tail rotor.

Firepower

Most Bell 212 are unarmed or feature a 7.62mm machine gun in the doors. A small number has been fitted with gun and rocket pods, both in US service and for export sales.

Cargo

The internal volume of the Bell 212 is similar to the Bell 205, resulting in a similar capacity of 13 troops or 6 stretchers. The 1.8 t internal load capacity and 2.3 t sling capacity are an improvement over the Bell 205. The ability to carry more weight is what made the Bell 212 a more practical candidate for ASW conversion than its predecessor.

Mobility

The combined power output of the two turboshaft engines is more than that of the Bell 205, resulting in improved flight characteristics. The maximum speed is 269 km/h and cruise speed is 230 km/h. Only the range and climb rate have been slightly reduced. Should an engine fail the other engine is able to provide enough power for a safe landing, even at maximum weight.

Users


The Bell 212 and AB-212 have been produced in large numbers, although not as much as the Bell 205. Still over 60 nations from every continent adopted the Bell 212 or its Italian counterpart. Many nations, including the USA, adopted the Bell 212 because of its parts and maintenance commonality with the previous Bell 204 and 205.

Variants


Bell 212

Canadian military Bell 212 clearly showing its slighly more pointed nose compared to the Bell 205.
Source: Ahunt - © public domain

Variants of the Bell 212

Bell 212
Official Bell designation for Model 212 production for military use.
UH-1N
Standard Bell 212 in US military use.
HH-1N
Bell 212 in US military service with hoist for SAR duties.
VH-1N
Bell 212 in US military service for VIP transport.
AB-212
Italian license production of Bell 212 by Agusta-Bell. It is identical to the Bell 212.
AB-212ASW
Anti-submarine warfare variant developed in Italy by Agusta-Bell.
AB-212EW
Electronic Warfare conversion of the AB-212.

Details


Facts Bell 212
General
Origin
United States
Type
Transport helicopter
Crew
2 + 13 (2 pilots, 13 troops)
Dimensions
Length
17.46 m rotors turning
12.92 m fuselage
Width
2.86 m stabilizer span
Height
4.53 m to rotorhead
Empty weight
2.79 t
Max takeoff weight
5.08 t
Propulsion
Powerplant
2x Pratt & Whitney T400-CP-400
Power output
1.290 hp combined during take-off
1.130 hp continuous
Rotor setup
Two blade main rotor
Two blade tail rotor
Diameter
14.69 m main rotor
2.59 m tail rotor
Disc area
174 m² main
5.3 m² tail
Fuel
814 L
Performance
Max speed
259 km/h at sea level
Cruise speed
230 km/h
185 km/h economic
Operational range
420 km
Ceiling
4.3 km
Climb rate
6.7 m/s
Armament
Hardpoints
None
Fixed gun
Optional 7.62mm M60 machine gun in each door
Transport capacity
Passengers
13 troops
6 stretchers
Cargo capacity
1.8 t internal
2.3 t cargo on sling
Hoist
Optional

Media


Related articles


AB-212ASW

The AB-212ASW is a naval helicopter based on the Bell 212 airframe. It is produced by Agusta-Bell in Italy.