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Westland Wessex HC Mk.2 helicopter

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Specifications Comment this helicopter
Picture Wessex_HC_Mk2
General
Manufacturer Westland
Type Wessex HC Mk.2
Introduced 1/1/1961
In production? No
Units produced 356
Price US $ 0.00
Dimensions
Overall Length 65.7 ft
Length 48.4 ft
Height 16.2 ft
Width 0 ft
   
   
Description

The Wessex HC Mk.2 is a SAR and troop transport helicopter developed by Westland Aircraft. Today known as AgustaWestland.

Following the success of the turboshaft-powered Westland Whirlwind, the company began development of the Wessex.

The Wessex was developed with the UK’s Royal Navy in mind, but would later also count the Royal Air Force among its customers. A limited number of civilian versions also made their way out of the factory and there were some export sales as well. However, the main role that defined the Wessex is undoubtedly search and rescue.

When designing the Wessex, Westland had anti-submarine warfare in mind. To this end, the idea was to have a helicopter with a large airframe and a powerful turboshaft powerplant.

The Wessex is actually not a ground-up design or based on any previous Westland helicopter. It is actually a licensed redesign of the Sikorsky H-34/S58.

Westland had their work cut out for them however, since the S-58 came equipped with a piston-powered engine. Specifically a Wright R-1820. Westland were quick to whip this out and replace it with a Napier Gazelle NGa turboshaft. This would be the first demonstrator platform for the modification that would become the Wessex. This first craft flew in its turboshaft form in 1957.

Soon after, Westland built its own versions of this demonstrator as pre-production models, the first helicopters to officially carry the Wessex name.

Introduced in 1961, the Wessex was produced from 1958 to 1970. In total 382 were built and the last official flight was recorded in 1995. In total the helicopter was in service for 29 years and the RAF fleet racked up 11 000 flight hours during that time.

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Design features
  • Based on Sikorsky S-58
  • Turbine powered
Description

The Wessex HC Mk.2 is a SAR and troop transport helicopter developed by Westland Aircraft. Today known as AgustaWestland.

Following the success of the turboshaft-powered Westland Whirlwind, the company began development of the Wessex.

The Wessex was developed with the UK’s Royal Navy in mind, but would later also count the Royal Air Force among its customers. A limited number of civilian versions also made their way out of the factory and there were some export sales as well. However, the main role that defined the Wessex is undoubtedly search and rescue.

When designing the Wessex, Westland had anti-submarine warfare in mind. To this end, the idea was to have a helicopter with a large airframe and a powerful turboshaft powerplant.

The Wessex is actually not a ground-up design or based on any previous Westland helicopter. It is actually a licensed redesign of the Sikorsky H-34/S58.

Westland had their work cut out for them however, since the S-58 came equipped with a piston-powered engine. Specifically a Wright R-1820. Westland were quick to whip this out and replace it with a Napier Gazelle NGa turboshaft. This would be the first demonstrator platform for the modification that would become the Wessex. This first craft flew in its turboshaft form in 1957.

Soon after, Westland built its own versions of this demonstrator as pre-production models, the first helicopters to officially carry the Wessex name.

Introduced in 1961, the Wessex was produced from 1958 to 1970. In total 382 were built and the last official flight was recorded in 1995. In total the helicopter was in service for 29 years and the RAF fleet racked up 11 000 flight hours during that time.

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Design features:
  • Based on Sikorsky S-58
  • Turbine powered
Performance
Persons 18
Max. Range 310 mi
Cruise Speed 122 mph
Max. Speed 132 mph
Max. rate of Climb 1650 ft/min
HOGE ceiling 0 ft
Service Ceiling 12000 ft
Gross Weight 13499 lb
Empty Weigt 8305 lb
Useful Load 5194 lb
Dynamic system
Fuel Capacity 360 gallons
Number of Engines 2
Engine Type Turbine
Engine Code Bristol Siddeley Gnome Mk110/111
Horse Power 1350
Rotorhead Fully articulated
Number of rotorblades 4
Rotor Diameter 56 ft
Number of tail rotorblades 4
Tailrotor Diameter 9.5 ft
Blueprints & model
Manufacturer Website manufacturer..
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