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The Westland Sea King is a licence-built
version of the US Sikorsky S-61. The Royal Navy's HAS Mark 1 aircraft's
first flight was in 1969. Since that time, the aircraft has been
extensively upgraded and passed through a series of Marks.
The Sea King Mk 7 is used for airborne surveillance and control and has
Search Water 2000 Radar carried in a radardome that can be swivelled
down underneath the aircraft for operational air and sea searches. In
addition, there is an Orange Crop Electronic Support Measures system
fitted.
A detachment of 3 x AEW 2 aircraft generally deploys with each
assault ship. The newly upgraded Merlin Mk 2 will replace the Sea King
Mark 7 and is capable of fulfilling several roles, including provision
of the Airborne Surveillance and Control capability.
The Sea King HC4 (Commando) is a tactical military helicopter capable of
transporting 28 fully equipped troops or 6,000 lbs (2,720 kg) as an
internal load. Carrying 28 troops the aircraft has a range of about 246
miles (396 km). The first HC4 deliveries were made to the Royal Navy in
1979.
By the end of 2015, 20 x Merlin Mk 3 Medium Support Helicopters will be
transferred from the RAF to the Commando Helicopter Force.
The Mk 5 aircraft in service with 771 Sqn are SAR aircraft (Search &
Rescue). RN SAR aircraft are stationed at Prestwick and Culdrose.
From 2016, 10 x Sikorsky S92s and 10 x
AgustaWestland AW189s operated by Bristow Helicopters will replace the
Sea Kings Mk 5. Current plans suggest that the last Sea Kings will
retire from service at the end of March 2016.
Sea King HC 4 Specifications |
Crew |
1 x pilot and 1 x
aircrewman |
Fuselage Length |
22m |
Width |
3.78m |
Height |
4.72m |
Weight (empty) |
6201kg |
Max Take-off
weight |
9525kg |
Rotor Diameter |
18.9m |
Cruising Speed |
208km/h (129mph) at
sea level |
Service Ceiling |
1,220m |
Engines |
2 x Rolls Royce Gnome H
1400 IT turboshafts mounted side by side above the cabin |
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