Thales Watchkeeper WK450

Watchkeeper WK450
Flight trials at Parc Aberporth in 2013
Role	Unmanned aerial vehicle
National origin	United Kingdom
Manufacturer	Thales Group
First flight	14 April 2010
Introduction	August 2014
Status	In limited service
Primary user	British Army
Developed from	Elbit Hermes 450

The Thales Watchkeeper WK450 is a Remotely Piloted Air System (RPAS) for all weather, Intelligence, Surveillance, Target Acquisition and Reconnaissance (ISTAR) use by the British Army, provided under an £800 million contract awarded in July 2005 to Thales UK.

Overview

The Watchkeeper WK450 is based on the Elbit Hermes 450 UAV. The engine is a rotary Wankel engine. It has a mass of 450 kg and a payload capacity of 150 kg, with a typical endurance of 17 hours. It was originally intended to enter service in June 2010.^[1]

First flight on 14 April 2010

The Watchkeeper is built in the UK by a joint venture company, UAV Tactical Systems (U-TacS), set up by the Israeli company Elbit Systems (51% ownership) and French company Thales. UAV Engines Ltd, who build the rotary engine in the UK, is a wholly owned subsidiary of Elbit Systems.^[2] The majority Israeli ownership has caused some unexpected problems obtaining U.S. export authorisation for anti-icing components.^[3] A prime difference between the Hermes 450 and Watchkeeper is that the 450 is fitted only with an electro-optical/infrared sensor, while the WK450 has a dual-mode synthetic aperture radar and ground moving target indication that allow it to see through weather conditions such as dust storms that the Hermes aircraft can not.^[4]

History

On 15 July 2007, the UK MoD revealed that 54 Watchkeepers will be delivered to the British Army. The average cost to the taxpayer is therefore £800m divided by 54 aircraft, approximately £15m per platform.^[5] However, this figure includes construction of new basing facilities at Boscombe Down airfield, ground training facilities and simulators at the School of Artillery, Viking armoured vehicles and other equipment for tactical parties, ground control stations, development and testing of extensive aircraft modifications including automatic take-off and landing and the integration and provision of new sensors including radars.

Watchkeeper's first UK flight took place on Wednesday 14 April 2010 from ParcAberporth in Wales.^[6]

In October 2010, the contract was extended by a further 18 months,^[7] and the delivery date slipped.^[8] Deployment by the Royal Artillery was said to be imminent in 2013,^[9] though certification by the Military Aviation Authority was still awaited.^[10] As of 2013, the programme was running about three years late;^[11] in September, release to service approval was expected to be granted before the end of the year.^[12] British Army officials said the Watchkeeper could enter service in spring 2014.^[13] As of January 2014, 26 air vehicles have been produced with another 28 on order, and 14 ground control stations have been produced with one more on order. Watchkeeper aircraft had performed over 600 flights totaling 950 flight hours. The Watchkeeper system will be in service with the British Army until 2040.^[14]

The Royal Artillery has a future aspiration to weaponise Watchkeeper.^[9]

In February 2014, the French Ministry of Defense indicated that the French Army may purchase the Watchkeeper WK450 if the British Army buys the French VBCI armored personnel carrier.^[15]

In March 2014, the Watchkeeper was cleared for military flight training with the Royal Artillery. Operating out of Boscombe Down in Wiltshire, 1st Artillery Brigade is training with the Watchkeeper in restricted airspace over Salisbury Plain between 8,000 and 16,000 feet.^[16]

The British Army will receive 30 Watchkeepers and a further 24 machines due to go into store to be pulled into service as needed.^[17]

Deployment

On 29 September 2014, the MoD revealed that an undisclosed number of Watchkeepers had become fully operational and sent to Afghanistan. The aircraft were stationed at Camp Bastion to provide force protection for British troops as they drew down from Afghanistan towards the end of the year. There had been no prior indication that the Watchkeeper would be sent to Afghanistan before the NATO-led International Security Assistance Force completed its mission. The aircraft worked alongside Hermes 450s that it is derived from, although the Watchkeeper carries a twin payload of an electro-optical/infrared sensor and a synthetic aperture radar.^[18]

One system of four Watchkeepers was sent to Afghanistan in August 2014, performed its first in-theatre flight on 2 September, and conducted the first operational flight on 16 September. One mission had a Watchkeeper providing wide-area surveillance for U.S. Marines using its Thales I-Master radar, which then cued a Hermes 450 to continue tracking, which then passed the information on to a Royal Air Force MQ-9 Reaper to conduct an airstrike against a target. Some 140 flights were conducted for 8 hours a day until operations ceased in mid-October. One reason the WK450 was deployed so late in the conflict was to use its dual-mode synthetic aperture radar and ground moving target indication, which the Hermes 450 lacks, to identify Taliban fighters attempting to hide under the cover of dust storms; when the ground-based radar coverage at Bastion was switched off, the British Army stopped using the interim leased Hermes 450. Once operations in-theater ceased, the Watchkeepers were brought back to the UK. Full operational capability is to be achieved in 2017 with enhancements including de-icing features, rough strip capabilities, and others.^[4]

References

External links

Wikimedia Commons has media related to Thales Watchkeeper WK450.

• Official website
• Announcement of contract in the House of Commons, Hansard column 86WS, 20 Jul 2005
• UK Gives $1.23B Green Light to Watchkeeper UAV, Defense Industry Daily, 25 July 2005
• Watchkeeper bidders, Spyflight

Aircraft produced by Elbit Systems UAVs Silver Arrow Micro-V Silver Arrow Sniper Skylark I Skylark II Hermes 90 Hermes 180 Hermes 450 (Watchkeeper WK450) Hermes 900 Hermes 1500