![]() There are a number of specialised variants of the Chieftain which are still in service with the British Army. 8A diesel, which generates 750hp and is coupled to a TN12 transmission. A 7.62mm L8A1 machine gun is mounted coaxially with the main gun and a 7.62mm 元7A1 machine gun is mounted on the commander cupola. In the 1970s, British Army Chieftains were fitted with the Thermal Observation and Gunnery Sight (TOGS - which was also fitted to the Challenger), GEC-Marconi fully integrated Improved Fire Control System, Stillbrew armour and the No. ![]() The Chieftain mounts a Royal Ordnance 120mm L11A5 rifled gun fitted with a Pilkington Optronics laser rangefinder. The driver sits at the front of the hull, with the loader on the left and commander and gunner on the right of the turret. The hull of the Chieftain is made of cast and rolled steel sections welded together. 15s (named Qayd Al Ardh) in the mid-1980s. Oman also bought a number of Chieftain Mk. The British Army eventually accepted the Shir 2 for service as the Challenger. Jordan however, ordered the Shir 1 under the name Khalid, which had a number of modifications including a new Perkins Engines Company Condor V-12 1200 diesel (1,200hp), a David Brown Defence Equipment TN37 transmission and a Howden Aircontrol cooling system. Subsequent to this, in 1974 Iran ordered 1,225 Shir 2s, but as an interim measure ordered 125 Shir 1s but the order was cancelled in 1979 after the Islamic Revolution. Iran also took delivery of some 187 improved Chieftains, designated the FV4030/1 which carried more fuel, had improved mine protection and additional shock absorbers as well as electronic control of the David Brown Defence Equipment TN12 transmission. 5/3(P)) with a number of armoured recovery vehicles and bridgelayers. Around 900 Chieftains were built for the British Army with production being completed in the early 1970s. Two production lines for the Chieftain were set up, the first at the Royal Ordnance factory in Leeds (bought by Vickers in 1986), and the second, at the Vickers' plant at Elswick. The Chieftain was accepted for service in 1963 and entered service in 1967 with the 11th Hussars and 17/21 Lancers. Two prototypes of the new Chieftain went over to Germany in December 1962 to commence trials there. A further six prototypes had been built by April 1962 and during that year crews from the 1st and 5th Royal Tank Regiments came from Germany to help test the new vehicle. ![]()
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