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- A20 was a British tank design by Harland and Wolff to meet an Army requirement for an infantry tank that could replace the Matilda II and Valentine tank. It was designed in the expectation that conditions would be similar to those of the First World War. The specification was produced by Superintendent of Tank Design at Woolwich with design by the Mechanization Board and passed to Harland and Wolff for detail work and to build a pilot.Four pilots were ordered in February 1940. Two - A20E1 and A20E2 - were built. The first pilot took part in trials in June 1940. It was shipped from Northern Ireland to Vauxhall Motors (without a turret) in August; thereafter to at Farnborough. The Battle of France indicated that trench warfare was not going to be the case in the Second World War. A new specification, A22, was drawn up and Vauxhall who had been engaged to find a suitable power plant - their Bedford "twin six" engine - for the A20 were instructed to bring a tank based on the A20 into production as soon as possible. This would enter service as "Tank, Infantry, Mark IV" later named Churchill. The first pilot Churchill was finished by November 1940. The decision to cancel the order for 100 A20 was made in June 1940 and that the four pilot models - constructed of mild steel - would be used for component testing. After the MWEE, the A20E1 moved to the Experimental Bridging Establishment, Christchurch then back to Farnborough, this time to the Wheeled Vehicle Experimental Establishment. There it was used as trial load to test a twenty-wheel 70-ton capacity tank transporter trailer built by Cranes of Dereham. (en)
- A20重戦車（英語: A20 heavy tank）は、マチルダII歩兵戦車とバレンタイン歩兵戦車を代替する歩兵戦車を必要としたイギリス陸軍の要求に応えるため、ハーランド＆ウルフ社が開発した戦車（歩兵戦車、重戦車）である。 (ja)
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- QF 2-pounder in hull (en)
- QF 2-pounder (40 mm) in turret (en)
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- A20重戦車（英語: A20 heavy tank）は、マチルダII歩兵戦車とバレンタイン歩兵戦車を代替する歩兵戦車を必要としたイギリス陸軍の要求に応えるため、ハーランド＆ウルフ社が開発した戦車（歩兵戦車、重戦車）である。 (ja)
- A20 was a British tank design by Harland and Wolff to meet an Army requirement for an infantry tank that could replace the Matilda II and Valentine tank. It was designed in the expectation that conditions would be similar to those of the First World War. The decision to cancel the order for 100 A20 was made in June 1940 and that the four pilot models - constructed of mild steel - would be used for component testing. (en)
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- A20 heavy tank (en)
- A20重戦車 (ja)
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