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For what inventions used during World War II did British aviation engineer Barnes Wallis, later knighted, become famous?

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AA dynamo-powered torch
BBombs, and adaptation of aircraft to take them
CJerrycan
DPressurised aircraft cabins

Correct Option: 2  

Explanation:
Bombs, and adaptation of aircraft to take them
Among Wallis's inventions were the bouncing bombs used in the Dambusters raid in May 1943 against dams in the Ruhr Valley, and the heavy bombs plus the adaptation of the Avro Lancaster used to sink the "Tirpitz". The jerrycan was a German invention and so superior to the Allied version that they became prized loot.
posted Mar 6, 2018 by Rahul Chandel

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