Mallard is an A4 class locomotive designed by Sir Nigel Gresley.
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Mallard is an A4 class locomotive designed by Sir Nigel Gresley.
The A4s were built to power high-speed trains in the late 1930s, and their shape was honed in a wind tunnel to help them cut through the air as cleanly as possible—making speeds of 120mph and above possible. This powerful, aerodynamic masterpiece rocketed to 126mph in 1938, a steam speed record that was never surpassed. Source: https://www ...
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