What is the mallard train?
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
Join Alexa Answers
Help make Alexa smarter and share your knowledge with the worldLEARN MORE