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What started as a brief thread on running gear rapidly got out of hand, so instead I’m doing a series of short threads on the major elements of tracked vehicle running gear design and the component parts, what variance there is and why. First a short introductory thread on tracks 
Usual disclaimer - this is Twitter, I don’t have much space and so some things are simplified or omitted for simplicity. This is a hugely complex science; I’m just giving a flavour of the considerations inherent in AFV design. With that out the way…
Continuous track dates to 1830s with one of the first patents being the ‘universal railway” invented by Sir George Cayley. In 1832 a tracked steam ploughing engine was built by British textile manufacturer John Heathcote and was moderately successful until it sank into a swamp.
