Prime Mover

The Holt tractor was part of the US government’s bid to motorise their artillery in Europe during World War One, Tim Gosling reports

Towing a 155mm gun this Holt demonstrates how the radiator tubes were clamped into position in pairs making their replacement or repair quite straightforward
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The US Ordnance Department was forward thinking when considering the movement of artillery, declaring that “motorisation is the prime mover of the future” and that it had “numerous advantages over animal draft”. Having compared tracked vehicles with all other types of mechanical prime mover those with caterpillar tracks were found to have a “definite superiority” and were the “only logical prime mover” to replace horses.

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