What’s the Greatest Machine of the Sentinel Steam Waggon?

STEAM POWERED WORKHORSE: the Sentinel Steam Waggon (1934) With a boiler pressure of 250 pounds per square inch (the same as a steam locomotive and five times as much as petrol lorries), the Sentinel Steam Waggon was well and truly the ’go to vehicle’ for the construction industry. Unlike conventional lorries, driving a Steam Waggon involved a baking hot fire in the cab - important to be kept constantly burning by shovelling in coal (as taken care of by the stoker). The vehicle would typically travel at around 50 mph a day for up to 100 miles, which would use a vast quantity of water in order to produce the necessary amount of steam. Extra water could be derived from nearby ponds and streams and sucked up with a hose - although in extreme circumstances the driver would need to seek alternate sources of water.