In the Second World War people at home with loved ones spread far away around the world with the forces were fed a diet, often government backed, of “how it works” or “how we will win” technical information leaflets. Very often these would have contained superb cut away and sectioned diagrams, showing the “insides” or as was said at the time “the works!” of the machines that were winning the war for us!
http://www.cyber-heritage.co.uk/cutaway/
