The Model #75 Steam Engine is Jensen's largest Dry fuel heated design. It is a Double acting Slide Valve engine with a Stephensen Reversing linkage with forward, reverse and neutral positions. This is a powerful engine and with lots of steam reserve for longer run times. For those who like to make steam the old fashioned way, with real open flame under the boiler, the Jensen Model #75 is as close to perfection as one can come; same as the model #25 except that it is designed to be dry fuel heated instead of heating electrically.