Triple expansion engines were basically only ever used commercially in ships and pumping/compressor stations, as it is not particularly efficient when operating outside a fairly narrow power envelope. Uniflow and Corliss engines were preferred when dealing with varying loads. A large steeple compoun...

Uniflow engines are interesting to me because they offer the opportunity to build an relatively simple, compact and yet efficient engine. My long-term steamboat goal is a ~35 foot steamer suitable for three season use in the San Juan Islands in Washington, where my wife and I plan to retire. My brot...