Each boat we build is unique. our steam launch projects are always one-of-a-kind, featuring unique styles, colors and components. each engine is a work of art. Build a hobby sized steam engine . these plans are for a mini table top steam engine. although it is not a scale reproduction of any particular engine, it has the same general appearance and eye-taking appeal of the picturesque old-timers so hard at work about the turn of the century.. A steamboat is a boat that is propelled primarily by steam power, typically driving propellers or paddlewheels.steamboats sometimes use the prefix designation ss, s.s. or s/s (for ‘screw steamer’) or ps (for ‘paddle steamer’), however these designations are most often used for steamships.. the term steamboat is used to refer to smaller, insular, steam-powered boats working on lakes and rivers.