This richly illustrated manual is a comprehensive yet practical guide to the installation, operation, and maintenance of propulsion systems for scale model ships. Beginning with model and propulsion system options, the author goes on to describe both electric and steam systems, including the fitting and care of battery packs, radio controls and the operation of steam boilers, with an emphasis on safety when dealing with pressurized containers. Paddle-wheels and screw propellers are covered as well as such specialized propulsion units as variable-pitch propellers, azimuth thrusters, and Voith Schneider units Lavishly illustrated with photographs and the author's own technical line drawings and complemented by the inclusion of data tables and appendixes with addresses of suppliers of materials and equipment this eminently practical and useful handbook is indispensable reading for all working ship modelers.