The authors cover the application of flash steam to transport and describe a home build steam car. They also cover other applications such as the model locomotive and Sentinel Railcar, however, they have concentrated on the use of flash steam in model boats and hydroplanes. They have approached the subject in a scholarly and lively fashion, and their work will go a long way to meet the demands of those who are responsible for the current revival of interest in the subject. First published in 1973 and now reprinted.