Hot air engines, often called Stirling engines, are among the most interesting & intriguing engines ever to be designed. They run on just about any fuel, from salad oil & hydrogen to solar & geothermal energy. They produce a rotary motion that can be used to power anything, from boats & buggies to fridges & fans. This book demonstrates how to design, build & optimise Stirling engines. A broad selection of Roy’s engines is described, giving a valuable insight into the many different types & a great deal of information relating to the home manufacture of these engines is included in the workshop section.ISBN: 978 1 86126 688 0 240 pages Hardback 246x 189 mm 400 colour photographs