The book "Miniature Ringbom Engines" is a practical introduction to a whole branch of Stirling engine technology. The Ringbom engine is a hot air engine with a normal crank-coupled piston but with a displacer free of any mechanical linkage. The displacer is driven automatically by changing pressure within the engine. This makes the Ringbom an utterly fascinating engine to see in operation and opens up a wide new world of possible configurations for Stirling engines. This first ever book on miniature Ringbom engines is primarily a how-to work, focused on presenting information and ideas for making working engines. Detailed plans and instructions for making three different model Ringbom engines are at the core. These include include a tine engine that runs at high speed on a small flame, and a larger Ringbom which can run for hours on the thermal energy in a few cups of hot water. The book starts with the advanced engine design and a large collection of new engine ideas to explore. This is Dr. Senft's most recent book and is a must for anyone interested in exploring this very interesting facet of Stirling engine development. 114 page soft cover 5" by 7"
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