Malone Engine
From Graces Guide
The Malone engine was invented and patented by John Fox Jennens Malone (1880-1959) of Newcastle.
The engine used high temperature liquid as its working fluid, and was also referred to as the Hot Water Engine. A US patent, describing it with Mercury or an Mercury-Lead Alloy as working fluid, was granted in 1924.
Malone's first 50 hp prototype was completed in 1925, and used coal to heat high pressure water sealed inside a cylinder. Malone's second prototype, demonstrated in 1931, also produced 50 hp but in a much smaller design.
The engine worked on a modified version of the Stirling Cycle.
The above information is condensed from the Wikipedia entry.
See the Douglas Self website for more information and excellent drawings.
See Also
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