Engineers use the resulting diagram to check the design and performance of the engine. This is a replica of the original steam indicator invented in the late 18th Century by James Watt of Scotland.

At 180 horsepower and peak torque of 850 pound-feet--at 1 rpm--the engine promises to deliver a steam-powered speed record with a marriage of old and new technology.

Scientists create "the world's smallest steam engine" By James Holloway December 15, 2011 Principle of the microscopic engine (Diagram: University of Stuttgart) View 1 Images ...

Miscellany Published: 30 November 1929 Steam and other Engines Nature 124, 834–835 (1929) Cite this article ...