Bourke engine

The Bourke engine was designed by Russell Bourke in the late 1930s, who endeavored to improve upon the Otto cycle engine. Despite finishing his design and building several working engines, bad luck (onset of World War II) and bad health compounded to prevent his engine from ever coming to market. This engine was in pre-production by Hudson Motor Car Company (now know as American Motors). Well into the 2000's there are several small groups extolling the virtues of the design and engines in testing.

Russell Bourke's Vertical Crankshaft 30 Cubic Inch Engine (serial#1). Mounted on a 2:1 Gear Reduction Unit on Roger Richard's Test Stand.

Overview

The Bourke engine has two opposed cylinders with the pistons in a Scotch Yoke mechanism. Because the motion of the pistons is a perfect sine wave with regards to time vs displacement the fuel burns in a smaller volume. The use of the Scotch Yoke reduces vibration from the motions of the connection rod — for example calculations show, the peak acceleration in a Scotch yoke is 25% less than the acceleration in a conventional crank and slider arrangement, with a conrod to stroke ratio of 1.57, which is about the minimum seen in practice. The intake valves are replaced by ports reducing the number of parts.

Bourke engine - Bourke engine critique - Bourke engine design features - Bourke engine operation - Bourke engine performance

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