Test prop jaw

The Shay , Climax and Heisler locomotives, all introduced in the late 19th century, used quill drives to couple power from a centrally mounted multi-cylinder engine to each of the trucks supporting the engine. On each of these geared steam locomotives , one end of each drive shaft was coupled to the driven truck through a universal joint while the other end was powered by the crankshaft , transmission or another truck through a second universal joint. A quill drive also has the ability to slide lengthways, effectively varying its length. This is required to allow the bogies to rotate when passing a curve.

Test prop jaw

test prop jaw


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