The Johnston Geared Locomotives.

Updated: 3 Mar 2003
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Above: A Johnston 16-wheeler. The two-cylinder engine is mounted vertically at the rear of the cab.

The Johnston 16-wheelers were used for logging in New Zealand, running on wooden rails. This version, with four powered bogies, was built under a Patent issued in 1909. It resembled a Shay in having a vertical engine, but the drive shafts and the many universal joints required were more tidily placed between the frames.

Presumably this is denoted as a 2-2-2-2-2-2-2-2, or possibly a 2-2 + 2-2 + 2-2 + 2-2. I would happy to hear from those with strong opinions on this point.

At least 16 were built between 1910 and 1937.

Above: The drive shafting of the Johnston. Drawing taken from the original Patent.

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