Technical Details
There were three separate grates and ash pans, one on each side outside the frames and a third between, giving an aggregate area of 42 sq ft (3.90 m2). The trailing drivers were given a side play of 0.5 in (12.7 mm), the coupling rods being fitted with ball and socket joints. As the cranks of the three cylinders were set at 120 degrees in relation to each other, perfect balancing of the reciprocating parts was secured. In order to minimise the drivers slipping, compressed air sanders were fitted.
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