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British Industrial History

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Darlington Works: No. 1269

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1874.


A bogie passenger engine designed and built by Mr. William Bouch, at the North-road Engine Works, Darlington Works, in November, 1874, for working passenger trains on the steep gradients between Darlington and Tebay.

Its boilter is 10ft. long by 4ft. diameter, made of Low Moor plate 7/16 ths in. thick, butt-jointed, and put together with hoops and four zigzag rows of rivets. The rivet boles are all drilled instead of being punched. It has a copper fire-box, 6ft. 9in. high, 4ft. 5in. long, by 3ft. 10in. w1de. It contains 210 Low Moor iron tubes 1 ?/4in . diameter, giving it a total heating surface, including the fire-box, of 1217 square feet. The two outside cylinders are 17in. diameter and 30in. stroke. The slide valves are pistons, 13in. diameter, worked by eccentrics and expansion links, and fitted with patent screw-reversing gear, first designed and applied by Mr. William Bouch at the North-road Engine Works, in December, 1864.

There are four driving wheels coupled, each 7ft. diameter, and a four-wheeled bogie, each wheel 3ft. 6in. diameter, the total wheel-base being 21ft. The engine is fitted with Bouch's patent steam retarder, which acts on the cylinder pistons as a brake; there is also a handscrew brake on the trailing wheels.

The boiler pressure is 140 lb. per Square inch, and the engine can attain a speed of sixty miles per hour with about fourteen passenger carriages, the total we1ght of the engine in working order being 42 tons. The consumption of fuel is about 2 lb. per mile. The tender attached to this splendid engine has six wheel each 4ft. diameter, with Monk Bridge weldless iron tires, the total wheel-base being l0ft. It has two iron frames, each 16ft. 4in. long by 3ft. broad and 3/4in. thick, fitted w1th six carrying springs hung underneath the axle boxes. The tender is made of 3/4in. plate, and will carry 2400 gallons of water and 6 tons of fuel. The weight of the tender in working order is 23 tons. It is fitted with an ordinary screw brake, and a wood block on each wheel.[1]

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Sources of Information

  1. The Engineer 1875/09/24