LNER Class Y3
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The LNER Class Y3 was a class of 0-4-0 geared steam locomotives built by Sentinel Waggon Works for the London and North Eastern Railway and introduced in 1927. They passed into British Railways ownership in 1948 and were numbered 68154-68185.
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[edit] Overview
The vertical water-tube boiler and the engine were similar to those used in Sentinel steam waggons. Final drive to the wheels was by sprocket chain. Some locomotives had a sprocket gear ratio of 19:19 and others 15:19. In addition, there was a two-speed gearbox but gears could only be changed while the locomotive was stationary.
[edit] Dimensions
- Locomotive weight, 20 tons 16 cwt
- Boiler pressure, 275 psi
- Superheater, Yes
- Cylinders, 6.75"x9"
- Valve gear, Sliding camshaft (poppet valves)
- Sprocket gear ratio, 19:19 or 15:19
- Driving wheel diameter, 2' 6"
- Tractive effort:
- Ratio 19:19, Low gear 12,600 lb, High gear 4,705 lb
- Ratio 15:19, Low gear 15,960 lb, High gear 5,960 lb
[edit] Sources
- Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 47
[edit] External links
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