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DIVISION I.
ROAD LOCOMOTIVES FOR Pa.s.sENGER OR FREIGHT SERVICE.
CLa.s.s 27-1/2 C.
General Design Ill.u.s.trated by Prints on Pages 56 and 60.
CYLINDERS.
Diameter of cylinders 16 inches.
Length of stroke 22 or 24 inches.
DRIVING-WHEELS.
Diameter of drivers 56 to 66 inches.
TRUCK.
FOUR-WHEELED CENTRE-BEARING TRUCK, WITH SWING BOLSTER.
Diameter of wheels 24 to 30 inches.
WHEEL-BASE.
Total wheel-base 21 ft. 9 inches.
Rigid " (distance between driving-wheel-centres) 8 ft.
TENDER.
ON TWO FOUR-WHEELED TRUCKS.
Capacity of tank 2000 gallons.
WEIGHT OF ENGINE IN WORKING ORDER.
On drivers 42,000 pounds.
On truck 23,000 "
------ Total weight of engine, about 65,000 "
LOAD.
IN ADDITION TO ENGINE AND TENDER.
On a level 1000 gross tons.
" 20 ft. grade 460 " "
" 40 " 290 " "
" 60 " 205 " "
" 80 " 150 " "
" 100 " 120 " "
The distance between centres of drivers (rigid wheel-base) can be made 8 ft. 6 in., if preferred to 8 ft. as given above. This greater spread of wheels, throwing more weight on the drivers, gives the engine greater adhesion, and thus adds to its efficiency for freight service.
Owing to the peculiar construction of the truck, the engine is found to pa.s.s short curves without difficulty, even with this greater distance between driving-wheel-centres.
[Ill.u.s.tration: Locomotive.]
DIVISION I.
ROAD LOCOMOTIVES FOR Pa.s.sENGER OR FREIGHT SERVICE.
CLa.s.s 28 C.
General Design Ill.u.s.trated by Prints on Pages 56, 60, and 64.
CYLINDERS.
Diameter of cylinders 17 inches.
Length of stroke 22 or 24 inches.
DRIVING-WHEELS.
Diameter of drivers 56 to 66 inches.
TRUCK.
FOUR-WHEELED CENTRE-BEARING TRUCK, WITH SWING BOLSTER.
Diameter of wheels 24 to 30 inches.
WHEEL-BASE.
Total wheel-base 22 ft. 6-1/4 inches.
Rigid " (distance between driving-wheel-centres) 8 ft.
