TRANSPORTATION ON LAND BY VEHICLES:— THE VEHICLES 



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Class A Shay locomotive. Lima Locomotive Works, Lima, Ohio. 



of the two trucks are gearwheels and all are drivers. The only connection of the 

 trucks with the main frame is through the center plates, so that the trucks can adjust them- 

 selves to rough and curved tracks. The crank is either douljle-throw or three-throw. Twelve 

 to eighteen impulses are required per revolution of the drivers. The crankshaft turns the 

 driveshaft extending outside the wheels from the foremost to the rearmost of the right-hand drivers. 

 All friction parts are readily accessible. The driveshaft may be extended so as to turn also 

 the eight wheels of the tender. The flexibility of the driveshaft is secured by a series of scab- 

 bards which, joining the sections of the driveshaft, allow them a large amount of play. Thus, 

 when a left-hand curve is made, the driveshaft is lengthened, and when a right-hand curve is 

 made, the driveshaft is shortened. The boiler pressure runs from 150 lbs. in the small to 200 lbs. 

 in the largest Shays. A 20-ton Shay can make curves of 50 feet, and a 50-ton Shay can 

 make curves of 100 feet radius. Oil is practicable, and after Pacific experiences with a daily 

 outlay of :V8'60 for a 45 -ton oil -fed Shay even cheaper than wood. 



A ,. -1^ 



Class C Shay locomotive. Lima Locomotive Works, Lima, Ohio. 



