Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 787
and locomotiveresistance. For an average freight-train movingabout ten miles per hour, the draw-bar pulf isbetween 80% and 90% of the tractive force. Foran average passenger express-train moving atfifty miles per hour, only about 30% of the rated ONE OF THE EARLY ATLANTICTYPE LOCOMOTIVES. Tthas a… … the relative powers as the locomotives have grownin size from the old-timers. TRACTIVE force Tractive force, or the force exerted by the loco-motive at the rim of the driving-wheel, forms a 1 Measured by instruments. 2 As the horse-powers of the two engines were about etits speed must have been…
Children's literature
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