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قراءة كتاب Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

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Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

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دار النشر: Project Gutenberg
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are hauled over these two portions by the same engines, the results are virtually identical, the maxima furnishing two more points closely coinciding with the author's diagram.

TABLE 2.—Tractive Force, Catawissa to Lofty.

Length of grade, in miles   34.03
Grade in feet per mile   31.47
percentage A 0.597
Resistances, in pounds per 2,000 lb.,
Gravity (=20 A) = 11.94. Friction = 4.70		 B 16.64
Load: Cars. Locomotive. Tender.
Maximum[E] 1,561 44.60 25.25
Minimum[F] 1,031 60.50 34.50
   
C 1,631
C 1,126
Traction (= B C ÷ 2,000) Maximum[E] D 13.60
Minimum[F] D 9.38
Weight on Drivers: Locomotive. Helper.
Maximum[E] 21.60 63.00
Minimum[F] 47.00 72.00
   
E 84.60
E 119.00
Percentage ( = D ÷ E ).    
Maximum F 16.1
Minimum F 7.9

[E] Giving maximum values of percentage, F.

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