Handbook of Railroad Construction; For the use of American engineers. / Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States.

by George L. Vose

FORMULA.

6T.

Example.

Required traction 5,000 lbs.; upon driving axles the weight is 5000 × 6 = 30,000 lbs.

368. Table 3. Giving the weight which should be placed upon the driving axles to secure any amount of adhesion; the latter being one sixth of the weight.

Required traction.	Weight in pounds.	Weight in tons.
500	3000	1.34
1000	6000	2.69
2000	12000	5.36
3000	18000	8.04
4000	24000	10.80
5000	30000	13.40
6000	36000	16.07
7000	42000	18.75
8000	48000	21.43
9000	54000	24.11
10000	60000	26.80
12000	72000	32.14
14000	84000	37.50
16000	96000	42.86
18000	108000	48.22
20000	120000	53.60

FORMULA.

2S
c.

Where S = stroke.

c = circumference of wheel, (both in inches.)