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

25 × 5280
4 × 3.1416 × 4 = 37348

371. Table 6. Showing the hourly consumption of steam in terms of the capacity of one cylinder, with wheels from three and a half to eight feet, and speeds from ten to sixty miles per hour.

Wheel.	Wheel in inches.	Revolutions per mile.	NUMBER OF CYLINDERS PER HOUR AT A VELOCITY OF
			10	12	15	20	25	30	40	50	60
3½	42	480	19200	23040
3¾	45	449	17960	21552	26940
4	48	421	16840	20208	25260	33681
4¼	51	397	15880	19056	23820	31760	39700
4½	54	373	14920	17904	22380	29840	37300
4¾	57	361	14440	17328	21660	28880	36100
5	60	336			20160	26880	33600
5½	66	306			18360	24480	30600	36720
6	72	281				22480	28100	33720	44960
6½	78	259				20720	25900	31080	41440	51800	62160
7	84	240				19200	24000	28800	38400	48000	57600
7⅛	90	224					22400	26880	35840	44800	53760
8	96	211					21109	25320	33760	42200	50640

FORMULA.

D² × .7854 × Stroke
1728 = C.

Example.

Cubic content of a cylinder 15 × 24 is

15 × 15 × 0.7854 × 24
1728 = 2.44 cubic feet.

372. Table 7. Capacity of cylinders in cubic feet of from ten to twenty-four inches in diameter, and from eighteen to thirty-six inches stroke.

Diam. of cyl’r.	CAPACITY OF CYLINDERS IN CUBIC FEET, STROKE BEING										Diam. of cyl’r.
	18	20	22	24	26	28	30	32	34	36
10	082	091	100	109	118	127	136	145			10
11	093	104	115	126	137	148	159	170	181		11
12	118	131	144	157	170	183	196	209	222	235	12
13	133	149	165	181	197	213	229	245	261	277	13
14	160	178	196	214	232	250	268	286	304	322	14
15	184	204	224	244	264	284	304	324	344	364	15
16	208	232	255	278	301	324	347	370	393	416	16
17	235	263	289	315	341	367	393	419	445	471	17
18	263	294	323	352	381	410	439	468	497	526	18
19			361	394	427	460	493	526	559	592	19
20			400	437	474	511	548	585	622	659	20
21				481	521	561	601	641	681	721	21
22				528	572	616	660	704	748	792	22
23					625	674	723	772	821	876	23
24					681	733	785	837	889	941	24