Railroad curvature and speed

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T
1	Chord length '	Base	Height	h/b	Inside angle rad	Angle deg	Deg/100'	Deg-min	Rad ft	Rad m	mph at 3"	mph at 4"	mph at 5"	mph at 6"	mph at 7"	mph at 8"	mph at 9"	mph at 10"

2	25	12.5	4.708	0.3767	0.3602	41.28	330.24	330° 14'	19	6	4	4	5	5	6	6	6	7	Standard Gauge
3	50	25	4.708	0.1883	0.1862	21.33	85.33	85° 20'	69	21	7	8	9	10	11	12	12	13	4.708	Standard gauge 4' 8.5"
4	75	37.5	4.708	0.1256	0.1249	14.31	38.17	38° 10'	152	46	11	12	14	15	16	17	18	19
5	100	50	4.708	0.0942	0.0939	10.76	21.52	21° 31'	268	82	14	16	18	20	22	23	24	26
6	125	62.5	4.708	0.0753	0.0752	8.62	13.79	13° 47'	417	127	18	20	23	25	27	29	31	32
7	150	75	4.708	0.0628	0.0627	7.18	9.58	9° 35'	600	183	21	24	27	30	32	35	37	39
8	175	87.5	4.708	0.0538	0.0538	6.16	7.04	7° 2'	815	249	25	28	32	35	38	40	43	45
9	200	100	4.708	0.0471	0.0470	5.39	5.39	5° 23'	1064	324	28	33	36	40	43	46	49	51
10	225	112.5	4.708	0.0419	0.0418	4.79	4.26	4° 16'	1346	410	32	37	41	45	48	52	55	58
11	250	125	4.708	0.0377	0.0376	4.31	3.45	3° 27'	1662	506	35	41	45	50	54	58	61	64
12	275	137.5	4.708	0.0342	0.0342	3.92	2.85	2° 51'	2010	613	39	45	50	55	59	63	67	71
13	300	150	4.708	0.0314	0.0314	3.60	2.40	2° 24'	2392	729	42	49	55	60	65	69	73	77
14	325	162.5	4.708	0.0290	0.0290	3.32	2.04	2° 3'	2807	855	46	53	59	65	70	75	79	84
15	350	175	4.708	0.0269	0.0269	3.08	1.76	1° 46'	3255	992	49	57	64	70	75	81	85	90
16	375	187.5	4.708	0.0251	0.0251	2.88	1.53	1° 32'	3736	1139	53	61	68	75	81	86	92	96
17	400	200	4.708	0.0235	0.0235	2.70	1.35	1° 21'	4250	1295	56	65	73	80	86	92	98	103
18	425	212.5	4.708	0.0222	0.0222	2.54	1.19	1° 12'	4798	1462	60	69	77	85	91	98	104	109
19	450	225	4.708	0.0209	0.0209	2.40	1.07	1° 4'	5378	1639	63	73	82	90	97	104	110	116
20	475	237.5	4.708	0.0198	0.0198	2.27	0.96	0° 57'	5992	1826	67	77	86	95	102	109	116	122
21	500	250	4.708	0.0188	0.0188	2.16	0.86	0° 52'	6640	2024	70	81	91	100	108	115	122	129
22	525	262.5	4.708	0.0179	0.0179	2.06	0.78	0° 47'	7320	2231	74	85	96	105	113	121	128	135
23	550	275	4.708	0.0171	0.0171	1.96	0.71	0° 43'	8033	2449	78	90	100	110	118	127	134	142
24	575	287.5	4.708	0.0164	0.0164	1.88	0.65	0° 39'	8780	2676	81	94	105	115	124	132	140	148
25	600	300	4.708	0.0157	0.0157	1.80	0.60	0° 36'	9560	2914	85	98	109	120	129	138	146	154
26	625	312.5	4.708	0.0151	0.0151	1.73	0.55	0° 33'	10373	3162	88	102	114	125	135	144	153	161
27	650	325	4.708	0.0145	0.0145	1.66	0.51	0° 31'	11219	3420	92	106	118	130	140	150	159	167
28	675	337.5	4.708	0.0140	0.0139	1.60	0.47	0° 28'	12099	3688	95	110	123	135	145	155	165	174
29	700	350	4.708	0.0135	0.0135	1.54	0.44	0° 26'	13011	3966	99	114	127	140	151	161	171	180
30	725	362.5	4.708	0.0130	0.0130	1.49	0.41	0° 25'	13957	4254	102	118	132	144	156	167	177	187
31	750	375	4.708	0.0126	0.0126	1.44	0.38	0° 23'	14936	4553	106	122	136	149	161	173	183	193
32	775	387.5	4.708	0.0122	0.0121	1.39	0.36	0° 22'	15948	4861	109	126	141	154	167	178	189	199
33	800	400	4.708	0.0118	0.0118	1.35	0.34	0° 20'	16994	5180	113	130	146	159	172	184	195	206
34
35			Derived from Ari Ofsevit's spreadsheet:
36			https://docs.google.com/spreadsheets/d/12TL8uums5MqgL5AVz0v08m-B6NeR13eoFjQIbl9Imqs/edit?gid=423576783#gid=423576783
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