Train count table
You can use this chart to calculate the length of missing pendulums, and for
calculating tooth counts etc. The pendulum length is from the top of the
suspension (the pivot point) to the centre of mass of the bob.
A= Centre Wheel
B= Third Wheel
C= Third Wheel
Pinion
D= Escape wheel
E= Escape Wheel
Pinion
F= Vibrations per
minute
G= Pendulum lenght in
inches
H= Pendulum length in mm
A |
B |
C |
D |
E |
F |
G |
H |
128 |
120 |
16 |
30 |
16 |
60.0 |
39.14 |
994.2 |
112 |
105 |
14 |
30 |
14 |
60.0 |
39.14 |
994.2 |
96 |
90 |
12 |
30 |
12 |
60.0 |
39.14 |
994.2 |
80 |
75 |
10 |
30 |
10 |
60.0 |
39.14 |
994.2 |
64 |
60 |
8 |
30 |
8 |
60.0 |
39.14 |
994.2 |
68 |
64 |
8 |
30 |
8 |
68.0 |
30.49 |
774.4 |
70 |
64 |
8 |
30 |
8 |
70.0 |
28.75 |
730.3 |
72 |
64 |
8 |
30 |
8 |
72.0 |
27.17 |
690.1 |
75 |
60 |
8 |
32 |
8 |
75.0 |
25.05 |
636.3 |
72 |
65 |
8 |
32 |
8 |
78.0 |
23.15 |
588.0 |
75 |
64 |
8 |
32 |
8 |
80.0 |
22.01 |
559.1 |
84 |
64 |
8 |
30 |
8 |
84.0 |
19.97 |
507.2 |
86 |
64 |
8 |
30 |
8 |
86.0 |
19.06 |
484.1 |
88 |
64 |
8 |
30 |
8 |
88.0 |
18.19 |
462.0 |
84 |
78 |
7 |
24 |
7 |
89.1 |
17.72 |
450.1 |
80 |
72 |
8 |
30 |
8 |
90.0 |
17.39 |
441.7 |
84 |
78 |
7 |
21 |
7 |
93.6 |
16.08 |
408.4 |
94 |
64 |
8 |
30 |
8 |
94.0 |
15.94 |
404.9 |
84 |
78 |
8 |
28 |
8 |
95.5 |
15.45 |
392.4 |
108 |
100 |
12 |
32 |
10 |
96.0 |
15.28 |
388.1 |
84 |
84 |
9 |
30 |
8 |
98.0 |
14.66 |
372.4 |
84 |
78 |
7 |
22 |
7 |
98.0 |
14.66 |
372.4 |
84 |
78 |
8 |
29 |
8 |
98.9 |
14.41 |
366.0 |
80 |
80 |
8 |
30 |
8 |
100.0 |
14.09 |
357.9 |
85 |
72 |
8 |
32 |
8 |
102.0 |
13.54 |
343.9 |
84 |
78 |
8 |
30 |
8 |
102.4 |
13.44 |
341.4 |
84 |
78 |
7 |
23 |
7 |
102.5 |
13.40 |
340.4 |
105 |
100 |
10 |
30 |
10 |
105.0 |
12.78 |
324.6 |
84 |
78 |
8 |
31 |
8 |
105.8 |
12.59 |
319.8 |
84 |
78 |
7 |
24 |
7 |
107.0 |
12.30 |
312.4 |
96 |
72 |
8 |
30 |
8 |
108.0 |
12.08 |
306.8 |
84 |
78 |
8 |
32 |
8 |
109.2 |
11.82 |
300.2 |
88 |
80 |
8 |
30 |
8 |
110.0 |
11.64 |
295.7 |
84 |
77 |
7 |
25 |
7 |
110.0 |
11.64 |
295.7 |
84 |
78 |
7 |
25 |
7 |
111.4 |
11.35 |
288.3 |
84 |
80 |
8 |
32 |
8 |
112.0 |
11.22 |
285.0 |
84 |
78 |
8 |
33 |
8 |
112.2 |
11.15 |
283.2 |
96 |
76 |
8 |
30 |
8 |
114.0 |
10.82 |
274.8 |
115 |
100 |
10 |
30 |
10 |
115.0 |
10.65 |
270.5 |
84 |
78 |
7 |
26 |
7 |
115.9 |
10.49 |
266.4 |
96 |
80 |
8 |
30 |
8 |
120.0 |
9.78 |
248.4 |
84 |
70 |
7 |
30 |
7 |
120.0 |
9.78 |
248.4 |
84 |
78 |
7 |
27 |
7 |
120.3 |
9.73 |
247.1 |
90 |
84 |
8 |
31 |
8 |
122.0 |
9.46 |
240.3 |
84 |
78 |
7 |
28 |
7 |
124.8 |
9.02 |
229.1 |
100 |
80 |
8 |
30 |
8 |
125.0 |
9.01 |
228.9 |
90 |
84 |
8 |
32 |
8 |
126.0 |
8.87 |
225.3 |
100 |
96 |
10 |
40 |
10 |
128.0 |
8.59 |
218.2 |
84 |
78 |
7 |
29 |
7 |
129.3 |
8.42 |
213.9 |
100 |
78 |
8 |
32 |
8 |
130.0 |
8.34 |
211.8 |
84 |
77 |
7 |
30 |
7 |
132.0 |
8.08 |
205.2 |
84 |
78 |
7 |
30 |
7 |
133.7 |
7.90 |
200.7 |
90 |
90 |
8 |
32 |
8 |
135.0 |
7.73 |
196.3 |
84 |
78 |
7 |
31 |
7 |
138.2 |
7.38 |
187.5 |
Repairing Your Own Clocks by Mervyn Passmore
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