296 
The N.Z. Journal of Science and Technology. 
[Jan. 
Table I. —Summary of Locomotive Tests, Christchurch-Timaru Express Service. 
Ab 60S, Simple Superheated ; Weight, 75 tons. 
(13th to 17th December, 1915.) 
Trip.* 
Gross 
Ton- 
mileage. 
Actual 
Run¬ 
ning¬ 
time. 
Per Round Trip. 
Per Ton-mile. 
Weather. 
Water. 
Coal. 
Water. 
Coal. 
S. 
N. 
S. 
N. 
S. 
N. 
S. 
N. 
S. 
N. 
Average 
25.100 
34,900 
26,800 
30.200 
27,500 
34,700 
33,400 
31.200 
35.200 
33.100 
Minutes 
179 
165 
176 
167 
177 
162 
157 
179 
171 
165 
lb. 
j 50,000 
j 48,000 
| 49,500 
| 51,000 
J 49,000 
lb. 
5,544 
5,576 
5,488 
5,600 
5,432 
lb. 
•833 
•842 
•796 
•790 
•717 
lb. 
•092 
•098 
•088 | 
•087 
•079 
Calm. 
Light N.E. 
Calm. 
Light N.E. 
Strong N.W. 
Calm. 
31,210 
170 
49,500 
5,488 
•793 
•088 
A 399, Compound Saturated; Weight, 69 tons. 
(10th to 14th January, 1916.) 
Trip.* 
Gross 
Ton- 
mileage. 
Actual 
Run¬ 
ning- 
time. 
Per Round Trip. 
Per Ton-mile. 
Weather. 
Water. 
Coal. 
Water. 
Coal. 
S. 
N. 
S. 
N. 
S. 
N. 
S. 
N. 
S. 
N. 
Average 
36,500 
32.100 
39,600 
34.100 
f 32,700 
t37,100 
f 33,100 
132,100 
29.100 
30,400 
Minutes 
178 
165 
174 
166 
175 
168 
155 
173 
184 
164 
lb. 
] 68,000 
j 69,000 
] 72,009 
] 70,000 
| 62,500 
lb. 
8,176 
8,400 
9,396 
9,408 
7,840 
lb. 
•991 
•936 
1-03 
107 
1-05 
lb. 
•119 
•114 
*3.35 £ 
•144 
•132 
Calm. 
Calm. 
Strong N.W. 
Light N.E. 
Strong N.W. 
Calm. 
32,960 
172 
66,500 
8,133 
1-007 
•123 
* S = Christchurch-Timaru. N = Timaru-Christchurch. f Not counted in average, strong wind. 
Coal per engine-mile 
Coal per ton-mile 
Water per engine-mile 
Water per ton-mile 
Ton-miles per pound coal 
Ton-miles per pound water 
212° F. per pound coal.. 
Ab 608. 
A 399. 
(lb.) . 
27-44 
40-66 
(lb. l 
0-0880 
0-1232 
(lb.) 
247-5 
332-5 
(lb.) 
0-793 
1-007 
11-38 
8-114 
1 at 
12-60 
9-925 
• » 
11-96 
9-87 
Ab 608 saves 33 per cent, coal and 20 per cent, water over A 399 
Coal accurately weighed and water measured by meter. 
