68 DESCRIPTION AND TRIAL OF THE 
After the progressive trials a two-hour run was made, on which the oil con- 
sumption was measured by sounding the fuel oil tanks. The speed obtained was 
19.7 knots and the oil consumed was 669 gallons. Taking the shaft horse-power 
from the curves at 1,510 and assuming a specific gravity of .88 for the oil, this would 
give about 1.625 pounds of fuel oil per shaft horse-power per hour. 
I would like to call attention to the picture (Plate 52) which was taken during 
one of the high-speed runs. The bow wave here is not very high and consists of a 
very thin sheet of water, as the painted water-line on the ship’s sides can be plainly 
seen through it. The trim of the vessel at this speed is changed very little from that 
at rest. Had more power been supplied, no difficulty would have been experienced in 
obtaining very much higher speed; this is substantiated by the tank trials of the 
model. 
It might be of interest to compare the preceding Winchester with the present 
one, which is best done by looking over the following table:— 
Winchester No. 1 | Winchester No. 2 | Winchester No. 3 | Winchester No. 4 
Present name ......... Adroit Blying# Roxen |teeetaclereene Winchester 
E\elboo oococncceccs 140’ 0” 165’ 0” 205’ 0” 224/ 0” 
Beamerrerricreieieern: 15/ 6” 16/ 0” 18’ 6” 21’ 0” 
Trial draught......... 5/ 0” 3/1034” 3/11%” 4/1147 
Trial displacement .... 150 tons 136.3 tons 207.5 tons 322 tons 
Machinery ........... Reciprocating Parson’s turbines | Parson’s turbines | Parson’s turbines 
Number of propellers. . . 
2 
About 1500 I.H.P. 
About 20 knots 
3 
About 3000 S.H.P. 
26.516 knots 
2 
About 7000 S.H.P. 
32.24 
2 
8074 S.H.P. 
31.56 
