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Builder Trials of the USS Oregon

One the first know photographs of the USS Oregon. underway. Here, she is conducting builders trials off the coast of California. It was during these trials that the Oregon set the fastest speed for the Indiana Class battleships. Notice that the forward thirteen inch turret has not been installed yet.

Credit: Oregon Historical Society, File #2160

Information concerning the Trials

 

Date of Trial.................................May 14, 1896

Duration of Trial...........................4 hours

Location of Trial...........................Santa Barbara Channel, off the coast of California

Weather and Sea Conditions........Calm sea with light breeze

 

Technical Data concerning the trial

Mean draft of Oregon..................24 feet

Displacement...............................10,250 tons

Engine Type.................................Vertical Triple Expansion

Cylinder, diameters

High pressure......................34.5 inches

Intermediate pressure..........48 inches

Low pressure......................75 inches

Stroke of Pistons..........................42 inches

Number and type of boilers...........4, double ended

Length of boilers..........................18 feet

Diameter of boilers.......................15 feet

Number of furnaces (each boiler)..8

Screw propellers

Diameter.............................15 feet

Pitch, mean.........................16 feet

Pitch, adjustable..................Between 15.5 and 16.5 feet

Number of Blades...............3 each propeller

 

Steam Pressure, psi;

 

 Starboard

Port

At engines, per gauge

156.5 

155.9

In first receiver, absolute

 82.1

82.2

In second, receiver, absolute 

35.3

36.1

 

Revolutions of Main engines, rpm;

Starboard............................128.3

Port.....................................128.2

 

Mean engine pressures, psi;

 

Starboard

Port

High pressure cylinder

59.6

60.8

Intermediate pressure cylinder

31.6

32.6

Low pressure cylinder

18.7

21.2

Equivalent on low pressure

44.2

47.4

 

Indicated horsepower (ihp);

 

Starboard 

Port

High pressure 

1486.2

1512.6

Intermediate pressure

1536.1

1586.8

Low pressure

2233.5

2537.2

Aggregate each main engine

5253.7

5636.6

Aggregate both main engines = 10,890.3

Air pump engines;

Starboard....................8.8

Port.............................7.7

Circulating pump engines;

Starboard....................51.5

Port.............................34.5

Feed pumps..........................44.4

Other Auxiliaries...................73.9

Aggregate of all machinery = 11,111.1

 

Speed in nautical miles...................16.79

Type of coal..................................Welsh

Total coal burned per hour..............23,593.5 lbs

Coal burned per hour per ihp..........2.1 lbs

 

Information derived from an article "Warship 1990", by William C. Emerson

 

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