302 RUDDER TRIALS, U. S. S. STERETT. 



Beam at load water-line 26 ft. ^ in. 



Beam extreme on guards 27 ft. o in. 



Draught to normal load water-line 8 ft. 4 in. 



Corresponding displacement 743-5 tons. 



Wetted surface to load water-line 7,800 sq. ft. 



Area of midship section to load water-line 144-96 sq. ft. 



Area of load-water plane 5,030 sq. ft. 



Tons per inch immersion at load water-line 11.9 tons. 



Coefficient of fineness (block) -4142 



Coefficient of fineness (midship section) 666 



Coefficient of fineness, load water-line 649 



Estimated tactical diameter (preliminary accept- 

 ance trials) 650 to 675 yds. 



Engines. 



Type 7 2 -inch, 14-stage Curtis marine turbines. 



Number Two (out turning). 



Boilers. 



Type Yarrow water-tube. 



Number Four. 



Total heating surface 18,000 sq. ft. 



Propellers. 



Type True screw, solid. 



Material Monel metal. 



Number Two. 



Diameter 6 f t. 6| in. 



Mean pitch, starboard 75-69 in. 



port 75-54 in- 



Helicoidal area 21.06 sq. ft. 



Projected area 18.21 sq. ft. 



Performance on Standardization Trial, November J, igio. 



Speed (average of high-speed runs) 31-633 knots. 



Draught (middle of high-speed runs) 8 ft. ^A in. 



Corresponding displacement (4^ in. trim by 



stem) 741 tons. 



S. H. P. of main engines (average of high-speed 



runs) 14,5 15 calculated. 



