Cruisers, Large (CB)
Index
As of 1 December 1944
Name No. Class Page Alaska CB 1 CB 1 Class 19 Guam CB 2 CB 1 Class 19 Hawaii CB 3 CB 1 Class 119
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DATA PERIOD 1944-1945 CB 1
ENDURANCE AND RADIUS CHART FOR WAR STEADY STEAMING
MEAN DISPLACEMENT: TONS
Fuel in Thousands of GallonsSHIPS IN CLASS:
CB 1-3
* See table V.
DATA PERIOD 1944-1945 CB 1 CLASS
Table I.--WAR LOGISTICS DATA FOR STEADY STEAMING
BASED ON RADIUS OIL*SHIPS IN CLASS
CB 1-3
PROP. SPEED FUEL RATE ENDURANCE SPEED RADIUS SPEED RADIUS FUEL RATE WORK COLUMN MEAN NORMAL RANGE DAILY Mean displacement 33,650 tons† Mean displacement 29,650 tons Mean displacement 33,650 tons† (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) R.P.M. Gal./hr. Gal./hr. Bbl./day Hours Day Knots Engine miles Knots Engine miles Gal./eng. mi. 100 1,379 1,224-1,546 788±34 818±9 34.1 12.9±0.1 10,680±270 12.8±0.1 10,470±260 107.7 13.0 10,400 108.4 110 1,570 1,394-1,760 897±39 719±8 30.0 14.2±.2 10,340±270 14.0±.2 10,070±260 112.1 15.0 9,670 116.7 120 1,788 1,587-2,004 1,022±44 631±8 26.3 15.4±.2 9,840±260 15.2±.2 9,590±250 117.6 16.0 9,260 121.9 130 2,036 1,808-2,282 1,163±50 554±7 23.1 16.6±.2 9,330±250 16.4±.2 9,090±250 124.1 17.0 8,870 127.3 140 2,318 2,058-2,598 1,325±57 487±7 20.3 17.9±.2 8,820±250 17.7±.2 8,620±250 131.0 18.0 8,480 133.2 150 2,639 2,343-2,958 1,508±65 427±6 17.8 19.1±.3 8,270±250 18.9±.3 8,070±250 139.6 19.0 8,030 140.4 20.0 7,600 148.7 160 3,004 2,667-3,367 1,717±74 376±6 15.7 20.4±.3 7,750±240 20.1±.3 7,560±240 149.5 21.0 7,160 157.8 170 3,421 3,037-3,834 1,955±85 330±6 13.8 21.6±.3 7,210±240 21.3±.3 7,030±240 160.6 22.0 6,730 167.9 180 3,895 3,458-4,365 2,226±97 290±5 12.1 22.9±.4 6,710±240 22.5±.4 6,520±240 173.1 23.0 6,310 178.9 190 4,435 3,937-4,971 2,534±110 254±5 10.6 24.1±.4 6,220±230 23.7±.4 6,020±230 187.1 24.0 5,890 191.6 200 5,050 4,483-5,660 2,886±125 223±5 9.3 25.2±.4 5,700±220 24.8±.4 5,530±220 203.6 25.0 5,450 206.9 210 5,751 5,106-6,445 3,286±143 196±4 8.2 26.3±.4 5,230±190 25.9±.4 5,080±190 222.0 26.0 5,040 223.9 220 6,549 5,814-7,340 3,742±162 172±4 7.2 27.4±.4 4,770±190 27.0±.4 4,640±190 242.6 28.0 4,280 263.3 230 7,458 6,621-8,359 4,262±185 151±4 6.3 28.5±.4 4,360±190 28.1±4 4,240±190 265.4 29.0 3,910 289.2 240 8,493 7,540-9,519 4,853±211 133±4 5.5 29.5±.5 3,980±190 29.1±.4 3,870±190 291.9 30.0 3,560 318.4 250 9,673 8,588-10,841 5,527±240 117±4 4.9 30.5±.5 3,600±190 30.1±.5 3,520±190 321.4 254 10,189 9,046-11,419 5,822±253 111±3 4.6 30.9±.5 3,460±160 ‡30.5±.5 3,390±150 334.1
† Mean displacement during data period.
‡ Estimated speed at designed shaft horsepower ( s.h.p.).
DATA PERIOD 1944-1945
CB 1 CLASSSHIPS IN CLASS:
CB 1-3
Table II.--WAR LOGISTICS DATA: UNDERWAY AVERAGES
* Based on radius oil; see table V.
Average speed Fuel rate Endurance* R.P.M. Knots Bbl./day Days 138.4 17.5 1,453±310 18.5±1.3
Table III.--WAR LOGISTICS DATA: NOT UNDERWAY
*Based on radius oil; see table V.
Fuel rate Endurance* Gal./hr. Bbl./day Days 355 203 132.4
Table IV.--PROPELLER SPECIFICATIONS
Note.--All underway data are based on the propellers specified below.
In the case of ships whose propellers do not conform to these specifications,
see discussion of table IV in Introduction.In case of a propeller change see discussion of table IV in Introduction.
Number of propellers Number of blades Diameter Pitch 2 Inboard 4 14'4" 15'1" 2 Outboard 4 14'4" 15'7"
Table V.--FUEL CAPACITIES
Capacity Gallons Barrels Tons "Full load" fuel oil capacity§ 1,020,745 24,303 3,685 Diesel oil capacity (95%) 107,388 2,557 342 Total: radius oil* 1,128,133 26,860 4,027 Additional fuel oil required to fill all tanks to 95% (emergency) 6,925 165 25 Total: maximum capacity (95%)† 1,135,058 27,025 4,052
§ Based on considerations of cruising radius and power of survival as affected by reserve buoyancy.
* In tables I, II, and III endurance and radius are based on radius oil.
† In table IA endurance and radius are based on maximum capacity (95%).Conversion factors:
Diesel oil: 314 gallons = 1 ton. Fuel oil: 277 gallons = 1 ton. Diesel oil and fuel oil: 42 gallons = l barrel.
Table IA.--WAR LOGISTICS DATA FOR STEADY STEAMING
BASED ON MAXIMUM CAPACITY (95%)
Note.--Fueling beyond the radius oil capacity increases radius at the expense of resistance
to underwater damage. This table is made available to the commander as a supplement to table I
for use when increased radius and decreased resistance to underwater damage are factors in a decision.
* See table V.
Speed Radius Endurance Fuel rate Mean displacement 33,650 tons Knots Engine miles Days Bbl./day 13 10,460 33.6 806 14 10,130 30.2 897 15 9,730 27.1 1,001 16 9,320 24.3 1,116 17 8,920 21.9 1,238 18 8,530 19.8 1,371 19 8,080 17.7 1,525 20 7,650 16.0 1,700 21 7,200 14.4 1,896 22 6,770 12.9 2,113 23 6,350 11.6 2,354 24 5,930 10.3 2,630 25 5,480 9.2 2,959 26 5,070 8.1 3,327 27 4,670 7.2 3,742 28 4,310 6.4 4,215 29 3,930 5.6 4,794 30 3,580 5.0 5,460
Table VI.--STEADY STEAMING MEAN FUEL RATE RATIOS*
Ship Average displacement Fuel rate ratio--ship: Class 100 R.P.M. 150 R.P.M. 200 R.P.M. 250 R.P.M. Tons Percent Percent Percent Percent U.S.S. Alaska CB 1 33,800 96.1 98.5 101.0 103.5 U.S.S. Guam CB 2 33,500 103.9 101.5 99.0 96.5 * Table VI is used to adjust the class data in tables I and IA to individual ships.
The ratios were obtained by dividing the steady steaming mean fuel rates of the indicated ships
by the corresponding mean fuel rates given in column (2) of table I.
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