Helena as outfitted during her last major overhaul period at Mare Island Navy Yard, June 1942.

GENERAL DATA 




Displacement:


Designed - 10,000 tons Standard

Completed -  10,569 tons 1939

Full Load -  13,309 tons 1939

Refitted -  14,219 tons 1942


Dimensions:


Length Overall -  607' 4-1/8"

Waterline Length -  600' (D.W.L. 11,790 tons)

Maximum Beam -  61' 7-1/2"

Draft at 13,309 tons -  24'1-1/2" (64.4 tons/in)


Armament 1942:


Main -  15 6-inch/47 in 5 X 3 turrets

Double Purpose - 8 5-inch/38 in 4 x 2 turrets

Antiaircraft - 16 40mm in 4 quad. mounts

12 20mm single mounts


Protection:


 Main Belt -  5" tapered to 3.25" (backed by 25 lb. sts) 9'3" wide frames 61-103 (covered by 80 lb. STS 3rd. D.K.)

Lower Belt Fwd. -80 lb. STS (backed by 25 lb. STS)

Lower Belt Aft. -  4.7" tapered to 3" (covered by 80 lb. 1st. Plat. Dk.)

Turrets -  6.5" face, 2" crown, 1.25" side drear/6" barbette

Conning Tower -  5", 2.25" crown, 60 lb. STS florr - removed 1942 refit.


Machinery:


Boilers -  8 B  & W, 618psi.

Engines -  4 Parsons Geared Turbines (New York Navy Yard)

Shaft Horsepower -  100,000 (4 shafts)

 Propellers -  4 three bladed, 11' 9-5/8" dis.

 Speed -  Trials 6/20/40 33,04 kts. (101,079 SHP) at 12,838 tons.

 Generators -  2 500 KW turbine, Ships Service. 2 500 KW diesel, Emergency Service.


Complement:


 Officer - 47

W/O - 16

Enlisted -  1,204


















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