-H.M.S. Hood Technical Specifications & Armament Information-
Assorted Machinery & Other Systems
Updated 06-May-2014

H.M.S. Hood and warships in general, are complex machines made up of and/or supporting many smaller machines. Each served a specific or otherwise important purpose. We'll take brief look at examples of these "other machines" here.

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Electrical Generators
The ship was fitted with eight dynamos. Two were powered by 8 cylinder diesel engines, two by high speed impulse turbine engines and four by reciprocating engines. The generators could supply either AC or DC power as required.

Electric Motors
Hood had a variety of motors for everything from ventilation to boat hoists. It is estimated that she containted around 360 motors. The power range of the motors depended on their intended usage - small ventilation fans could use a ¼ hp motor, whereas, the aforementioned boat hoists required motors of 140bhp.

Hood was equipped with 100 ton submersible pumps to combat flooding. For fire prevention and deck washing, the ship was fitted with a protected fire main. It was charged from 50 ton electrical pumps as well as 75 ton steam-driven fire and bilge pumps in the engine and boiler rooms.

Anchors, Capstans and Cables
As originally fitted, Hood had three bow anchors. Two of these were bower anchors weighing 9.6 tons each. These were situated to port and starboard. There was also a sheet anchor of 9.5 tons situated behind the bower anchor on the starboard side. Two cable holders and a middle line capstan were provided, all connected to the capstan engine. A third cable holder was provided for the sheet cable for letting go only. The sheet anchor was eventually removed, leaving Hood with two bow anchors. At the stern, a 3 ton anchor was originally fitted. Its capstan was worked by Williams-Janney gear driven by an electric motor. This anchor was later moved to the Shelter Deck and eventually removed from the ship completely. There were additional anchors carried amidships at various times during her service.

The bow anchor cables/chains were made up of 1 ft 8 inch links which were 3 3/8 inches in diameter. The combined cables consisted of 41 shackles (35 full shackles and 12 half shackles) for an overall (combined) length of 3,075 ft when three bow anchors were carried (the bower cables were each about 15 shackles/1,125 ft in length and the sheet cable was somewhat smaller at about 825ft).

Paravanes were stored in two small structures immediately abaft the forward breakwater. They were also known to be mounted to the forward superstructure. These somewhat torpedo shape devices were dragged or towed from lines on the bow and were used to detect mines or obstacles before they could damage the ship.

Hood was equipped with voice tubes, telephones and loudspeaker systems.

As Completed (1920) 8x 36" Searchlights
- x4 on Searchlight Platform between funnels
- x2 on After Searchlight Platform
- x2 on platform on foremast 4x 24" signaling searchlights on Admiral's Bridge

July 1921 Refit
2x 36" searchlights removed from Searchlight Platform between funnels

September-November 1923 Refit
2x 36" searchlights replaced (as above)

October-December 1924 Refit
2x 36" searchlights once again removed (as above)

November 1925 - July 1926 Refit
Searchlights on After Concentrating Position moved abreast each other
2x 24" signaling searchlights removed

June - October 1936 Refit
36" searchlight platform removed from foremast

Feb-August 1939 Refit
4x 44" searchlights added, one on either side of After Concentrating Position and one either side just aft of number two funnel
2x 24" Signaling light added on bridge
Replacement of 36" searchlights and removal of the platform between the funnels.

Final Outfit (As Sunk)
6 x 44" searchlights (2 just aft of second funnel and 4 on the After Concentrating Position)
4x 24" signaling searchlights

Boats and rafts used aboard H.M.S. Hood