Experimental Submarines

Swordfish Class

Swordfish Class Experinental Submarine

The Swordfish class was the first British steam-driven submarine.   This was another design, along with the Nautilus which didn't achieve any of the advances it was hoped to.   The decision was taken to go along with the 'J' class in preference of either Nautilus or Swordfish.

Swordfish was converted into a surface patrol vessel in 1917 and was the forerunner for the ill-fated K class.

1 Built

Swordfish
Later (S1)

Scotts, Greenock
1916

 

Technical Information

Displacement:
932 sf
1,385 sm as designed
1,470 sm as completed

Length (Metric):
70.5

Breadth (Metric):
7

Draught/Height (Metric):
4.5

Machinery:
Parsons geared impulse-reaction steam turbines, one Yarrow boiler 3750 hp
2 Electric Motors 1400 hp.
Two shafts.

Speed (kts):
18 knots sf
10 knots sm

Oil Supply (tons):


Armament:
2 x 21 inch tubes (bow),
4 x 18 inch tubes (beam).
2 x 3 inch guns.
Reloads:2 x 21 inch, 8 x 18 inch.

Range:
1,120 nm at full speed.
1,700 nm at 12.5 kts
3,000 nm at 8.5 sf

Complement:
42 Officers and Ratings