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fighting ships of the world

ROYAL NAVY - UNITED KINGDOM

SUBMARINES

'R' submarines (1918-1919)

R1 1918

Name No Builder Laid down Launched Comp Fate
R1   Chatham DYd 2/1917 25/4/1918 10/1918 sold 1/1923
R2   Chatham DYd 2/1917 25/4/1918 12/1918 sold 2/1923
R3   Chatham DYd 2/1917 8/6/1918 3/1919 sold 2/1923
R4   Chatham DYd 2/1917 8/6/1918 8/1919 sold 5/1934
R5   Pembroke DYd 1917 --- --- cancelled 1919
R6   Pembroke DYd 1917 --- --- cancelled 1919
R7   Vickers, Barrow 11/1917 14/5/1918 6/1918 sold 2/1923
R8   Vickers, Barrow 11/1917 28/6/1918 7/1918 sold 2/1923
R9   Armstrong, Elswick 12/1917 12/8/1918 10/1918 sold 2/1923
R10   Armstrong, Elswick 12/1917 5/10/1918 4/1919 sold 2/1929
R11   Cammell Laird, Birkenhead 12/1917 16/3/1918 8/1918 sold 2/1923
R12  

Cammell Laird, Birkenhead

12/1917 9/4/1918 10/1918 sold 2/1923

 

Displacement standard, t

 

Displacement normal, t

410 / 503

Length, m

49.9

Breadth, m

4.65

Draught, m

3.51

No of shafts

1

Machinery

NLSE diesel / 2 electric motors + 1 electric motor for slow running

Power, h. p.

240 / 1200 + 25

Max speed, kts

9.5 / 15

Fuel, t

diesel oil 13

Endurance, nm(kts) 2000(8) / 240(4)

`

6 - 450 TT (bow, 12)

Complement

22

Diving depth operational, m 75

Ship project history: This class, the first anti-submarine 'hunter-killers', were 30 years ahead of their time. In March 1917 the DNC's department submitted a design of submarine fast enough to overtake enemy submarines and sink them with torpedoes, rather than gunfire. The design was not approved, but later that year when Commodore (S) suggested the idea should be developed, it was resurrected and orders were placed in December (armament increased from four to six TT). The hull reverted to the 'spindle' shape of the 'Hollands' and 'A' to 'C classes, and hull-sections were the same as the H21 class to save time (they were ordered in place of cancelled 'H' boats). The propulsion unit was a single 'H' engine, but a 'J' class 220-cell battery was used to boost underwater speed. An unusual step was the provision of a small 25hp auxiliary motor mounted on the shaft, for slow running. The bow compartment contained five powerful and sensitive hydrophones, with bearing measurement lo allow torpedoes to be fired underwater. Although the single shaft made them hard to manoeuvre on the surface, the streamlined hull and large rudder gave them good underwater performance. Unfortunately the only engagement in which their unique capabilities could be used - R8's October 1918 attack on a U-boat - was marred by a faulty torpedo, and they were discarded early.

Modernizations: None

Naval service: No significant events.

R4

Ivan Gogin, 2008-13