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FIGHTING SHIPS OF THE WORLD
UNITED KINGDOM
SUBMARINES
"improved K" submarines (K26) (1(5), 1923)


Photo



K26 1923

Ships


Name No Yard No Builder Laid down Launched Comp Fate
K23     Armstrong, Elswick 1918 --- --- cancelled 11.1918
K24     Armstrong, Elswick / Chatham DYd 1918 --- --- cancelled 11.1918
K25     Armstrong, Elswick / Chatham DYd 1918 --- --- cancelled 11.1918
K26     Vickers, Barrow / Chatham DYd 1918 26.8.1919 6.1923 sold 3.1931
K27     Vickers, Barrow 1918 --- --- cancelled 11.1918
K28     Vickers, Barrow / Chatham DYd 1918 --- --- cancelled 11.1918


Technical data


Displacement standard, t 
Displacement normal, t

2140 / 2530

Length, m

107.0

Breadth, m

8.50

Draught, m

4.90

No of shafts

2

Machinery

2 sets Parsons geared steam turbines, 2 Yarrow boilers / 4 electric motors

Power, h. p.

10500 / 1440

Max speed, kts

23.5 / 9.5

Fuel, t

oil

Endurance, nm(kts)12500(10) / 30(4)
Armament

3 x 1 - 102/40 QF Mk IV, 6 - 533 TT (bow, 12), 4 - 450 TT (beam, 8)

Complement

59

Diving depth operational, m50


Standard scale images


<i>K26</i> 1923
K26 1923


Graphics


<i>K26</i> 1923
K26 1923


Project history

In this class the known defects of the 'K' class were eliminated as far as possible. Motors, batteries and beam TT remained the same but a much heavier bow salvo of 6 533mm TT was provided. The bow was given more flare to improve seakeeping, and the superstructure was higher to protect funnels and uptakes. Other improvements were to extend the superstructure forward to form a gun platform and to move hydroplanes 4.9m further aft, where they were less susceptible to damage. Faster diving was possible by moving some ballast tanks to the internal hull, below the water line. Six were ordered early in 1918, but five were cancelled in November. The frames of K24, K25 and 28 were then ordered on 31 December 1918 to be taken to Chatham for completion, but that was later rescinded as well. In 1920 K26 was towed to Chatham and completed in June 1923.

Modernizations

1929: - 4 - 450 TT (beam); + type 118 sonar

Naval service

No significant events.