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fighting ships of the world

ROYAL NAVY - UNITED KINGDOM

SUBMARINES

L9 submarines (1918-1926)

L9 1920

L23 1939

Name No Builder Laid down Launched Comp Fate
L9   Denny, Dumbarton 10/1916 29/1/1918 5/1918 sold 6/1927
L10   Denny, Dumbarton 2/1917 24/1/1918 6/1918 sunk 30/10/1918
L11   Vickers, Barrow 1/1917 26/2/1918 6/1918 sold 2/1932
L12   Vickers, Barrow 1/1917 16/3/1918 6/1918 sold 2/1932
L14   Vickers, Barrow 1/1917 10/6/1918 10/1918 sold 5/1934
L15   Fairfield, Govan 11/1916 16/1/1918 3/1918 sold 2/1932
L16   Fairfield, Govan 11/1916 9/4/1918 5/1918 sold 2/1934
L17   Vickers, Barrow 1/1917 13/5/1918 9/1918 sold 2/1934
L18   Vickers, Barrow 6/1917 21/11/1918 5/1919 sold 10/1936
L19   Vickers, Barrow 7/1917 4/2/1919 8/1919 sold 4/1937
L20   Vickers, Barrow 7/1917 23/9/1918 1/1919 sold 1/1935
L21   Vickers, Barrow 9/1917 11/10/1919 10/1920 sold 2/1939
L22   Vickers, Barrow 11/1917 25/10/1919 6/1921 sold 8/1935
L23 23L, N23 Vickers, Barrow / Chatham DYd 8/1917 1/7/1919 10/1924 foundered in tow for BU 5/1946
L24   Vickers, Barrow 2/1918 19/2/1919 2/1920 collision 14/1/1924
L25   Vickers, Barrow 2/1918 13/2/1919 7/1920 sold 1935
L26 26L, N26 Vickers, Barrow / Portsmouth DYd 1/1918 29/5/1919 10/1926 scuttled 9/1946
L27 27L, N27 Vickers, Barrow / Sheerness DYd 1/1918 14/6/1919 3/1926 sunk as target 25/9/1945
L28   Vickers, Barrow 1918 --- --- cancelled 1919
L29   Vickers, Barrow 1918 --- --- cancelled 1919
L30   Vickers, Barrow 1918 --- --- cancelled 1919
L31   Vickers, Barrow 1918 --- --- cancelled 1919
L32   Vickers, Barrow 1918 23/8/1919 --- cancelled 1919, BU 3/1920
L33   Swan Hunter, Wallsend 9/1917 29/5/1919 12/1919 sold 2/1932
L34   Pembroke DYd 1918 --- --- cancelled 1919
L35   Pembroke DYd 1918 --- --- cancelled 1919

 

Displacement standard, t

 

Displacement normal, t

890 / 1080

Length, m

72.7

Breadth, m

7.15

Draught, m

4.04

No of shafts

2

Machinery

Vickers diesels / electric motors

Power, h. p.

2400 / 1600

Max speed, kts

17 / 10.5

Fuel, t

diesel oil 78

Endurance, nm(kts)

3800(10) / 75(4)

Armament

L9, L16, L18 - 24, L26, 27: 1 x 1 - 102/40 QF Mk IV, 4 - 533 TT (bow, 8), 2 - 450 TT (beam, 2)

L10: 1 x 1 - 102/41 QF Mk VII, 4 - 533 TT (bow, 8), 2 - 450 TT (beam, 2)

L11, L14, L17: 1 x 1 - 102/40 QF Mk IV, 4 - 533 TT (bow, 8), 16 mines

L12: 1 x 1 - 102/41 QF Mk VII, 4 - 533 TT (bow, 8), 16 mines

L15: 1 x 1 - 76/45 20cwt QF Mk II, 4 - 533 TT (bow, 8), 2 - 450 TT (beam, 2)

L25: 1 x 1 - 102/40 QF Mk IV, 4 - 533 TT (bow, 8), 14 mines

L33: 1 x 1 - 102/45 QF Mk XII, 4 - 533 TT (bow, 8), 2 - 450 TT (beam, 2)

Complement

38

Diving depth operational, m 50

Ship project history: War experience demanded a heavier bow salvo, and so the second batch of 'L' class was given 4 533mm TT, although the beam 450mm were retained to avoid having to enlarge the hull. The lead boat L9 was ordered in August 1916, followed by L10-35 in December (excluding the 'unlucky' L13). Although it was planned to build L36-49 later, orders were not placed. Five boats were completed as minelayers, along the lines of the 'E' class, with vertical mine-chutes in the saddle tanks. From L12 onwards the 102mm gun was raised to the bridge deck level, where it was served by an enclosed access trunk. This arrangement was intended to permit the 'L's to engage a U-boat out of torpedo-range, with the boat trimmed down. They were a great improvement over the 'E' class, particularly in accommodation. Seven were cancelled in 1918-19.

    The main alterations were dictated by the change to 533mm TT. The pressure hull was lengthened by 2.3m and a water-tight bulkhead was added abaft the bow TT to separate the tube compartment from the forward torpedo room. From L18 onwards 78t fuel was carried, an improvement which was retro-fitted to the earlier 'L' class and L9-17. No spare torpedoes were carried for the beam TT.

Modernizations: None

1/1946, L23, L26: 1 x 1 - 102/40 P Mk IX, 4 - 533 TT, 2 - 450 TT

Naval service: L10 was sunk 24/1/1918 by German destroyers off the Texel. L24 was lost 14/1/1924 as result of collision with battleship Resolution off Portland. Three survived to the end of the Second World War on training duties.

L20

Ivan Gogin, 2008-15