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FIGHTING SHIPS OF THE WORLD
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SUBMARINES
U87 submarines (1917)


Ships


Name No Yard No Builder Laid down Launched Comp Fate
U87   31 KW Danzig 1915 22.5.1916 2.1917 sunk 25.12.1917
U88   32 KW Danzig 1915 22.6.1916 4.1917 sunk 5.9.1917
U89   33 KW Danzig 1915 6.10.1916 6.1917 sunk 13.2.1918
U90   34 KW Danzig 1915 12.1.1917 8.1917 to United Kingdom 11.1918
U91   35 KW Danzig 1915 14.4.1917 9.1917 to France 11.1918
U92   36 KW Danzig 1915 12.5.1917 10.1917 sunk 9.9.1918


Technical data


Displacement standard, t

 

Displacement normal, t

757 / 998

Length, m

65.8

Breadth, m

6.20

Draught, m

3.88

No of shafts

2

Machinery

2 MAN diesels / 2 SSW electric motors

Power, h. p.

2400 / 1200

Max speed, kts

15.6 / 8.6

Fuel, t

diesel oil 133

Endurance, nm(kts)

11380(8) / 56(5)

Armament

U87 - 89: 1 x 1 - 105/43 TK L/45 C/16, 1 x 1 - 88/27 TK L/27 C/08, 4 - 500 TT (2 bow, 2 stern, 10 - 12)

U90: 1 x 1 - 105/43 TK L/45 C/16, 4 - 500 TT (2 bow, 2 stern, 10 - 12)

U91, 92: 1 x 1 - 105/42 Utof L/45 C/16, 4 - 500 TT (2 bow, 2 stern, 10 - 12)

Complement

36

Diving depth operational, m

50



Standard scale images


<i>U87</i> 1917
U87 1917


Project history

War order F. Double-hulled. The 'Project 25' boats, based on the U50. They had a diving time of 56 seconds, and in most respects resembled previous classes.

Modernizations

None.

Naval service

U87 was sunk by ramming and deep charges of British patrol boat P56 in the Irish Sea 25.12.1917. U88 was mined 5.9.1917 in the Deutsche Bight. U89 was rammed by British cruiser Roxburgh 13.2.1918 in the Atlantic. U92 was mined in the North Sea 9.9.1918.