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U66 submarines (1915)


Photo



U70

Ships


Name No Yard No Builder Laid down Launched Comp Fate
U66 (ex-U7)   203 Germaniawerft, Kiel 1913 22.4.1915 7.1915 lost 3.9.1917
U67 (ex-U8)   204 Germaniawerft, Kiel 1913 15.5.1915 8.1915 to United Kingdom 11.1918
U68 (ex-U9)   205 Germaniawerft, Kiel 1913 1.6.1915 8.1915 sunk 22.3.1916
U69 (ex-U10)   206 Germaniawerft, Kiel 1913 24.6.1915 9.1915 lost 24.7.1917
U70 (ex-U11)   207 Germaniawerft, Kiel 1913 20.7.1915 9.1915 to United Kingdom 11.1918


Technical data


Displacement standard, t

 

Displacement normal, t

791 / 933

Length, m

69.5

Breadth, m

6.30

Draught, m

3.79

No of shafts

2

Machinery

U66, 67: 2 Germania diesels / 4 SSW electric motors

U68: 70: 2 Germania diesels / 4 Pichler electric motors

Power, h. p.

2300 / 1240

Max speed, kts

16.8 / 10.3

Fuel, t

diesel oil 87

Endurance, nm(kts)

7370(8) / 115(5)

Armament

1 x 1 - 88/27 TK L/30 C/08, 5 - 450 TT (4 bow, 1 stern, 12)

Complement

36

Diving depth operational, m

50



Graphics


<i>U70</i>
U70


Project history

Originally ordered as U7-11 for the Austro-Hungarian Navy, these UD type boats were built by Germaniawerft, and were purchased by Germany on 28 November 1914. Redesigned and reconstructed to German standards they were commissioned into the Imperial German Navy. Compared with other Austrian submarines of the time, without doubt these units would have been the best. Double-hull construction.

Modernizations

1916-1917, all: - 1 x 1 - 88/27; + 1 x 1 - 105/43 TK L/45 C/16

mid-1918, all: - 1 x 1 - 88/27

Naval service

U66 was lost by unknown cause after 3.9.1917 in the North Sea. U68 was sunk W of Dunmore Head by gunfire of British decoy vessel Farnborough 22.3.1916.