NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U27		17	KW Danzig	1911	14.7.1913	5.1914	sunk 19.8.1915
U28		18	KW Danzig	1911	30.8.1913	6.1914	sunk 2.9.1917
U29		19	KW Danzig	1911	11.10.1913	8.1914	sunk 18.3.1915
U30		20	KW Danzig	1911	15.11.1913	8.1914	to United Kingdom 11.1918

Technical data

Displacement standard, t
Displacement normal, t	675 / 867
Length, m	64.7
Breadth, m	6.32
Draught, m	3.48
No of shafts	2
Machinery	2 MAN diesels / 2 AEG electric motors
Power, h. p.	2000 / 1200
Max speed, kts	16.7 / 9.8
Fuel, t	diesel oil 101
Endurance, nm(kts)	9770(8) / 85(5)
Armament	1 x 1 - 7.9/79, 4 - 500 TT (2 bow, 2 stern, 6)
Complement	35
Diving depth operational, m	50

Project history

Medium coastal submarines. Double-hulled.

Modernizations

1915, U27, U28: - 1 x 1 - 7.9/79; + 2 x 1 - 88/27 TK L/30 C/08

1915, U30: - 1 x 1 - 7.9/79; + 1 x 1 - 88/27 TK L/30 C/08

1917, U30: + 1 x 1 - 88/27 TK L/30 C/08

1918, U30: - 2 x 1 - 88/27; + 1 x 1 - 105/43 TK L/45 C/16

Naval service

U27 was sunk by British decoy vessel Baralong 19.8.1915 in the English Channel. U28 was sunk after explosion of torpedoed by her munition ship Olive Branch 2.9.1917 in the Arctic. U29 was rammed by British battleship Dreadnought 18.3.1915 in the North Sea. U30 accidentally sunk 22.6.1915 in the mouth of Ems, salvaged 27.8.1915 and commissioned again.