WWI U-boat Types


Type Mittel U

Mittel-U class


46 boats commissioned

Construction history of type Mittel U

              
U-boats# ShipyardWerk #Built during
U 81 - U 866Germaniawerft, Kiel251 - 256 1915 - 1916
U 87 - U 926Kaiserliche Werft, Danzig31 - 36 1915 - 1917
U 93 - U 986Germaniawerft, Kiel257 - 262 1915 - 1917
U 99 - U 1046A.G. Weser, Bremen250 - 255 1915 - 1917
U 105 - U 11410Germaniawerft, Kiel274 - 283 1916 - 1918
U 1351Kaiserliche Werft, Danzig  1916 - 1918
U 1361Kaiserliche Werft, Danzig  1916 - 1918
U 1371Kaiserliche Werft, Danzig  1916 - 1918
U 1381Kaiserliche Werft, Danzig  1916 - 1918
U 1601Bremer Vulkan, Vegesack  1917 - 1918
U 1611Bremer Vulkan, Vegesack  1917 - 1918
U 1621Bremer Vulkan, Vegesack  1917 - 1918
U 1631Bremer Vulkan, Vegesack  1917 - 1918
U 164 - U 1674Bremer Vulkan, Vegesack651 - 6541917 - 1919
Table includes 2 boats finished after the Armistice (11 Nov 1918)


U 135 of type Mittel U

These boats had excellent seagoing abilities and handled very well. Many arrangements on these boats were also seen on the WWII type IX boats when their design work took place 20 years later.

The boats had various arrangements of deck guns. Some had only one 88mm gun while others had a single 105mm gun - but most had both originally. In 1917 some of the boats were refitted with a single 105mm gun (220 rounds).

All U-boats of type Mittel U

Below are the 46 commissioned U-boats of this type.

U 81, U 82, U 83, U 84, U 85, U 86, U 87,
U 88, U 89, U 90, U 91, U 92, U 93, U 94, U 95,
U 96, U 97, U 98, U 99, U 100, U 101, U 102, U 103,
U 104, U 105, U 106, U 107, U 108, U 109, U 110, U 111,
U 112, U 113, U 114, U 135, U 136, U 137, U 138, U 160,
U 161, U 162, U 163, U 164, U 165, U 166, and U 167.

Technical information for type Mittel U

Displacement:
(tons)		808 (sf)
946 (sm)
1160 (total)
Length: (m)7,06 oa
55,55 ph
Beam: (m)6,30 oa
4,15 ph
Draught: (draft)4,02 m
Height:8,00 m
Power: (hp)2400 (sf)
1200 (sm)
Speed:
(knots)		16,8 (sf)
9,1 (sm)
Range:
(miles / knots)		11220/8 (sf)
56/5 (sm)
Torpedoes:16
4/2 (bow / stern tubes)
Mines:No mines carried
Deck gun:1 88mm, 1 105mm
220 rounds
Crew:39 men
Max depth:ca. 50 m
(164 feet)
sm = submerged, sf = surfaced, ph = pressure hull,
oa = overall, hp = horsepower.