NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U1405		255	Blohm & Voss, Hamburg	10.1943	1.12.1944	12.1944	scuttled 5.5.1945
U1406		256	Blohm & Voss, Hamburg	10.1943	2.1.1945	2.1945	scuttled 5.5.1945, salvaged to USA, BU 5.1948
U1407		257	Blohm & Voss, Hamburg	11.1943	2.1945	3.1945	scuttled 5.5.1945, salvaged, to United Kingdom 1946 (Meteorite)
U1408		258	Blohm & Voss, Hamburg	10.1943	---	---	damaged incomplete 30.3.1945, cancelled
U1409		259	Blohm & Voss, Hamburg	12.1943	---	---	damaged incomplete 30.3.1945, cancelled
U1410		260	Blohm & Voss, Hamburg	12.1943	---	---	cancelled 3.1944

Technical data

Displacement standard, t
Displacement normal, t	312 / 337
Length, m	41.5
Breadth, m	4.50
Draught, m	4.30
No of shafts	1
Machinery	1 Deutz diesel / 1 Brückner & Kanis-Walter geared hydrogen peroxide steam-gas turbine / 1 AEG electric motor
Power, h. p.	210 - 230 / 2500 / 77
Max speed, kts	8.5 / 25 / 5
Fuel, t	diesel oil 20 + Walter fuel 52
Endurance, nm(kts)	3000(8) / 123(25) or 76(2)
Armament	2 - 533 TT (short) (bow, 4)
Electronic equipment	FuMO 30 or FuMO 61 radar, GHG hydrophone, FuMB 3 Bali, FuMB 6 Palau ECM suites
Complement	12
Diving depth operational, m	80

Project history

Experimental submarines of a construction of G. Walter with hydrogen peroxide turbines used H2O2 as oxidizer. Using of this non-standard  fuel-oxidizer mix, known as "Walter-Treibstoff", theoretically allowed to increase strongly submerged machinery power of submarine and submerged speed, allowing to use diesel oil in submerged position.

First built was experimental V80, shown submerged 28kts speed, but appeared too uneconomical. She was followed by experimental V300, included to fleet list as U791, but never completed.

In summer of 1942 orders for 4 submarines of XVIIA series belonging to two different designs: Wa201 and Wk202. These submarines had single-shaft diesel-electric machinery with additional hydrogen peroxide turbine intended for short-term increase of submerged speed. Trials were passed successfully and then 4.1.1943 the order on 12 submarines of XVIIB series was been given out, only 10 such boats were laid down, and building of 7 units was cancelled after the beginning of building of "elektroboot"s of XXI and XXIII series.

Modernizations

None.

Naval service

U1405 was scuttled 5.5.1945 at Eckernförde. U1406 was scuttled 7.5.1945 at Cuxhaven, salvaged and transferred to the USA, BU in 1948. U1407 was scuttled 7.5.1945 at Cuxhaven, salvaged and transferred to United Kingdom as Meteorite, BU in 1949.