NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U792		455	Blohm & Voss, Hamburg	12.1942	28.9.1943	11.1943	scuttled 4.5.1945
U793		456	Blohm & Voss, Hamburg	12.1942	4.3.1944	4.1944	scuttled 4.5.1945

Technical data

Displacement standard, t
Displacement normal, t	277 / 309
Length, m	39.0
Breadth, m	4.50
Draught, m	4.30
No of shafts	1
Machinery	1 Deutz diesel / 2 Germaniawerft-Walter geared hydrogen-peroxide steam-gas turbine / 1 AEG electric motor
Power, h. p.	230 / 5000 / 77
Max speed, kts	9 / 25 / 5
Fuel, t	diesel oil 18 + Walter fuel 43
Endurance, nm(kts)	2910(8.5) / 127(20) or 50(2)
Armament	2 - 533 TT (bow, 4)
Electronic equipment	FuMO 30 radar, GHG hydrophone, FuMB 3 Bali, FuMB 6 Palau ECM suites
Complement	12
Diving depth operational, m	80

Standard scale images

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

1944-1945, some survived: - FuMO 30 radar; + FuMO 61 radar

Naval service

U792 and U793 were scuttled 4.5.1945 in Kiel canal.