| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| U791 (ex-V300) | 698 | Germaniawerft, Kiel | 1942 | --- | --- | cancelled summer 1942 |
|
Displacement standard, t |
|
|
Displacement normal, t |
610 / 655 |
|
Length, m |
52.1 |
|
Breadth, m |
4.03 |
|
Draught, m |
5.49 |
|
No of shafts |
2 |
|
Machinery |
2 MWM diesels / 2 Germania-Walter geared hydrogen peroxide steam-gas turbines or 2 GL electric motors |
|
Power, h. p. |
330 / 4360 or 150 |
|
Max speed, kts |
9.3 / 19 or 9.6 |
|
Fuel, t |
diesel oil 34 + Walter fuel 98 |
| Endurance, nm(kts) | 5000(5.5) / 450(10) or 150(2) |
|
Armament |
2 - 533 TT (bow, 6) |
| Electronic equipment | GHG hydrophone |
|
Complement |
25 |
| Diving depth operational, m | 80 |
Project history: Experimental submarines of construction of G. Walter with hydrogen peroxide turbines used H2O2 as oxidizer. Using of 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. V80 was stricken in the end of 1942 and 29.3.1945 scuttled at Hel. She was followed by experimental V300, included to fleet list as U791, but never completed.
© Ivan Gogin, 2008-14