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FIGHTING SHIPS OF THE WORLD
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SUBMARINES
B1 midget submarines (1916)
Ships
| Names | Builders | Completed | Losses | Transfers | Discarding |
|---|---|---|---|---|---|
B1-6 |
R. Arsenale La Spezia: B1-6 |
1916: B1-3 |
B4-6 (BU incomplete) |
None |
1/1919: B1-3 |
Technical data
| Displacement standard, t | |
|---|---|
| Displacement normal, t | 40 / 46 |
| Length, m | 15.1 |
| Breadth, m | 2.30 |
| Draught, m | 2.50 |
| No of shafts | 1 |
| Machinery | 1 Itala petrol engine / 1 Savigliano electric motor |
| Power, h. p. | 85 / 40 - 60 |
| Max speed, kts | 6.9 / 5 |
| Fuel, t | petrol |
| Endurance, nm(kts) | 128 (6.9) / 9(5) |
| Armament | 2 - 450 TT (bow, 2) |
| Complement | 5 |
| Diving depth operational, m | 50 |
Standard scale images
B1 1916
Project history
An enlargement and an improvement of the 'A' class, these boats, also designed by Eng Vice Admiral Edgardo Ferrati, were provided with two different kind of motors, having a petrol motor for surface navigation and a greater endurance. Their torpedoes were in real tubes. They too had been conceived for harbour defence and were transportable by railway. B4-6 construction suspended in 1917, discarded 1919, scrapped 1920.
Modernizations
None.
Naval service
No significant events.
