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| Torpedo | |
| G7a T1 | |
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| G7a T1 (Torpedo) | |
| Torpedo Characteristics | |
| Date Of Design | About 1930 |
| Date In Service | About 1938 |
| No. of weapons installed | Bismarck: Never had torpedoes installed Tirpitz: 2 banks 533 mm quadruple mountings installed from autumn 1941 |
| Weight | 1.528 kg (3.369 lbs) |
| Overall Length | 7,186 m (23 ft. 7 in) |
| Diameter | 533 mm (21") |
| Explosive Charge | 320 kg (661 lbs) Hexanite |
| Range and speed | 6.000 m (6.560 yards) at 44 knots |
| 8.000 m (8.750 yards) at 40 knots | |
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14.000 m (15.300 yards) at 30 knots |
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| Power | Decahydronaphthalene (Decalin) wet heater |
| Ammunition Inventory | 24 Torpedoes (only on the Tirpitz) |
| Notes: | The 44 knot speed was found to overload the engine and was not used during the early years of the war. |
| German Torpedo Designations | |
| German Torpedos were designated as to their diameter, length and propulsion. Modifications were usually, but not always, denoted by "T" numbers. | |
| Diameter: | "F" = 450 mm, "G" = 500 or 533 mm, "H" = 600 mm and "J" = 700 mm. |
| Length: | To the nearest meter. |
| Propulsion: | "a" = wet heater, "e" = electric, "u" = hydrogen peroxide. |
| G7a T1 (designation explained) | |
| The designation G7a T1 means that the torpedo was 533 mm (21") in diameter, was about 7 meters long, used wet heater as propulsion and it was the original design. | |
| Bismarck | |
| It was never installed on Bismarck | |
| Tirpitz | |
| This type of torpedo was installed on Tirpitz from autumn 1941. | |
| Technical Layout - Armament | ||
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| G7a T1 (Torpedo) | ||