The G7e

The G7e/T3 torpedoes were the standard torpedoes for Germany during World War II. All of the G7e models shared standardized dimensions for all German torpedoes designed for use by U-boats during World War II, they measured 53.3 cm (21 inches) in diameter, 7.16 m in length, and carried a Hexanite warhead of 280 kg.
All were powered by 100 hp (75 kW) electric motors and lead-acid batteries which needed constant naintenance to maintain their reliability. Additionally, the batteries of these torpedoes needed to be preheated to a temperature of 30 °C (85 °F) to operate with maximum speed and range, though generally this was a non-issue as U-boats had the element of surprise and often had the advantage of firing the first shot.

Characteristics.

Length - 7186 mm. Housing - 533 mm. Weight - 1603 kg. Speed - 30 knots.
Cruising range -5000 m at 30 knots.
Weight battle charger branch - 280 kg. Battery weight - 665 kg.
Type of fuse - contact and non-contact.