Which country developed the Z-13 torpedo?

The Z-13 torpedo was an electric heavy torpedo of the French Navy which, although it was initially based on captured German technology, was adapted and refined by French engineers.

It was designed to be fired from submerged submarines to target surface ships. The Z-13 was propelled by two electric motors, each driving a propeller. A Ca-Ni battery fed the engines. The payload could be detonated either on contact, or by a magnetic detonator.

It was used in service by the French Navy from WWII until 1960, and it had an overall length of 7.125 metres, and a diameter of 550 mm, and the entire torpedo weighed 300 kgs.

Manufactured by DCAN (Direction des constructions et armes navales) in Toulon, it was powered by two contra-rotative propellers that moved it through the water at a top speed of 25 knots with an operational range of 5 kms.

The warhead utilised Hexamine, an explosive which has a very high energy density, burns smokeless and leaves no ashes.