The G7es (T5) "Zaunkönig" ("wren") was an acoustic torpedo employed by German U-boats during World War II. It was called the GNAT (German Navy Acoustic Torpedo) by the British.
The torpedo was electric and had an effective range of 5700 metres at a speed of 24 knots (44 km/h). This torpedo employed passive acoustic homing to find its target, becoming active after a straight run of 400 metres. The homing mechanism consisted of two hydrophone receivers which sensed the sound waves of ship propellers and altered the direction of the rudder via an electropneumatic device.
There were three variants:
Two flat-nosed versions which contained four sets of magnetostriction hydrophones.
A round-nosed version which contained two magnetostriction hydrophones inside a funnel-shaped baffle.
#Torpedo #Kriegsmarine #Type_VII #uboat #uboot #Unterseeboot #WW2
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