Technical Layout - Armament - G7a T1 (Torpedo)

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
	14.000 m (15.300 yards) at 30 knots
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.