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German Navy WW.2 anti sub projectiles

genkideskan

Honoured Member RIP
Iam just researching german WW. 2 navy projectiles. Now Ive found a 10,5cm projo made for anti sub role listed in documents. It is very long. The normal 10,5cm projo will be 4,4 calibers long (app. 18") This special Tauchgranate (diving shell) should be about 10 calibers long ( 41"). That is very long.
Anybody here ever has seen or heard about those an overlong shell?
The shell should be fired from normal guns, dive into the water and using a water pressure fuze detonate in an preset depth.
8,8cm - 10,5cm - 12,7cm and 15cm where introduced, and they are overlong too

Any idea
 
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