I found an a snippet of information I want to follow up because of the potential consequences of this fateful event.
The topic is WWII, and a faulty torpedo igniting mechanism which prevented the Germans to sink quite a few capital ships of the Royal Navy, during Operation Weserübung. The book where I found this info, is quite biased, a "pulp fiction" of the history genre, although the data itself mostly legit (or at least coming from books that are considered good sources, eg. Churchill and Dönitz), how the events are dressed up, how the events are explained, is a different matter (biased towards the Axis).
So basically it says that the German U-Boots were equipped with a new, not yet battle tested torpedo, the G-7e, which were ignited with a magnetic pistol. These torpedoes were only tried in the Baltic, and in the northern waters of Norway they don't detonated the warheads. Over hundred such torpedoes were launched, and most failed. The author estimates they could have scuttled over 20 British ships, among them such names like HMS Warspite (captain Schütze losed 3 projectiles at her).

I have no data yet, just this from Wikipee:
>Pi G7A-MZ: Combined mechanical and (faulty) magnetic igniter (replaced by Pi2)
I suspect this one is mentioned in the book. So promising start. There are many angles to take a look at this.

Maybe should have write this in the Suvorov thread, but will be fine here.