>>/49440/
That's relatively easy to find:
https://www.historynet.com/us-torpedo-troubles-during-world-war-ii/
https://www.wearethemighty.com/popular/ww2-navy-torpedo-problems-mk14/
Here's an article about the German ones:
http://www.uboataces.com/articles-wooden-torpedoes.shtml

I dl'd a handful of books, one which seems to be Dönitz's memoirs, in English. Gonna flip couple of pages.