I know the safety lock is in a form of a tiny propeller that spins itself off a threaded shaft and falls away after the torpedo runs about 30 yards, thus arming the torpedo. I do not know why Ballard considered it dangerous just sitting in the tube. As to the "No hiss" I figure in writing his book he may have had first hand information from that time in the form of a diary, log, news
Forum: Technology and Operations

I am an author of several award winning stage and screenplays. I also write historical novels that are historically and technically correct as I am fussy about details. I have used uboat.net for research but never the forum. I have a question I need answered and figured I'd best toss it out to all you fellows here as you are the experts and I have not been able to find answers in my resea
Forum: Technology and Operations