TDC torpedo speed selector switches

[Rockin Robbins]

I've searched seafarer's link for the Mark III TDC Manual and can't find any reference to the "simple selectors for the speed settings" for Mark 14 torpedoes. The only apparent possibility is the four dials on the poorly documented electrical section. There is one illustration and I can read enough to see that the right one is the power selector switch and the next one to the left is legible. That leaves two unidentified electrical knobs that may be the adjustment.

However, a schematic I've found shows a hand crank for Sz which is the torpedo speed. Hey, YOU try wading through all the calculation derivations to figure out what to look for! It's enough to make you plenty cranky if high level algebra and trig is not your native language.



There's your input, Vern, right on this easy-breezy little diagram. Yer top crank there, labeled S sub Z (Sz phonetically rendered there), that's crank 5F-A, is adjustable torpedo speed between 25 and 60 knots.

So I'm STILL curious where this crank is on the actual unit. And now I'm really mystified as to the necessity to rebuild (presumably to the Mark IV unit) when a boat was in drydock being adapted for the electrical Mark 18 torpedoes.

I have an irrelevent aside, but I'll hold it as I don't want to hijack my own thread. Again, sorry CapnScurvy, for my irrelevent aside in your thread hijacking your masthead height and differing AoBs thread. Hope you can get it back on track.