So the triggering of the explosion of the torpedo, by the Hunley (after somehow securing the torpedo to the Housatonic and detaching it from itself) then backing off enough distance to draw taught a lanyard, .....is out the window. In fact, the Hunley, with the torpedo suspended from, and permanently bolted to a spar, purposefully impacted the Housatonic and the torpedo exploded when a pressure-sensitive trigger mechanism set off the charge. Is that about right?
So far, that's not where the evidence seems to point...
However, aside from some possible insights into physiology, none of this is new news to me. Here's my "Conclusions" slide -- made in early 2014:

I recall that, when I was creating it, there wasn't room for "shocked" on the "Crew" line -- where it really belonged...
Now, I'll consider moving it down -- and re-wording that line to include "lung"...
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The torpedo had to be virtually in contact with the Housatonic to be guaranteed effective -- but, it was bolted to the spar. Until some mechanism for triggering the explosion from inside the Hunley is discovered -- what other scenario fits the evidence?