Worst torpedo to use against a Yamato?

This is a question that has been bothering me lately...

In OTL, the Japanese battleship Yamato was sunk by around 11-15 torpedoes and 10-15+ bombs (give or take a few). The Musashi was sunk by around 18-22 torpedo hits and 20 bomb hits (give or take a few). Most people always seems to remark at how much damage these ships can take (by WWII standards).

If we used modern torpedoes, a Yamato-class battleship probably sinks in 1-4 torpedo hits. I'm pretty sure this has been covered before. What I have never seen discussed before is the MOST number of torpedoes needed to sink a Yamato-class battleship before it sinks. Assuming the Yamato could be placed at any latitude and duds are tracked, what anti-ship capable torpedo would perform the worst at sinking the Yamato in the following scenarios?:

Scenario One: any torpedo used operationally by the US during WWII.

Scenario Two: any torpedo used operationally during WWII.

Scenario Three: any torpedo used operationally post-1900.

Note: Yamato is sailing in the same condition as she was April 6, 1945 (Operation Ten-Go) sans escorts.
 
I was gonna suggest the self-destructing steam torps the Confederates tried to use that one time, but their outside the timeframe specified by the OP... still, I suppose their worth an honorable mention. :p
 
How bad were the early German WWII torpedoes? If I recall, the German G7e T2 had significant problems with the contact and magnetic influence triggers early in the war (which allowed HMS Nelson escape undamaged in 1939).
 
Not a realistic situation at all but a thought just crossed my mind of a British Royal Air Force officer asking for more torpedo bombers (for somewhere in the Pacific? Perhaps an early 1941 build up in Rabaul with whatever planes can be stolen from storage.). Due to shortages of aircraft he gets a squadron of Hawker Horsleys pulled out of storage somewhere.

His response is to signal Whitehall that they are obselete aircraft that cant handle a modern torpedo.

The general gets a message that his concerns will be addressed in the next supply convoy. The general expects new torpedo bombers. Instead he gets a supply of 60 Mark 7 torpedoes from ww1.

Then he has to faca a Yamato with them.
 
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For #1, Mark 24 mine (actually a torpedo), going to need quite a lot of them, if the 92 pound warhead can even do it at all

For serious anti ship torpedoes, Bliss-Levitt Mk 9, 210 pound warhead of plain ole TNT, used by older US subs early in the war

Yamato's TDS was rated for 880 pounds TNT
 
Which were the US sub torpedoes where the crews used to swap out the supplied detonators *at sea* with smuggled ones that would work ?? And, a day from port on their return, swap them back ??

I suppose the other candidate was the hapless torpedo-bomber attack on the Bismark, where, but for one very, very lucky strike on the rudder, yer actual 'Golden BB', the Bis' would have 'done the biz' on pursuit and further embarrassed the RN...
 

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How bad were the early German WWII torpedoes? If I recall, the German G7e T2 had significant problems with the contact and magnetic influence triggers early in the war (which allowed HMS Nelson escape undamaged in 1939).
The torpedoes themselves were fine (as long as the crew properly maintained the electric version, it was bit twitchy), the issue was with the contact AND magnetic pistols. The American had similar issues, but the torpedoes also tended to run noticeably deeper than the set depth.
Which were the US sub torpedoes where the crews used to swap out the supplied detonators *at sea* with smuggled ones that would work ?? And, a day from port on their return, swap them back ??

I suppose the other candidate was the hapless torpedo-bomber attack on the Bismark, where, but for one very, very lucky strike on the rudder, yer actual 'Golden BB', the Bis' would have 'done the biz' on pursuit and further embarrassed the RN...

The weakness with the FAA strikes was the general size of the air wing involved & the training levels of the particular crews, not the torpedo the British deployed. The first British strike was made by only 9 aircraft, the second by 15. When the U.S. sank the Yamato in 1945 they HIT her with between 7 & 12 torpedoes (the last strike, which was actually launched as she was starting to capsize claimed hits, but the number is an open question, but seven were verified prior to the order to abandon ship) and 12 1,000 and 2,000 pound SAP bombs. the strikes were conducted by 280 aircraft (not including the heavy fighter CAP over the scene).
 
One thing to consider for this scenario: Against both sides of the hull (Musashi) or one side (Yamato)?

In this scenario, let's have the Yamato attacked on both sides (to inflate the numbers) at the same intensity as the Musashi until she is sunk.

Do spar torpedoes count?

I can see it now. Yamato vs 400+ CSS Hunleys armed with spar torpedoes. After the war, Yamato is credited with the most submarine kills of any ship in all of history (mainly by through ramming or by sinking on them). She is the second battleship to ever sink a submarine and beats out the destroyer escort USS England in most submarines sunk by a single ship. The admiral who decided that building that many CSS Hunleys was a great idea is stripped of command, court-martialed, demoted to cadet, and sent to guard the last operational 1.1 inch AA mount against enemy attack for life.

However, unless spar torpedoes were used post-1900, these unfortunately don't count.
 
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