re-post:
You can always replace one of the torpedos you do not use much in game (such as maybe the worthless T-2) with the same values as that "Walter Turbine" torpedo, and copy over any renown and availability data.
Change the T-3 to include the T-2 era. Or replace one of the FAT I or II torps pretty much worthless also.
Thus a simple way to have the infamous torpedo in game.

Be sure to know if it was a 'bubble free' torp (needs an electric model to substitute for).
BTY: TimeTraveler's new tool is great! :P What a time saver for changing those myrad of values. And it is good for the 'hex disabled' modders out there.
UPDATE: That torp used the expermental Hydrogen Peroxide to use as an oxidizer for the fuel. it was tried on under water submarines to acheive much power underwater. I do not know if it produced water bubbles or not. If it did, then is was not much better in performance than the T-1 steam torpedo.