Not sure how official or accurate these are, but I'm sharing it just for the record...
I suspect that the Yu-9/10/12 are simply variants of the Yu-6 family, much like the Mk.48 class. The Yu-6 base variant is Otto-fuel-powered while the Yu-9 is an electric powered torpedo. The Yu-10 is supposedly a high-speed fiber-optic-guided torpedo designed to sink high-performance ships and submarines. Nothing is known about the Yu-12 though.Someone help me out on this - what's Yu-12 all about? We have a 21" otto-fuel HWT (Yu-6), a 21" electric HWT (Yu-10 - probably the model that the Vietnamese fishermen caught, based on the counter-rotating screws typical of modern battery-powered HWTs like DM2A4, BlackShark and F21), a Yu-7 LWT successor (Yu-11) - where does the Yu-12 fit in and is there a Yu-9?
Anyone else notice that the only picture with Chinese characters does not really match the other shots?