More about the Trento

I really am interested in why the Trento design is so fast. My estimate for the standard displacement is 11,213 tons. The real normal displacement is 12,328.9 tons. The nominal normal displacement is more: 13,114 tons. That may be part of the answer: what I am using is lighter than the real ship. If I use my "optimal Cp" of 0.61, the Trento can make 36.1 knots. That is with 150,000 SHP. I may be giving the Italians more credit than they deserve, as I am using a machinery weight of 54 SHP/ton. Another explanation is that the B/H is pretty high. The designed B/H is about 3.0.