The Hatsuyuki machinery arrangement exposes the engineering compromise inside an otherwise successful mass-production class. Japan adopted a British-style combined-gas-or-gas system using Kawasaki-built Rolls-Royce Tyne cruise turbines and Olympus high-speed turbines, producing roughly 55,000 shaft horsepower and 30 knots. The machinery was quiet and effective for ASW, but its layout did not provide the survivability and redundancy Japanese designers traditionally wanted. British Type 21 frigates prompted similar concerns after the Falklands War.
Notable Point · 1:03:37-1:04:42
Hatsuyuki trades machinery redundancy for compact mass
The Hatsuyuki class delivered quiet gas-turbine escorts in numbers, but Japan judged their machinery arrangement less redundant than its preferred warship standard.