The proposed installation has thirty-two Yarrow boilers at 265 psi, arranged in four rooms of eight. Tiger supplies the hull basis, while Parsons turbines replace Tiger's original machinery combination. The intended output is roughly 80,000-85,000 shaft horsepower. A comparison figure of 2,500 horsepower per boiler would produce 80,000 horsepower from thirty-two boilers. That sits between the rough Tiger figure and the higher target used for historical Queen Elizabeth. It is a plausibility estimate rather than a completed machinery design.
Notable Point · 44:23-45:33
Thirty-two boilers and Parsons turbines
The proposed machinery combines four rooms of eight Yarrow boilers with Parsons turbines and an estimated 80,000-85,000 shaft horsepower.