Testing an Admiral-class gas-turbine counterfactual

How many gas turbines could fit in an Admiral-class hull?

There is no useful fixed count without choosing a date and machinery scheme; a combined steam-and-gas plant is the more plausible way to frame the calculation.

The question requires an engineering counterfactual rather than a false exact number. Early Royal Navy gas turbines produced far less power than later versions, so any answer depends heavily on date, plant maturity, gearing, and the steam machinery retained. Combined steam-and-gas propulsion in Tribal-class frigates and County-class destroyers provides the relevant development path. The later County arrangement combined about 30,000 shaft horsepower from gas turbines with another 30,000 from steam, illustrating the rapid growth in turbine output. An Admiral-class installation would require a full machinery design and power target, rather than simply fitting a chosen number of turbines into available space.