5000-hp(?) Insane two-stroke V-12 aircraft engine: The Rolls-Royce Crecy

Piston aircraft engine development during World War II was vigorous (and goverment funded!) and the supercharged V-12 Two-Stroke V-12 Rolls-Royce Crecy was the next step. Single-cylinder and Twin test engines suggested as much as 5000 hp potential. Why didn't the Crecy ever power an aircraft? Join us!