During the course of research and development on superchargers it became apparent to us that any further increase in the altitude performance of the Merlin engine necessitated the employment of a two-stage supercharger.
Under processen med forskning og udviklingen af kompressorer blev det klart for os at enhver forøgelse af Merlins ydelse i store højder nødvendiggjorde anvendelsen af en to-trins kompressor.