To meet the increasing demand for Merlin engines, Rolls-Royce started building work on a new factory at Crewe in May 1938, with engines leaving the factory in 1939.
For at kunne møde den stigende ordreindgang på Merlin-motorer, påbegyndte Rolls-Royce i maj 1938 en ny fabrik i Crewe, og motorleverancerne startede i 1939.