8. Maintenance-Heavy Engines
The Rolls-Royce Merlin engine, while powerful, was complex and required frequent maintenance. Its intricate design, comprising over 14,000 individual parts, made it challenging to mass-produce and maintain efficiently (jrcengineering.com). In contrast, German and American engines, such as the Daimler-Benz DB 601 and the Allison V-1710, featured simpler constructions and more reliable fuel systems, leading to reduced maintenance needs and increased operational readiness.
