This. For example, the Brits had developed more efficient engine designs which they reused in Spitfire which Germany didn't have because they were barred from c

This. For example, the Brits had developed more efficient engine designs which they reused in Spitfire which Germany didn't have because they were barred from competing in seaplane races https://en.wikipedia.org/wiki/Schneider_Trophy https://en.wikipedia.org/wiki/Schneider_Trophy