What would be the top three engines in air forces of the world, in service, in the key year of 1940? Whether inline/V-12 or radial, big or small, with provision for prop shaft gun or not. Please tell a bit about your picks.
Flag waving is discouraged![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Flag waving is discouraged