I've asked the following Hellcat question before and got no answer, so I thought I'd ask again....   It is stated that the F6F-5 introduced a redesigned engine cowling which fitted more tightly around the engine and reduced drag, contributing to the variant’s improved performance.   Looking at drawings and photos, I can’t perceive any difference between a late production F6F-3 Hellcat Mk l (minus the lower flap and exhaust fairing) and an F6F-5 Hellcat Mk 2 cowling. If you we