Originally posted by Grits
Sooo....how fast is our F6F? What alt is the 409-412 speed at? I've always wondered why the F6F was so much slower than the F4U, I thought since the Aces of the Pacific days when looking at the data that it shouldnt be that much slower.
The Corsair (-1D) and Hellcat had virtually the same power plant and propeller. How can the Hellcat be slower?
The Hellcat was heavier.
The Hellcat had a greater drag coefficient due to:
greater fuselage cross section
greater wing area than Corsair
rougher skin (Corsair used new flush spot welding techniques)
wing fairings (Corsair had none due to wing crank)
Also comparisons need to be in the same configuration. Both the Hellcat and the Corsair were faster when "clean", i.e. all the bomb pylons and shackles removed. (e.g. F4U-1D 8mph faster on the deck just by removing bomb pylons)
All that being said, the 400+ speed would have to be at critical altitude, about 23,400 feet. My data shows F6F doing about 380 at this alt, but this is with fuselage bomb shackles and wing bomb racks, and an engine making slightly less than full rated power. I could see a clean, well tuned Hellcat doing 400+ at altitude under the right conditions. Of course, the F4U-1D would do 417mph at 20K in a clean configuration.