Thanks, guys -- good advice and good film.  I actually DID take off Corsair with 100% fuel, rockets, and two 1kers from cv.
However, only after pranging in another dozen, and the pouty people at Chance Vought refusing to send me one more F4U until the skipper guaranteed I wouldn't make any more artificial reefs with them.
I did try all sorts of things to understand exactly what needed to be done.  I succeeded only with full flaps (past even the last indicator, must be world's deepest flaps), WEP, and -- letting it roll back to the end of the deck first.  
I still find it hard to believe that the real Corsairs were that hard to get off a carrier.  
Or, for that matter that the Corsair was regarded as such a hotshot and used so long after WWII.  
It does not seem that formidable in Aces High.  Many other fighters can lunch on it in a dogfight.  
Oh well, still very satisfying to finally launch a max hvy F4U from a cv.  Thanks again for the coaching.