Bizjet, any chance you could give me the Vref speeds for 3 weights (say 30,000 lbs, 35,000 and 40,000 lbs, or for some other suitable light, med, and heavy weights)? Then I'm interested in comparing the 601 speeds for the same 3 weights.
If I'm correct, the 604 certification was to 1.23 Vsr while the 601 was to 1.3 Vso. Since they have the same wing, interesting to see if the speeds match up.
Sorry to hijack the thread Atlantic, but I think you've got a very fine answer.