Ah, thank you for your feedback, I think I understand what you mean now. Unless I were to find the Vx and Vy for each aircraft, I can’t definitively say that one aircraft out-climbs the other, but would it be fair to say that if each aircraft climbs according to their flight manuals, the Phantom has the advantage in a sustained climb and then give an explanation of Vx and Vy?
I would like to note, I’ve found that the Phantom slightly out-accelerates the Lightning from 0.65 mach to 0.9 mach, despite the aforementioned disadvantages it’s at with its configuration. I’ve heard from some places on the internet that British flight manuals tend to use modest estimates based on performance data, do you think this may be the case?
Thank you for all of your help.