Originally Posted by
Hotel Kilo
The 73-800 with the SFP on it has a lower ref speed, than the reg -800. Your point about the NEO having a slower ref speed than the 321 means nothing here. Same wing, just as the 73-800 with SFP has the same NG wing as all the NGs.
So I understand where you're coming from. You're saying that a wing is the airfoil and adding lift devices and wingtips devices that change the performance of the wing having no bearing on whether or not a wing is "new"?