I now realize that we/I have managed to thoroughly hijack two different @Whack_a_Mole threads about airplanes. And that my long-winded post above really only makes sense to laymen within the context set in WaM’s other thread:
So I’m guilty of using acronyms and ideas without introduction, just as I gently chastised @Gray_Ghost for. Whose name I also misspelled last time.
Oops on me.