Must say have suspicion about Yoko1 after a brief exchange.
Posts 630, 632, and 657.
He was quoting the static stability requirements of FAR25 in some detail, after stating that there are two types of stability - static and dynamic.
My query was: how did he know the pitch problem behind the MCAS was not related to manoeuvre stability?
He replied requesting a FAR 25 definition of manoeuvre stability.
I then realized that he was just parroting FAR 25, possibly for a reason unknown to me.
It is true that the actual para heading in FAR 25 do not mention manoeuvre stability, but it is everywhere, either implied or directly mentioned, in the controllability and out of trim requirements, and also in the various AC25-7 revisions.
It just seems to me that any pilot claiming detailed knowledge of FAR25 longitudinal static stability requirements would be aware of general manoeuvre stability theory and how it is addressed within FAR25.
May be Yoko1 is part of the infinite monkey typing troop or maybe this particular rabbit hole was not on the agenda.
Just a simple exchange, but from my ex TP background, didn't add up.
Last edited by zzuf; 4th Jul 2019 at 08:53.