OP here. * spits out mud, toads, pieces of bog, silt *
Looking at this, now: Sensory illusions in aviation - Wikipedia
I really wish I was in a plane with these things being explained. I understand, I think, “the leans,” (understand as in some sort of real-world acquaintance). The money quote about “up,” is here, from Wiki “Graveyard spiral”:The pilot mistakenly believes he or she is flying with the wings level, but with a descent indicated on the altimeter and vertical speed indicator. This usually leads to the pilot “pulling up” or attempting to climb by pulling back on the control yoke. In a banking turn, however, the plane is at an angle and will be describing a large circle in the sky. Pulling back on the control yoke has the effect of tightening that circle and causing the plane to lose altitude at an increasing rate, like water swirling in a drain or funnel. An increasing component of the lift being generated by the wings is directed sideways by the bank angle, not only pushing the plane “upward” into the turn, but reducing the amount of lift which is holding the plane up. At that point the aircraft is describing a descending circle or spiral, with a flight path that again resembles being in a funnel. In the ever-tightening, descending spiral the aircraft eventually exits the base of the clouds and/or impacts the ground.[1]
But I’m having trouble “feeling” it, I think for the following reason, which I put here because I don’t think I’m that different than any other confused non flyer: I visualize “turning left” in the sky like a kid vrooming his toy car in one direction, then, you know, turns it. (Yaw only, a handy diagram now tells me.) Whereas, for some reason, I know that “going up” is not translation only along one axis, and involves a roll.
Given that–and here I actually tried, as Mrs. Bloom watched, to be a plane in a slow roll-angle, and hold that position while trying/thinking about pitching up, while letting the physics process in my brain. Surprisingly (heh) I didn’t “feel it,” intellectually, the “up” causing the down. Then tried to do it, simpler but less impressive for my wife, with palm and outstretched thumb. Still no joy, which annoys me, because I’ve been on a bicycle and you’d think one more dimension and some pressure constraints wouldn’t be that hard to add.
I’ll go hit some YouTube, see what comes up.