Once you're airborne you're part of the airmass and moving with the airmass. Your ground speed becomes irrelevant for purpose of lift, as you've amply demonstrated.
"Wind died" implies that wind speed relative to the ground would change.
But whatever caused the massive airmass to alter velocity would impact you as well, right?
So my intuitive assumption is that while sudden air motions might disrupt you and flail you around, I'm not sure you would actually stall and fall down from loss of lift strictly because "Wind died down". (though you might be slammed into ground).
Any thought from anybody with more flight hours and aerodynamics theory than me? :->
It'd be like a microburst. Not so much the way the airmass moving fast is somehow different than the plane moving fast in a still airmass… more that it's a sudden change IN the state of the plane in the airmass. If the air suddenly stopped moving past the plane, that doesn't mean the plane suddenly starts moving past the airmass (ignoring its own inertia relative to its position in the world) to make the same airspeed.
Instead, if the airmass suddenly changes velocity, the plane stays in position, stalls, and drops like a rock. It's the rate of change that'd get ya: if it changed velocity very very slowly, you'd end up just zipping forward and not stalling at all. But the airmass suddenly reversing, that'd stall you immediately.
Not a pilot, but trained in physics. To a certain extent, what you say is true. However, the aircraft also has inertia, so if the wind suddenly dies, the aircraft doesn't simply surge forward to maintain its airspeed. It is inclined to stay where it is and the amount of air flowing over the wings will consequently drop. Constant wind is easy and can be treated more or less as you describe, but gusty variable wind can and will cause problems.
Once you're airborne you're part of the airmass and moving with the airmass. Your ground speed becomes irrelevant for purpose of lift, as you've amply demonstrated.
"Wind died" implies that wind speed relative to the ground would change.
But whatever caused the massive airmass to alter velocity would impact you as well, right?
So my intuitive assumption is that while sudden air motions might disrupt you and flail you around, I'm not sure you would actually stall and fall down from loss of lift strictly because "Wind died down". (though you might be slammed into ground).
Any thought from anybody with more flight hours and aerodynamics theory than me? :->