> air being pushed down is actually a side-effect of the lift-creation process, not the cause of it
The turning of the gas is absolutely what causes lift. (Where the Newtonian explanation is misleading is in “neglect[ing] the physical reality that both the lower and upper surface of a wing contribute to the turning of a flow of gas” [1].
Put another way: if you know the mass and acceleration of the gas about the wing, you can calculate lift. (This is impractical for many reasons.)
> a wing in ground effect
VTOL aircraft also experience ground effect due to the fountain effect.
The turning of the gas is absolutely what causes lift. (Where the Newtonian explanation is misleading is in “neglect[ing] the physical reality that both the lower and upper surface of a wing contribute to the turning of a flow of gas” [1].
Put another way: if you know the mass and acceleration of the gas about the wing, you can calculate lift. (This is impractical for many reasons.)
> a wing in ground effect
VTOL aircraft also experience ground effect due to the fountain effect.
[1] https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/a...