Originally Posted by
Hokulea
I'm not pursuing this further, it seems pointless.
We're agreed on that.
You've now agreed with my point that it's the speed of the aircraft that's changed, therefore those in that reference frame will feel the change in speed, but then back up your point with the argument that it's ground speed.
I have never disputed that.
It's self-evident, thanks to Newton, that the only speed change a body can detect is acceleration in free space, which in the case of an aircraft implies a change in groundspeed. We learned that in 1728.