I have used no big equations. Just simple addition and subtraction.
Let us forget about the airplane and traveling speeds. Let us just do an example with distance so the concept could become clear.
Your house is ten miles east of school. The store is ten miles east of you house. How far apart are the school and the store?
We know that 10+10=20. The store is 20 miles from the school. Now if you told someone at the school to go to the store and just told them it is 20 miles away, they wouldn't know the direction to go in because you left out a key pieceof information. You need to tell them 20 miles east.
Now if you are traveling 10 mph east now you want to go 10. Mph west, you need to change your velocity by 20 mph. 10 mph to stop going east and 10 mph to start going west. If you only change your velocity by 10 mph, you would be stopped.
Theissue appears to be jumping around in reference frame. Each observer has his own reference frame.
Ok, I'm going to put it very plainly to you and the rest of your crew.
When the plane travels AGAINST the 1000 mph rotation, it CANCELS out the 1000 mph atmosphere that would have normally took it around the earth in unison with the solid ground. Ok so far?
So now, the earth under the plane to the pilot is whizzing by at 1000 mph and his air speed indicator says 1000 mph, so he can also assume his plane is doing 1000 mph. Basically if he didn't look at his air speed indicator or it was broken and reading 0mph, he could assume he was hovering and it is the actual earth that's moving at 1000 mph under him.
Have you got this, so far?
Do you see how silly this is getting?
Can you not see how they fill your head full of garbage and make you believe this stuff?
NO?
Ok, then, let's move on.
Now remember. The plane has CANCELLED out the 1000 mph atmospheric drag against it by going at 1000 mph AGAINST that atmosphere, so basically its nullified it and the atmosphere cannot drag the plane back like the earth does with the atmosphere, because what supposedly took millions of years for the earth to achieve in picking up this atmosphere...the plane has nullified it quite quickly.
So all the plane is dealing with now, is a rotating earth...OR...a speeding plane, depending on what the pilot with the broken speedo decides, as he can take his pick, yet he want's to find out, so the best way to do this, is for him to test out whether it's his plane, or it's the moving earth.
To do this, he turns his plane around and goes WITH the rotation of the earth, still at 1000 mph. It doesn't matter whether the turn takes any speed away , because, as I said, he already nullified the atmospheric resistance of earth/atmosphere,drag.
So now he executes his turn and is now going at 1000 mph along with the earth's 1000 mph rotation and what does he see?
Well, he sees that his plane is going at 1000, which you would expect him to see.
What he should see...if your rotating globe is correct, is his plane hovering above the ground, as if he was in a hovering helicopter...which he does not.
Now before you jump in...have a real good think about what I've just said and we will go on from there, where you will call me stupid or something or I don't know how physics works and all that baloney..then you will most likely use a train or some kind of tin can contraption to try and boggle peoples minds into actually believing I am a total nut job that knows nothing.
I'm telling you this, so it saves you typing it all out, because I'm generous and kind hearted, like that.
Over to you.