What do you think our instruments are for?
It varies depending on the instrument.
The attitude indicator is for measuring the attitude of the plane. This is ideally in relation to "sea level" over Earth, i.e. a roughly spherical shape.
Because of this they were designed with a self righting mechanism.
Why is the Earths surface so important to know as flat
Because you can't handle reality so need to desperately cling to a fantasy.
Look at how the compass is designed and used on a flat Earth.
And where is this fantasy FE I can go to to do so? I can easily see how they are made and used on a round Earth.
It points to the center of flat Earth, and out from the center in an expanding circle.
You mean towards the south pole as it does in the southern hemisphere?
The fact that it points to 2 points should be a big cause for concern for you. But because you have no integrity and don't give a damn about reality, it isn't.
Because you want an excuse
The one desperately looking for an excuse here is you.
So desperate to dismiss a curve that is so easy to verify you need to make the excuse that because you can't measure it in your bath, it mustn't exist at all.
Flying level is always a straight and horizontal path in air, no curved flight paths at all.
That is your baseless lie you are yet to justify in any way.
So far all your attempts have been to blatantly lie to everyone, then flee from the refutation of those lies.
What is measured by planes as level flight, is air pressure measured around the entire plane
i.e. something incapable of determining if the plane is flying in a straight line or a curved one.
i.e. yet again demonstrating you are a lying POS.
To actually say planes fly in curved paths but never measures for a curved path on their instruments, or saying they read a curved flight path as level, because you say it does, is complete bs.
Now try that against the BS you are saying:
To actually say planes fly in straight paths but never measures for a straight path on their instruments, or saying they read a straight flight path as level, because you say it does, is complete bs.
That is exactly what you are doing.
What about a laser level
You mean yet another example that you are a lying POS, because it has been refuted countless times with you just fleeing from those refutations?
Your curve is built on ridiculous stories and goofy excuses, nothing else.
And another pathetic lie, with a side of projection.
The curve is built upon mountains of evidence.
It is part of a model which actually works to describe reality.
Conversely your fantasy of a flat Earth is build upon nothing more than your hopes and dreams and is not supported by any evidence, and doesn't work as a model to explain so much.
Planes don’t
Again, repeating the same baseless assertions will not help you.
They measure for any drift from a level flight
Again, notice the key word? LEVEL!
Not magic flat delusional fantasyland.
They measure for all directions off of level and horizontal flights, up or down or slanted to right or left. That’s why they’re shaped in a sphere, to account for all directions possible in air.
Notice how you left out 2 very big, important directions there?
Turning left or right, i.e. yaw.
If they truly were flying over a flat plane, they could use the 1 instrument for all of it.
But because they aren't, the gyroscope has a self-erecting mechanism that would interfere with the ability to measure yaw. So they use a separate compass for that.
We just ‘naturally curve the plane’ without ever measuring for a curve! Amazing indeed!
They naturally adjust for air pressure, following whatever shape that is.
You can’t understand what it would be like if planes had to fly above a ball Earth with a curved surface
I can, quite easily. Especially because countless planes do.
The one who seems entirely incapable of doing so is YOU!
The instruments on planes couldn’t measure for the curved surface.
Which also means they are incapable of measuring for a flat surface.
i.e. a plane cannot tell if they are flying over a flat or curved planet.
The air pressure would also need to be curving above Earth
Just as you would expect for a round Earth with gravity.
But even if the air curved over Earth, a plane would not fly level to a curved air above a curved surface.
Why not? Importantly, when explaining your BS, make sure you address the instruments planes have, and what difference it would measure and why.
In doing so, make sure you address the fact that they are measuring air pressure, and the direction of down. Not some magical flat reference.
And it would measure as a steady descent on instruments too.
You have had that BS refuted countless times.
There is no basis for it to be a descent.
You can equally lie to everyone by claiming it should measure an ascent.
Given the fact your delusional BS works equally well both ways, the logical conclusion is your BS is wrong.