Quote (russian @ Jul 25 2017 03:55pm)
A basic accelerometer is just a mass (like a ball) with some sort of resistance to movement, like springs. The basis for it is Newton's First Law. You can't "set" an accelerometer to any kind of a plane, it cannot measure position or orientation - only acceleration. If there's no acceleration, it will read 0 regardless of where you are or how you hold it. Your idea about measuring orientation in one city, flying to another, and measuring the orientation there is pure nonsense. When you are standing still in either city, an accelerometer will not measure anything other than the acceleration due to gravity, which will point to the center of the planet in both places. You think that the accelerometer in a phone will somehow remember the orientation of the phone in the other city and will show that it's skewed, which clearly indicates that you have no clue how the technology works. The phone only understands orientation thanks to the pull of gravity, which will be the same in both cities.
There's no way to "turn off" an accelerometer either, except maybe by physically locking the movable mass. The only thing you are turning off is the device that reads the output of the accelerometer.
An object at rest, which begins to fall, will fall distance equal to time passed squared.
All you need is a way to track "time passed" since fall begins, and you can easily calculate velocity/distance/mass, with a pencil and paper and the ability to count.
Don't engage.
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