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##### Flat Earth Debate / Playing with a gyroscope?
« on: July 25, 2014, 02:41:46 AM »
First of all, I don't know if this is the right place for this thread - if not, I apologize; it should be moved somewhere else. There was a pretty similar topic a few months ago here, but it was quickly nuked into off-topic oblivion about perpetual motion, evaporation etc.

Anyways, I think we all(aside from our friend phantom-torque-Charlie) agree that a spinning gyroscope won't change its orientation in space even if the base is moved around, rotated etc if the bearings are smooth enough. Now, two main questions.

How comes the axis(es?) of all gyros on Earth rotate slowly, with the period of rotation being almost exactly one day? Any gyro with its axis orientated in a direction other than the celestial north/south - straight up/down at the poles, due north/south with 0 elevation at the equator, north/south and ~23* elevation at the tropics etc. - has its axis seemingly draw a specific circle, with one full rotation taking a single day. The "latitude" where these circles are drawn on, for example, the casing of the gyro, depends only on the axis' orientation relative to the celestial north/south direction.

If the Earth was flat and spinning under a stationary sun, at 1rpd, all gyros tilted the same relative to the surface would draw the exact same circles. If the Earth was of any shape but stationary, the axis would not rotate at all and point in the same direction unless forced to turn.

And the second thing, quite simple: why, even if the gyro is launched at the equator with celestial north/south pointing axis, if it is moved towards any of the poles - the elevation relative to the ground changes? What would be this mysterious force pushing the axis somewhere on a flat Earth? In a similar way moving in actually any direction causes similar, consistent changes as well.

Now, to sum up: the second point seems to directly point that the surface you move the gyro over is not actually a flat plane, but some other shape; the first point - that the axis rotates in any way with a period of 24h, indicates that the Earth - regardless of its shape - is rotating at 1r/24h. Now, what is your take on this matter? And please, no massive off-top like it happened last time.(If something is not clear, I will try to reword it or try to picture it, English is not my main language).

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