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- Number: 1391 Name: SPINNING RING QUESTION
- Address: J.E.D.CLINE1 Date: 901126
- Approximate # of bytes: 3780
- Number of Accesses: 27 Library: 5
- Description:
- Considering a horizontally spinning ring which
- has all points going faster than the tangential velocity
- necessary to overcome the pull of gravity at that
- orbital distance from center of Earth.
- Keywords: ring,spinner
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- Number: 1390 Name: KELSODB3.ARC
- Address: R.REEVES10 Date: 901126
- Approximate # of bytes: 49140
- Number of Accesses: 11 Library: 3
- Description:
- This the third of three ARCs containing parts of Major Kelso's satellite
- database. This ARC contains data files for all satellites launched from
- 1981 through 1990.
- Keywords: satellite, database
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- Number: 1391 Name: SPINNING RING QUESTION
- Address: J.E.D.CLINE1 Date: 901126
- Approximate # of bytes: 3780
- Number of Accesses: 27 Library: 5
- Description:
- Considering a horizontally spinning ring which
- has all points going faster than the tangential velocity
- necessary to overcome the pull of gravity at that
- orbital distance from center of Earth.
- Keywords: ring,spinner
- ---------------------------------
-
- File: SPINNING RING QUESTION
- File Ready. 7 Bit Text.
-
- Press <RETURN> to skip, <D>ownload, or <Q>uit.
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- SPINNING RING QUESTION November 25, 1990
- by James E. David Cline
- Here is a puzzler on what seems to be a potential space
- transportation device. Of course it can't work, but why not?
- Let's mentally create and evolve the device: picture a
- horizontal evacuated tube, say, one yard long. At each end
- place a sufficiently powerful reflector, and let a stream of
- mass bounce back and forth between the reflectors,
- travelling in the evacuated tube. The mass stream is
- travelling at or above orbital velocity, say 20,000 mph at
- sea level, along its horizontal path.
- Since the mass stream is travelling horizontally and at
- orbital velocity, it is effectively in orbit around the
- Earth and thus it adds no weight to the device, right?. If
- the mass stream is travelling above the orbital velocity for
- that distance from Earth center, then it would appear to
- have negative weight, and thus able to exert a lifting force
- upon the device containing it (the tube with the
- reflectors) since the tangential velocity would be greater
- than that necessary to overcome the gravitational attraction
- of the Earth.
- To reduce the power needed for the end reflectors, make
- the mass stream path bounce along an equilateral triangle,
- needing 3 reflectors. And then between 4 reflectors forming
- a square. Carrying this process of adding sides to the
- polygonal path, we reach a limit of a circular shape,
- requiring minimal reflector strength.
- Continuing to modify this device, let the mass stream
- become a solid spinning ring, spinning in a horizontal path
- at or above the speed of orbital velocity (at sea level,
- say, where the gadget is being tested) within an evacuated
- toroid. Make the spinning ring of material of sufficient
- tensile strength and diameter so as to not break up. Since
- all points on the spinning ring are travelling in orbits
- around the Earth, the ring would appear to have no weight;
- and if its speed is increased even faster, it would even
- exert lift force on the evacuated toroid it travels within
- (again, the velocity of each point on the horizontally
- spinning ring is greater than the velocity tangent with
- Earth's center needed to balance out the pull of gravity
- there), assuming very low friction electromagnetic bearing
- surfaces between toroid and spinning ring. If the upward
- force exceeds the weight of the evacuated torus, up it goes!
- (Of course, we know it couldn't go up, for that would be
- like anti-gravity, and we know that is impossible. But why
- won't it work? That is the question.) Has anyone carefully
- measured the weight of a horizontally-spinning gyroscope,
- before and after spin-up?
-