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Old October 13th 17, 12:39 AM posted to sci.space.policy
Alain Fournier[_3_]
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Posts: 548
Default Magnetohydrodynamic Space Drive

On Oct/12/2017 at 10:26 AM, wrote :
On Wednesday, October 11, 2017 at 1:00:17 PM UTC-4, Fred J. McCall wrote:
wrote:



Gravity doesn't work like that.


Are you saying an asteroid has no gravity?


No, I'm saying what I said and you're still a nitwit loon.


--



Making the Gravity Anomaly Glider does not have to be an aviation
record design. It would be allowed to use helium lift
boosting and it could be unmanned.

The question becomes the restriction of wind conditions. Mybe
1 to 2 mph wind would be allowed. Takeoff would be with a
drop-able gas motor-propeller.

Balloonists likely have no notice of this anomaly because
it would be felt as a slow wind vector.


That's a cool idea you have there. Unfortunately it won't work.

No it wouldn't be felt as a slow wind vector. It merely changes
very slightly the direction of vertical. The atmosphere experiences
the same small offset of the direction of vertical, meaning that
air pressure decreases the most in a direction that is not quite
equal to the direction of the centre of the Earth. So instead of
falling towards the centre of Earth you fall in a direction a
little different that happens to be the direction of air pressure
decrease, like always. From the glider's point of view, the exact
position of the centre of Earth doesn't matter much. What is
important is the direction of gravitational verticality.

Note that the direction of gravitation verticality changes because
the world is somewhat a ball. So when you move around the direction
of the pull from Earth changes. That doesn't help the glider because
the direction of the decrease in air pressure is always the same as
the direction of gravitational verticality.


Alain Fournier