Re: The dual oppsosing brake rotor system in space

"Spaceman" <spaceman@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
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Greg Neill wrote:
"Spaceman" <spaceman@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
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hhc314@xxxxxxxxx wrote:

When you brake the spinning objet its momentun is of course
transferred to the mass doing the braking.This is not exactly
rocket science or Einstein's theory of Special Relativity.

So,
If I time the brake pulses I should be able to get the disc
to move in a direction.
One brake to create the off center spin and one brake
to throw that off center again at the correct time to create
forward (although wavelike) motion and of course
momentum will be conserved and produce motion
from "motion" just like it should be able to do when
thought out correctly.

If the brake and rotor form part of a closed system
then no, you won't get net motion of the center of
mass. Your assmenbly may wobble about its center of
mass, or the brake assembly start to rotate about it
while the rotor slows, but no overall translational
motion of the ensemble can occur. Conservation of
momentum.

Do you agree that the single braking will cause
the shift of center of spin?

No, I don't think it will. The brake mechanism must
be anchored to the assembly supporting the rotors
(and motors if they were used to spin up the rotors).
The braking friction on one brake will cause a torque
about the center of mass, so the whole assembly will
begin to rotate about the center of mass. If the
brake were supported externally that would be a
different matter.
.

Relevant Pages

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  • Re: The dual oppsosing brake rotor system in space
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    (sci.physics)
  • Re: The dual oppsosing brake rotor system in space
    ... transferred to the mass doing the braking.This is not exactly rocket ... If I time the brake pulses I should be able to get the disc ... forward motion and of course ... If the brake and rotor form part of a closed system ...
    (sci.physics)
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