Re: Propellantless propulsion system
From: Joe Strout (joe_at_strout.net)
Date: 01/20/05
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Date: Thu, 20 Jan 2005 15:48:09 -0600 To: sci-space-tech@moderators.isc.org
In article <1106239185.922085.274950@c13g2000cwb.googlegroups.com>,
"daniel.m.v@terra.es" <daniel.m.v@terra.es> wrote:
> I have been talking with people and we think that following this basic
> principle, propellantless propulsion systems can be built because
> angular motion quantity can be transformed in a component of linear
> motion quantity and in another component of angular motion quantity. If
> we isolate the linear motion component whe can build a propulsion
> device.
No, that's not possible. Linear and angular momentum are conserved
separately. The only way you can make something like this work is by
transferring some of the momentum to some other object -- for example,
to the Earth, by braking it with something connected to the ground.
But for a free-floating object, with nothing to transfer its momentum
to, then you'll have no way to change its angular momentum at all;
forget about trying to convert some of it to linear momentum!
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