Why havent the Pak killed the Kzinti?

G EddieA95 wrote:
 > FWIW, the RW speed is way in excess of stable orbital speed, that's why it's
 > unstable. So no, you don't assemble at the final speed.

It would be unstable even at orbital speed. That's how we knew, well before
sending probes, that Saturn's rings aren't solid.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

geddiea95.TakeThisOut@aol.com (G EddieA95) writes:
 >That would make sense if the teleportation method was only suitable for
 >inanimate cargoes, i.e., it wrecked havoc on conscious bodies.

We've never seem them use it for short distances either. Pak are brute
force kinda beings.

 >FWIW, the RW speed is way in excess of stable orbital speed, that's why it's
 >unstable. So no, you don't assemble at the final speed.

"Way" as in several HUNDRED times orbital speed. Darn straight you don't. *
--
* PV something like badgers--something like lizards--and something
like corkscrews.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

John David Galt <jdg.TakeThisOut@diogenes.sacramento.ca.us> wrote in message news:<cd1mt4$59q$1@blue.rahul.net>...
 > G EddieA95 wrote:
 >
  >> FWIW, the RW speed is way in excess of stable orbital speed, that's
why it's
  >> unstable. So no, you don't assemble at the final speed.
 >
 >
 >
 > It would be unstable even at orbital speed. That's how we knew, well before
 > sending probes, that Saturn's rings aren't solid.


The second largest dimension of Saturn's rings is it's width in the
radial direction, and that's a large fraction of the ring's radius.
For the Ringworld the second largest dimension is the width in the
azimuthal direction, and is a much smaller fraction of the Ringworld's
much larger radius. Therefore, when the Ringworld was rotating at no
more than orbital velocity, the velocity differences between nearby
parts of the Ringworld were much smaller than those between nearby
parts of Saturn's rings.

I have no idea how big a velocity difference would be too big for a
Pak protector to handle, but putting together an orbital-speed
Ringworld presents problems that are several orders of magnitude
smaller than would be provided by trying to build it at it's final
speed.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

"James Kuyper" <kuyper.TakeThisOut@wizard.net> wrote in message
news:8b42afac.0407142015.39e52703@posting.google.com...
 >
 > I have no idea how big a velocity difference would be too big for a
 > Pak protector to handle, but putting together an orbital-speed
 > Ringworld presents problems that are several orders of magnitude
 > smaller than would be provided by trying to build it at it's final
 > speed.

Of course, building it at final speed would definitely keep other races from
meddling with the construction site. The slightest mistake and you get a few
million tons of scrith plating in the back of the head.
--
Zamboni<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

Yeah, that's right. If Flash Crowd is not a Known Space story my idea
is wrong, but if it is then it's clearly stated in Flash Crowd that
there is no distance limit to teleportation and that momentum is
conserved during teleportation.



Ross Presser wrote:
 > pv+usenet@pobox.com (Paul Vader) wrote in
 > news:10f5clttc6gmec@news.supernews.com:
 >
 >
  >>Where did you get that idea? There's no evidence that anyone in Known
  >>Space, Pak included, have any form of long-distance teleportation
  >>technology.
 >
 >
 > Well, it did exist in the Flash Crowd universe. Drop ships, it was called.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

Well you wouldn't have to build it while the parts are spinning at
770mps. You could build it either stationery or at normal orbital speed
and then spin it up with power from matter teleported in with a relative
velocity difference that was a significant fraction of c.

Paul Vader wrote:

 > Julian Treadwell <julian.t DeleteThis @ihug.co.nz> writes:
 >
  >>So... the material was teleported in from another system. And ... this
 >
 >
 > Where did you get that idea? There's no evidence that anyone in Known
 > Space, Pak included, have any form of long-distance teleportation
 > technology. Why would the Pak be travelling around in Bussard Ramjets in
 > normal space if they had something like that?
 >
 >
  >>is the clever bit ... if that other system had a substantial relative
  >>difference in momentum, then, because KS teleportation conserves
  >>momentum, the matter would arrive with oodles of surplus energy - enough
  >>to spein up the ring.
 >
 >
 > We've been over that - it's too wacky to contemplate. You can't build a
 > structure while the parts are spinning at 770 miles per second. *<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Why havent the Pak killed the Kzinti? 

Julian Treadwell <julian.t RemoveThis @ihug.co.nz> writes:
 >Well you wouldn't have to build it while the parts are spinning at
 >770mps. You could build it either stationery or at normal orbital speed
 >and then spin it up with power from matter teleported in with a relative
 >velocity difference that was a significant fraction of c.

Perhaps, but I didn't get the impression that was the idea being
presented. A number of people posted suggested building it spun up, which
is like trying to build a house of cards while sitting in a centrifuge. *
--
* PV something like badgers--something like lizards--and something
like corkscrews.<!-- ~MESSAGE_AFTER~ -->
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Julian Treadwell wrote:
 > Yeah, that's right. If Flash Crowd is not a Known Space story my idea
 > is wrong, but if it is then it's clearly stated in Flash Crowd that
 > there is no distance limit to teleportation and that momentum is
 > conserved during teleportation.

It's not, though it was the first story with the transfer booth.

In fact, FC was commissioned by Silverberg for his "Three Trips in
Time and Space" collection.<!-- ~MESSAGE_AFTER~ -->
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