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Ringworld is based on Larry Niven's book of the same name. I came to
know him fairly well back in the days when we both going to Cons
& to English Regency Dancing events. He always struck me as very
stringent in using his science in books. I remember an occasion of
him discussing the physics of it & also mentioning that it was
based on the work of Dyson (of the "Dyson Sphere concept"). So I
suspect that he is probably correct in his assumptions to make the
concept work. Perhaps someone who is more versed in these things can
shed some light on this.<br>
<br>
Sven<br>
<br>
<div class="moz-cite-prefix">On 4/6/2013 12:42 PM, Simon Phipp
wrote:<br>
</div>
<blockquote
cite="mid:1365277321.18970.YahooMailNeo@web161302.mail.bf1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:arial,
helvetica, sans-serif;font-size:10pt">
<div><span>Much as I liked RungWorld as a rules set, some of it
was a little far-fetched, even as Space Opera.</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span>Having atmosphere 500 miles up?
According to Wikipedia, the stratosphere has a pressure of
1/1000th Atmosphere and stretches to around 32 miles, the
mesosphere extend to about 53 miles, and the Thermosphere
above that extends to around 240 miles and contains
satellites and the International Space Station. </span><span
style="background-color: transparent;">Also, atmosphere
boils away into space unless protected by having gravity.
Something that generates a gravity effect through rotation
would, I assume, continually throw its atmosphere away quite
quickly.</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;"><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;">I am sure there is an explanation for this, as
with any futuristic invention.</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;"><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;">As for the Ironclad Great Troll Paratrooper,
he could jump out at altitude, freefall happily until it was
time to open his parachute then, gulp, things might go a bit
wrong.</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;"><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;">Simon</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13px; font-family:
arial, helvetica, sans-serif; background-color: transparent;
font-style: normal;"><span style="background-color:
transparent;"><br>
</span></div>
</div>
<br>
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</pre>
</blockquote>
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