<html><body><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></body></html>