interesting insight about inverted endcaps

The thin skin issue makes sense. Note, though, that the radiator belt is not included in the Kalpana One paper calculations.

Probably the safe thing to say is that given flat end caps the length must be somewhere around 300 m for rotational stability a bit more or less depending on the details of the interior mass distribution.

On Aug 15, 2014, at 10:55 AM, Joe Strout joe@... [spacesettlers] wrote: