ADusk and Dawn Obsolete?

On Tuesday, December 3, 2002, at 11:03 AM, Lucio de Souza Coelho wrote:

> On Tuesday 03 December 2002 15:15, Al Globus wrote:
> (...)
>> See
>> http://people.nas.nasa.gov/~globus/papers/RNR-91-018/RNR-91-018.html
>> for one that doesn't.
>>
>
> Interesting!
>
> But shouldn't the cylinders have hemispherical endcaps?
>

That would make the colony much longer and therefor require more
shielding (and total mass). However, the flat endcaps may be
impractical from a strength-of-materials standpoint, but I don't know
how to do the calculations.

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Al Globus
CSC at NASA Ames Research Center
http://www.nas.nasa.gov/~globus/home.html