On 15-11-2012 13:22, Stephen wrote:
> "Bill Pragnell" <bil### [at] hotmailcom> wrote:
>> "Stephen" <mcavoys_AT_aolDOT.com> wrote:
>>> "Bill Pragnell" <bil### [at] hotmailcom> wrote:
>>>> Stephen <mca### [at] aolcom> wrote:
>>>>> Fair point Bill. But Ed said "It should spin in about 12 hours or 24
>>>>> hours or so."
>>>>
>>>> Which is not fast enough for significant centrifugal effects -
>>>
>>> Are you sure, are my calculations wrong?
>>
>> Um, I didn't check. Quick calculation of my own, assuming a torus minor diameter
>> the same as the earth, which gives a major radius of about 6 earths (~77,000km),
>> spinning once per 12 hours, I get a centripetal acceleration of about 1.6
>> ms-2... ok, a bit more significant than I thought, that's about 1/6th of a g
>> more on the inner surface and less on the outer surface.
>>
>
> Oops! I forgot to divide bt 9.81 and called m/s^2 g :-(
>
>
>> Athletes from the inner provinces would trounce their opponents from the outer
>> lands :)
>>
>>>>> Personally I prefer the Culture Orbitals. ;-)
>>>>
>>>> Me too. Mostly for the amenities :)
>>>
>>> And the snappy repartee. ;-)
>>
>> and let's not forget the parties!
>
> If you can remember the parties then you wern't there. ;-)


I see that on my travels, jumping through hoops with my spacecraft, I 
missed all the fun... :-)

Thomas

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