Re: cheap lunar gear & base (spin-off of superhero flight)

On 16 apr, 00:40, Michael Ash <m...@[EMAIL PROTECTED]
> wrote:
> Crown-Horned Snorkack <chornedsnork...@[EMAIL PROTECTED]
> wrote:
> >> CO2 is harder. But easily handled by bubbling air thru a calcium
> >> hydroxide solution.
>
> > Still bad. Because then you will run out of oxygen. Breathing centre
> > senses excess carbon dioxide, not lack of oxygen.
>
> Your breathing is driven by the level of CO2 *in your blood*, which will
> still become appreciable even when breathing air which has none. As
should
> be fairly easy to see, otherwise anyone breathing pure oxygen would
> suffocate.
>
> You still have the problem of detecting when O2 levels become too low,
but
> that's a separate problem. Starting from a reasonable pressure, you can
> lose a lot more O2 than you can gain in CO2 before it becomes dangerous,
> and if O2 is the only significant input into the system then you can
> regulate O2 levels simply by monitoring air pressure.
>
But if the significant input is air, then you can have oxygen
exhausted while nitrogen builds up.