Why leave the atmosphere with an air-breathing engine? There is more than
Oxygen in the Air, it's mostly Nitrogen it's useful too. Of course you want
to carry it up and back.
On Sat, May 25, 2019 at 4:43 PM Rand Simberg <simberg@xxxxxxxxxxxxxxx>
wrote:
It doesn't matter that oxygen is heavy. You get rid of it pretty
quickly. An airbreathing engine is heavy, too, and you have to carry it
the whole way up and back. And time that you're wasting breathing oxygen
On 2019-05-25 16:19, Craig Fink wrote:
Hi Rand,
It's been a while, how are you doing?
