[ExI] Reaction Engines in the US shuts down.

[Keith Henson]

On Fri, Nov 1, 2024 at 5:53 PM John K. Strickland, Jr.
<jkstrickl at sbcglobal.net> wrote:
>
> "Moving so Fast"   - do you mean Fusion?

No, AI moving fast and nanotech in the wings.

> We will still need fusion for propulsion if not for energy.
> Think of the mass in Space that would need to be processed to support a million people !

As uploads, probably less than a kg/person for the computation nodes
and a few times that for the power and heat sinks.

The hypothetical inhabitants of Tabby's Star and 24 other dipping
stars might live that way.

Keith

> John S
>
> -----Original Message-----
> From: power-satellite-economics at googlegroups.com <power-satellite-economics at googlegroups.com> On Behalf Of Keith Henson
> Sent: Friday, November 01, 2024 6:37 PM
> To: willdcomstock <willdcomstock at gmail.com>
> Cc: Power Satellite Economics <power-satellite-economics at googlegroups.com>; ExI chat list <extropy-chat at lists.extropy.org>; extropolis at googlegroups.com
> Subject: Re: Reaction Engines in the US shuts down.
>
> On Fri, Nov 1, 2024 at 2:15 PM willdcomstock <willdcomstock at gmail.com> wrote:
> >
> > Keith,
> >
> > Starship, New Glenn, and Stoke Space will do just as well if not better than Skylon. As sad as it is to see, the future is still very bright!
>
> Maybe.  A NOAA study showed that Skylon could support a power satellite project without too much damage to the ozone.  The same study has not been done for methane burners.
>
> But things are moving so fast that it is not clear that power satellites will be needed.  Or that people will move into space in substantial numbers.  (Though they might do it as uploads.)
>
>
> Keith
>
> > Donald Comstock
> >
> > -------- Original message --------
> > From: Keith Henson <hkeithhenson at gmail.com>
> > Date: 11/1/24 5:06 PM (GMT-05:00)
> > To: Power Satellite Economics
> > <power-satellite-economics at googlegroups.com>, ExI chat list
> > <extropy-chat at lists.extropy.org>, extropolis at googlegroups.com
> > Subject: Reaction Engines in the US shuts down.
> >
> > https://www.linkedin.com/feed/update/urn:li:activity:72579656945106534
> > 40/
> >
> > For a long time, Skylon was the only candidate for getting the lift
> > cost down to where power satellites would make economic sense.
> >
> > The US splinter of Reaction Engines was so they could test the
> > precooler at full scale.  Worked fine cooling the exhaust of a J 79
> > engine on afterburner.  That is about the same as ram air at Mach 5.
> >
> > Sigh.
> >
> > Keith
> >
> > --
> > You received this message because you are subscribed to the Google Groups "Power Satellite Economics" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to power-satellite-economics+unsubscribe at googlegroups.com.
> > To view this discussion visit https://groups.google.com/d/msgid/power-satellite-economics/CAPiwVB65WQZfHk2PLGfjKB6Wd21MEhe7S%2BnZ43BWD6TQX5gRRQ%40mail.gmail.com.
>
> --
> You received this message because you are subscribed to the Google Groups "Power Satellite Economics" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to power-satellite-economics+unsubscribe at googlegroups.com.
> To view this discussion visit https://groups.google.com/d/msgid/power-satellite-economics/CAPiwVB5cdZubX%2B52F7UHJmGjNKrraECbzeiRxMbLf%3DUdfDFATQ%40mail.gmail.com.
>