[ExI] Reaction Engines in the US shuts down.

[Keith Henson]

On Fri, Nov 1, 2024 at 3:29 PM a.p.kothari astrox.com
<a.p.kothari at astrox.com> wrote:
>
> Exactly.
>
> I have been saying for a long time that Skylon system level analysis was incorrect, even if the RE had worked till Mach 5.2.
>
> Keith didn’t believe me.

Please remind me where that was.  I am not averse to going through
highly technical data in great detail.  I did that with the Skylon
performance models.  Skylon just barely gets payload to orbit.  One of
the reasons is the low mass of the engines.

" Turbo-Ram can do all RE promised to do, even if they worked. Many
more issues with RE than with Ramjets which have been proven already.
No need to go that way and do Skylon.
>
For the same performance are these turbo-ram engines more or less
massive than the SABRE ?

Keith


>
>
>
> -------------------------------------------------------
>
> Dr. Ajay P. Kothari
>
> President
>
> Astrox Corporation
>
>  AIAA Associate Fellow
>
> Member, AIAA Aerospace Power TC
>
>
>
> Ph: 301-935-5868
>
> Web:  www.astrox.com
>
> Email: a.p.kothari at astrox.com
>
> -------------------------------------------------------
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>
>
> From: power-satellite-economics at googlegroups.com On Behalf Of willdcomstock
> Sent: Friday, November 01, 2024 5:15 PM
> To: Keith Henson <hkeithhenson at gmail.com>; 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.
>
>
>
> 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!
>
>
>
> 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:7257965694510653440/
>
> 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
>
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