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Old June 13th 18, 06:12 AM posted to rec.arts.sf.science,sci.astro,sci.physics,sci.space.policy
Fred J. McCall[_3_]
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Posts: 10,018
Default Towards routine, reusable space launch.

Alain Fournier wrote on Tue, 12 Jun 2018
20:08:10 -0400:

On Jun/12/2018 at 5:36 PM, Fred J. McCall wrote :
Doc O'Leary wrote on Tue, 12 Jun
2018 15:00:13 -0000 (UTC):

For your reference, records indicate that
Fred J. McCall wrote:

Doc O'Leary wrote on Mon, 11 Jun
2018 22:35:20 -0000 (UTC):

Chicken and egg. The fact is that we *do* sometimes have to
elaborately engineer spacecraft in order to make them small enough to
fit into a nose cone or payload bay of a rocket.


Head and ass. Cite for such payloads? Be specific. You're posting
into a 'sci' newsgroup. Handwavium is not sufficient.

Then I must say I note a lack of citations for your own claims.


I haven't made any claims.


Mine
are easy enough to demonstrate. I can literally link to just about
*any* payload that unfolds to deploy as evidence. Let’s start with
the obvious:

https://en.wikipedia.org/wiki/James_Webb_Space_Telescope#/media/File:JWST_launch_configuration.png


Not a good example. Things like solar arrays are launched folded
because they can't take acceleration without snapping off, not because
they're 'too bulky'. Try again?


The telescope is folded, not only the solar arrays.


And THAT is because you cannot make a single mirror that large to
adequate precision, so once it's in pieces you might as well fold the
sucker up.


--
"The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore,
all progress depends on the unreasonable man."
--George Bernard Shaw