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<div class="moz-cite-prefix">On 2020-05-27 11:43, spike jones via
extropy-chat wrote:<br>
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<p class="MsoNormal">> <b>On Behalf Of </b>Giulio Prisco
via extropy-chat<br>
<b>Cc:</b> Giulio Prisco <a class="moz-txt-link-rfc2396E" href="mailto:giulio@gmail.com"><giulio@gmail.com></a><br>
<b>Subject:</b> Re: [ExI] 60% go for launch<o:p></o:p></p>
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">>>…If
the weather holds, Space-X will make history today: the
first private company to launch proles into orbit.
Current forecast, 60% chance for a go. Launch scheduled
for 16:33 EDT. Good luck, Elon!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">>…Kudos to Elon for getting this
far. I'll be glued to the screen… Giulio<o:p></o:p></p>
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<p class="MsoNormal">Giulio, there’s another reason I am
really cheering for SpaceX. In the rocket world, we have
long known it is expensive as all get out have one-use
rockets. If they are solids, you might have the option of
dropping them into the sea and recovering, then
refurbishing, but that isn’t a great option, and doesn’t
work with liquid stages, which are huge investment in
each.<o:p></o:p></p>
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<p class="MsoNormal">In the controls world, we realized back
in the 80s that a fly-back first stage landing on its own
feet had become technologically feasible, but NASA being
the ever-cautious government body, never chose that
option. That feet-first landing business was ever so much
more dignified than having to be fished out of the sea.
From a controls perspective, oh my what a marvelous feat
it is. I went most of my adult life hoping someday we
would see someone somewhere try it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Well, here we go.<o:p></o:p></p>
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<p class="MsoNormal">I have friends who still work out at
the cape. I talked to one yesterday, who is my age and
lived right there the whole time, in the 60s. He has seen
it all, and definitely agrees: seeing two liquid boosters
come down feet first and land next to each other is the
coolest thing he ever saw. As a controls engineer, I can
never get enough of it.<o:p></o:p></p>
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<p class="MsoNormal">spike<o:p></o:p></p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
extropy-chat mailing list
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<a class="moz-txt-link-freetext" href="http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat">http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat</a></pre>
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<p>Seriously though, as an early-career controls engineer in
aerospace, that landing was one of the things that got me enthused
about what is happening in the field and what is yet to come! It
is good stuff!. <br>
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