[AR] Re: Flying to Orbit with Hydrogen?
- From: Craig Fink <webegood@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Wed, 18 Dec 2019 21:21:15 -0800
On Sun, Dec 15, 2019 at 8:37 PM Henry Spencer <hspencer@xxxxxxxxxxxxx>
wrote:
On Sun, 15 Dec 2019, Craig Fink wrote:
Anybody interested?
With any luck, no. :-) As Doug Jones commented the last time you brought
this up:
"Craig, have you ever worked with LH2?
Would you count the Space Shuttle?
I have, and it is a complete pain
in the ass.
Maybe you weren't doing it right, or wrong? Low on the Learning Curve? Is
it still a pain in the ass? Surely not, as you are probably much higher on
the learning curve.
Every step of the supply chain is expensive,
I'm not sure, are you saying I should not convert the Chevy to Hydrogen?
Google, add to task list, is hydrogen radically more expensive than what
the Chevy currently uses?
slow to react to
demand,
Go on, so i can figure out if i care?
and wasteful.
Opinion, ok, but mine could be different, a bountiful concept. But not
wasteful. That changes with time and invention.
It brings with it all the materials science hassles
of embrittlement,
Maybe you picked the wrong material? I was looking at all kinds of
materials, where is the data? Teflon, various epoxies, Is UV resin good for
liquid hydrogen and liquid helium.
the operational problems of *freezing* air
This is an Oxygen Problem, that is why I put it above Hydrogen in dangerous
Cryogenics.
,
oxygen-enriched liquid air drips and _their_ dangers
I've always consider oxygen more dangerous than hydrogen, you won't get an
argument out of me. Isn't this how it all began? I have Oxygen above
Hydrogen on the dangers list and you disagreed.
, expensive quantities
of helium required for purges and pressurization
You are recovering the helium aren't you? Are you in the market for a
Helium recovery system?
, vacuum and aerogel
insulation,
Vacuums, time functions..no insulation required if you load and go. After
launch, any dripping Oxygen or Nitrogen should be put to good use.
and a dozen other ways in which it is a step far beyond other
fuels.
Yeah, I think you finally get it. Far Beyond any other.
XCOR spent almost a decade learning how to handle LOX, alcohol,
kerosene, and methane IN THAT ORDER before we tackled LH2... and we made
it work but it was difficult for a full-time professional team with
man-centuries of experience."
Do you, or do you not, have a liter or two of LH2 to spare? Next Fourth of
July?
Henry
A blast from past. lol, line by line
--
Craig Fink
WeBeGood@xxxxxxxxx
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