Indeed and it should be also pointed out that Dave Hall is a missile guy who
was generally dealing with solids when he provided us with that piece of
wisdom... so a det of a solid is obviously going to be somewhat more exciting
than a liquid unless one of your primary fluids contains a significant quantity
of bond energy like N20 or acetylene. LOX and RP1 need to be mixed pretty
homogenously to provide conditions for a det to propagate.
It also should be pointed out that piston engine "knocking" is detonation, but
the density of the mixture is low enough to not disintegrate the engine
although it is harmful to the exposed engine components.
Troy (who has made solids that have gone high order)
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Ben Brockert
Sent: Monday, 12 September 2016 9:19 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: AMOS-6 RUD
It's nice folksy rocketeer wisdom, but is there any real reason to think there
wasn't any detonation at all? That's a lot of fuel and oxidizer in close
proximity on fire, and a simple tank burst from pressure doesn't make a sharp
boom audible and shaking windows from ten miles away.
And no, it wasn't a BLEVE.
I've also had a detonation on a test stand, and the test stand and engine were
still there. Detonations aren't magic, and it's possible to have a small one.
On Sun, Sep 11, 2016 at 6:32 PM, Randall Clague <rclague@xxxxxxxxx> wrote:
"If you go out to the test stand and the test stand is severely
damaged, you had a case burst. If you go out to the test stand and you
can't find the test stand, you had a detonation." --Dave Hall
On Friday, September 2, 2016, Marcus D. Leech <mleech@xxxxxxxxxx> wrote:
On 09/02/2016 05:01 AM, Aplin Alexander T wrote:
There was a window-rattling kaboom or two. It was an explosion, but
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FWIW, Elon Musk has tweeted to say it wasn't actually an explosion
(and that Dragon would have been able to save itself):
"@scrappydog yes. This seems instant from a human perspective, but
it really a fast fire, not an explosion. Dragon would have been fine."
https://twitter.com/elonmusk/status/771479910778966016
what it *WAS NOT* was a detonation.
When you have a test-stand explosion you can tell the difference
between a mere explosion, and a detonation easily. In the former case,
there'll be burnt, and perhaps mangled, wreckage. In the latter,
you can no longer find the test-stand :) :)
Alex Aplin
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