STS51L Accident Questions

wrote:
And so long as I'm on about the Shuttle SRB's... I think using the
single SRB/neo-S-IVb stage for a CEV launcher is a decent option
(insert disclaimer about working for the people who *make* the RSRM
here). Again, in 220 flights, there was not a single catastrophic event
within the SRBs... not many other propulsion systems can claim that.
Also, look at the Challenger: yes, the SRB caused that disaster... but
the SRB's *survived.*

For a broad interpretation of the word 'survived', yes. There's a
pretty big hole in the RH SRB, and a massive performance shortfall in
the same.

So far as structural integrity goes; it was obviously compromised in
the RH SRB. It's an open question as to whether or not the hole would
have eventually grown to the point where the case failed in toto and
the aft end separated from the remainder.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

Herb Schaltegger wrote:

So am I. I have downloaded Daniel's spreadsheet but I've done nothing
more than glance through the data; paying work beckons and all that.
Given Scott's current job and his experience with solid rockets
generally, his comments are very interesting. I further appreciate
his willingness to suspend any urge towards editorializing to discuss
the information actually available rather than shooting the messenger.

The data and discussion is fascinating; but the question I started out
this subthread with still stands: Other than an interesting exercise
in data analysis; what's the *point*?

Daniel still won't come clean on exactly what he's trying to
illustrate here, and I reject his "if it isn't obvious to you, you are
part of the conspiracy" thesis.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

OM om@our_blessed_lady_mary_of_the_holy_NASA_researc h_facility.org
wrote:

On Mon, 07 Mar 2005 14:29:16 -0600, Herb Schaltegger
wrote:

I have downloaded Daniel's spreadsheet...

...So did I. I fail to see what's interesting about his gambling
debts.

The rest of us are having an adult discussion. Your slanderous input
is not welcome.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

Pat Flannery wrote:
wrote:

Slag is a constant issue. 12.5 sps is enough to pick it up and
recognize it, but you'd want faster data rates for better
characterization AND for dealing with unknown types of pressure
blips.




What's the origin of the slag? The igniters?

Aluminum powder is the actual fuel. Three basic components... aluminum
fuel, ammonium perchlorate oxidizer (Stewart! You fool!), and PBAN.
PBAN is a binder material, kinda like rubber. Not used much these
days... today most rockets use HTPB. There are hopes of converting the
RSRM to HTPB, but that would probably come with a Shuttle Derived
program.

Where the aluminum slag comes from is incomplete combustion of the
aluminum. The stuff melts, globs together, and then the surface
area/volume ratio means there's no time to consume it all. There have
been hopes that nana-aluminum (extremely fine) powder might solve this,
but it's dubious. It actually seems that the optimum particle size is
jsut about what's typically used anyway.

Isn't it true that you and Catherine
Zata-Jones have been seen together ...

Umm... eww. No. Too skinny.

Have you no shame, Mr. Lowther?


Well, no. Not really.

On 8 Mar 2005 12:06:42 -0800, wrote:

Isn't it true that you and Catherine
Zata-Jones have been seen together ...

Umm... eww. No. Too skinny.

....Hey, if Henry's info was found in Paris Hilton's cell phone, why
not you and CZJ(*)? Or Callista Flockup?

(*) Boy, don't those initials sound like the other name for Mad Cow
Disease? :-)

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr

In article ,
Pat Flannery wrote:

wrote:

Slag is a constant issue. 12.5 sps is enough to pick it up and
recognize it, but you'd want faster data rates for better
characterization AND for dealing with unknown types of pressure blips.




What's the origin of the slag? The igniters?

Pat

Probably fuel that's incompletely oxidized and clumps.

--
Herb Schaltegger, B.S., J.D., GPG Key ID: BBF6FC1C
"The loss of the American system of checks and balances is more of a security
danger than any terrorist risk." -- Bruce Schneier
http://dischordia.blogspot.com
http://www.angryherb.net

On Tue, 08 Mar 2005 20:04:15 GMT, (Derek Lyons)
wrote:

The rest of us are having an adult discussion. Your slanderous input
is not welcome.

....Nor is your fraternizing with the enemy. You, of all people, I'd
have expected this the least from, considering the training you and I
both had.

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr

On Tue, 08 Mar 2005 20:03:16 GMT, (Derek Lyons)
wrote:

Daniel still won't come clean on exactly what he's trying to
illustrate here, and I reject his "if it isn't obvious to you, you are
part of the conspiracy" thesis.

....And if this doesn't prove my point as to how dealing with *any* of
the M*****s is nothing but a complete and utter waste of time, I dunno
what will.
OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr

On Tue, 08 Mar 2005 14:40:28 -0500, Chuck Stewart
wrote:

The motor... aluminum perchlorate.

....Otherwise known as metamucil.

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr