#101
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Booster Crossing
Charleston wrote
in message news:JLu7b.50473$cj1.49476@fed1read06... "John Maxson" wrote: Does the report make lucid mention of an unmatched pair on 51-L? Absolutely positively yes. Assuming you can put up or quote from odd-numbered pages in the Appendix at the end of the Flight Operations Report (which were missing in your initial FOIA response, and which therefore I may not have seen yet), I take it that your issue is that both the right hand (JSC's Kranz, et al) and the left hand (MSFC's Lee, et al) were in a position to offer the PC a more plausible explanation for some of the early differences in Pc. You apparently have other FOIA records which make you think that Lee should have offered the PC a half-explanation, *based on unmatched pairs*, for why the right SRB's early chamber pressure was dangerously higher than the left SRB's, perhaps from about t+1.5 seconds through t+20 seconds. (The PC found that *KSC* knew about this unmatched pair, but the PC never tied that to Pc.) -- John Thomas Maxson, Retired Engineer (Aerospace) Author, The Betrayal of Mission 51-L (www.mission51l.com) |
#102
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Booster Crossing
On Mon, 08 Sep 2003 18:33:17 +0000, Charleston wrote:
"Chuck Stewart" wrote: Charleston wrote: He (Mr. Lee) was sloppy above and elsewhere. He did not even lie very well. Are you saying that Mr. Lee lied to the Commission? If so... evidence to back this assertion? Yes. I am saying that Mr. Lee did in fact lie to the Presidential Commission investigating the Space Shuttle Challenger Accident. I would have said it last night but my mouse's batteries died and the spares were still at Costco;-) That's Ok... I'm coming back online just now from a failed motherboard. :\ Obviously much discussion follows... I'll catch up. -- Chuck Stewart "Anime-style catgirls: Threat? Menace? Or just studying algebra?" |
#103
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Booster Crossing
"John Maxson" wrote in message ...
He was comparing *only* R-SRB Pc to its past-performance statistics, essentially giving us a red herring: Not a red herring. To establish your issue, it would have been necessary for Lee to have shown early performance for the *left* SRB as well There is no issue, hence no need to compare past left SRB stats. Look at Balettie. He's stonewalling the greater significance of the Castglance video The castglance vid *has* no greater significance. |
#104
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Chuck Stewart Insists on Libel
JTM's book was written without his objectively thinking through
and researching the very concepts he espouses. And since he has wasted his life since Challenger pursuing it he cannot, absolutely cannot, go back and correct even the most egregious errors. .. .. |
#105
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STS 51-L and the Unmatched SRM pair Was: Booster Crossing
"John Maxson" wrote:
Charleston wrote: "John Maxson" wrote: Does the report make lucid mention of an unmatched pair on 51-L? Absolutely positively yes. Assuming you can put up or quote from odd-numbered pages Why assume that? in the Appendix at the end of the Flight Operations Report (which were missing in your initial FOIA response, They were missing in my initial request as filled by JSC? No, I received the whole document from JSC and received it fairly promptly, IIRC.. I copied the whole document twice. Are you suggesting that you don't have the applicable odd numbered pages and therefore have never read about this critical fact on the unmatched pair? Now, you have since posted (yesterday) that you do in fact have the pages and know there was an unmatched pair. Please explain what you mean because I am not finding this line of discussion helpful, productive or of any real value at all. and which therefore I may not have seen yet), We have discussed those details at length. I take it that your issue is that both the right hand (JSC's Kranz, et al) and the left hand (MSFC's Lee, et al) were in a position to offer the PC a more plausible explanation for some of the early differences in Pc. I believe you have figured out the statistical chicanery on the SRB thrust data pulled off by NASA. Either that or you are real close. I thought you knew it all along. It is a most critical part of any real analysis of the SRB thrust data and goes to the heart of NASA's credibility on the entire issue of SRB thrust data on Mission 51-L. Once you see it the door opens and you can see that behind that door are even more deceptions. You apparently have other FOIA records which make you think that Lee should have offered the PC a half-explanation, *based on unmatched pairs*, His mention of the *five inch motor* gave him away. He stopped himself when he realized what he had said. for why the right SRB's early chamber pressure was dangerously higher than the left SRB's, perhaps from about t+1.5 seconds through t+20 seconds. The right SRB was higher than the left as far out as 50 seconds at least at some points, IIRC. Now it is interesting that you mention a specific timeframe above. (The PC found that *KSC* knew about this unmatched pair, but the PC never tied that to Pc.) I have reviewed a lot of data about the SRB midweight configuration (Dennis Jenkins needs to read the PC report Volume II and correct the third edition of his book on that issue. The associated Engineering Change Proposal (ECP), but never seen anything substantive about the term unmatched pair in the report itself. http://history.nasa.gov/rogersrep/v2appk.htm Page K-13 "A.5. Design and Production Control The MTI configuration control system was reviewed (Referenced Appendix C, Section CC). This system was formulated upon the contractual requirements (MSFC document MMI 8040.12) and is documented by the NASA-controlled SRM Configuration Management Plan and subordinate MTI policies and procedures. The Class I and Class II control systems were addressed; the membership of the MTI Configuration Control Board (CCB) was defined and its authority was addressed. A summary level explanation was provided for each Class I (NASA approval required) authorized change. It was noted that the change (ECP SRM 0995) [K14] establishing the midweight case configuration was certified only by similarity. However, the midweight assembly does not represent a significant redesign, and since its loads and case reactions are between the two extremes demonstrated, verification by similarity was deemed appropriate. The midweight SRM utilizes an aft casting segment identical to that of a standard weight motor with lightweight center and standard weight forward casting segments of a lightweight SRM configuration. The resulting load changes were assessed, and it was determined that they were within previously demonstrated experience; therefore, specific testing was not required." "Finding 5. A change was made to the SRM stack configuration that created the midweight configuration; i.e., a combination of standard and lightweight cases. This change was qualified by similarity. Conclusion 5. The midweight configuration, which was not flown on 51-L, did not represent a significant redesign. Its loads and case reactions were between the two extremes demonstrated, which were the standard weight and lightweight configurations. Each of these configurations were a verified by analyses and ground testing. Therefore, at the time, verification by similarity of the midweight case design was acceptable. The effort to requalify the SRM for flight must include sufficient analyses and ground tests to adequately prove that the redesign of the motor as an entity, and its various components, will satisfy all CEI specification requirements, and operate safely over the total flight regime." I have already mentioned the DAR. -- Daniel Mount Charleston, not Charleston, SC |
#106
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STS 51-L and the Unmatched SRM pair Was: Booster Crossing
Charleston wrote
in message news:2ll8b.52996$cj1.17976@fed1read06... "John Maxson" wrote: No, I received the whole document from JSC and received it fairly promptly, IIRC.. Unless you're now telling me that you lied to me years ago, I suggest that you test your recollection more thoroughly. Now, you have since posted (yesterday) that you do in fact have the pages "The pages?" That's absolutely false. Until your fairly recent E-mail to me (with an attachment, which included only pages 1 through 56), I had never seen pages 20, 32, and 35, or pages 43, 47, 49, 51, 53, and 55. That's as far as I intend to comment publicly about that matter at this time. and know there was an unmatched pair. I've known about that since mid-1986, but not from JSC. I believe you have figured out the statistical chicanery on the SRB thrust data pulled off by NASA. Don't assume. In your line of work, you rely a lot on statistics. It is a most critical part of any real analysis of the SRB thrust data and goes to the heart of NASA's credibility on the entire issue of SRB thrust data on Mission 51-L. "Any real analysis?" That's your eyeglass, hence your opinion. His mention of the *five inch motor* gave him away. I thought you had mentioned a mysterious 'deviation' document. The right SRB was higher than the left as far out as 50 seconds at least at some points, IIRC. You'd better go back and check JSC's attached plot. If this becomes a point of contention, I can E-mail that page around to professionals in the group with a real interest in the truth. If you're referring to some other telemetry, state which/when. I have reviewed a lot of data about the SRB midweight configuration That's not what I had in mind. (As you know, I got into the SRB/ET pedigrees post-1986, via my MSFC FOIA requests.) I was referring to the incomplete PC testimony on right SRM swapping due to left SRM damage (begun by NASA's Bob Lang and Lockheed's Bill Barsh, but never completed by Thiokol's Carver Kennedy). After all was said and done, I never saw any real proof of a matched pair, only hearsay. As I recall, my FOIA research into the pedigrees didn't give me any more of a warm feeling about it than Lang and Barsh. -- John Thomas Maxson, Retired Engineer (Aerospace) Author, The Betrayal of Mission 51-L (www.mission51l.com) |
#107
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STS 51-L and the Unmatched SRM pair Was: Booster Crossing
Charleston wrote
in message news:2ll8b.52996$cj1.17976@fed1read06... "John Maxson" wrote: I take it that your issue is that both the right hand (JSC's Kranz, et al) and the left hand (MSFC's Lee, et al) were in a position to offer the PC a more plausible explanation for some of the early differences in Pc. It's beginning to look this was not your issue. Apparently you were only prepared to argue that Lee "lied to the PC," based on his misuse of statistics in arriving at 51-L R-SRB performance. It looks like you were counting on the MOD's document to reinforce you on this. I believe you have figured out the statistical chicanery on the SRB thrust data pulled off by NASA. Originally you were going to show us that Lee misused statistics to lie to the PC. I want to get you and my opposition here to examine and judge how NASA Headquarters could allow two of its Centers to have *different* "hot" SRBs, each identified by its own set of telemetry and real-time or expert witnesses. Until you (and the three you loaned my book to) get me your answer to this Lee/Kranz inconsistency, I'm taking it that you've thrown in the towel. One 51-L SRB was hotter (either during the first twenty seconds, or from then through the throttle bucket). Which one was "hot" (and during which period)? -- John Thomas Maxson, Retired Engineer (Aerospace) Author, The Betrayal of Mission 51-L (www.mission51l.com) |
#108
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Booster Crossing
When Bill Graham released his video on Feb 1, my opinion was broached
emphaticallly to my son Daniel. On Feb 7, Feynman asked a question that reinforced my opinion. Berndt's hypothesis rests on a cornerstone whose only real scientific credibility depends on whether SRB actuators are within Feynman's area of expertise. |
#109
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Booster Crossing
"Kent Betts" wrote in message
om... John Maxson wrote: When Bill Graham released his video on Feb 1, my opinion was broached emphaticallly to my son Daniel. On Feb 7, Feynman asked a question that reinforced my opinion. So ... John Maxson wasn't sure if the gadget was the thingie that drives the elevons, either? :-) Berndt's hypothesis rests on a cornerstone whose only real scientific credibility depends on whether SRB actuators are within Feynman's area of expertise. "My" hypothesis was arrived at as shown he http://home.houston.rr.com/fancijon/conspiracy.pdf. It also happens to pretty much mirror the overall conclusions reached by the Roger's Commission, but more importantly (and as opposed to John Maxson's hypothesis), it obeys the laws of physics and conforms to what the visual evidence and telemetry show. His hypothesis - in the continued absence of oft-requested flight dynamics analysis - relies on the purported (unverifiable) hearsay of often mythical "experts", the misuse of quotes, and the exclusion of any evidence that won't shoehorn into his predetermined conclusions. This perpetrator's hypothesis has been shown here for a long time (in increasingly strong arguments) to fall apart when the individually weak arguments are linked, hanging by a thread, only to be sliced apart by Occam's razor. Jon |
#110
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STS 51-L and the Unmatched SRM pair Was: Booster Crossing
John Maxson wrote
in message ... Charleston wrote in message news:2ll8b.52996$cj1.17976@fed1read06... The right SRB was higher than the left as far out as 50 seconds at least at some points, IIRC. You'd better go back and check JSC's attached plot. If this becomes a point of contention, I can E-mail that page around to professionals in the group with a real interest in the truth. Here you get a glimpse of the SRBs' Pc levels during the transition from the initial roll maneuver to high Q (JSC's version): http://history.nasa.gov/rogersrep/v3n34a.htm . At t+49: http://history.nasa.gov/rogersrep/v3n35a.htm . -- John Thomas Maxson, Retired Engineer (Aerospace) Author, The Betrayal of Mission 51-L (www.mission51l.com) |
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