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Conference 7.286::space

Title:Space Exploration
Notice:Shuttle launch schedules, see Note 6
Moderator:PRAGMA::GRIFFIN
Created:Mon Feb 17 1986
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:974
Total number of notes:18843

381.0. "Shuttle SRB Test Failure" by MONSTR::HUGHES (Greetings and hallucinations!) Tue Dec 29 1987 17:08

    NASA announced this afternoon that the most recent SRB test was
    NOT successful.
    
    A two foot section of the nozzle delaminated during the firing and
    NASA does not consider the SRB ready for flight use.
    
    The have been several near burnthroughs of the SRB's nozzle in in
    various flights, including one that was considered to have been
    within seconds of catastrophic failure at BECO. Some of the SRB
    changes were supposed to correct the nozzle problems.
    
    Between this and the fire at the adjacent plant that builds MX first
    stage motors, I'd say Morton Thiokol is having a bad day.
    
    gary
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381.1VINO::DZIEDZICWed Dec 30 1987 08:129
    Noise I heard on various news programs yesterday and this morning
    imply a fairly significant push-back in the planned June 1988
    launch date of Discovery due to the SRB nozzle problem.  NASA is
    supposed to officially announce the impact sometime this week.
    
    As much as the news pains me, I had to think yesterday of the
    astronauts-in-waiting, some of which have been waiting YEARS
    for a planned flight; if it hurts us, think of how THEY feel.
    
381.2you can fix it now or you can fix it later...BOEHM::DENSMOREget to the verbsWed Dec 30 1987 08:125
    Gee, if they had only been making progressive design improvements
    over the past 6 years instead of doing it once.  But that costs
    money I guess.
    
    				:-(   Mike   :-(
381.3questionFRSBEE::STOLOSWed Dec 30 1987 12:152
    last news item i heard was that they weren't sure if it was a design
    fault or a defective part.  any news on this?
381.4VINO::DZIEDZICWed Dec 30 1987 13:017
    According to the KSC public affairs people, the fault was a
    portion of a retaining ring which holds the nozzle insulation
    in place had broken off.  This part was "improved" during the
    SRB redesign, although not "redesigned" itself.  Whether or
    not the part was defective won't be known until they perform
    some sophisiticated analysis on the metal of the ring.
    
381.5Progress is being madeECADSR::KINZELMANPaul KinzelmanWed Dec 30 1987 15:291
Hey, at least they didn't cover it up.
381.6phone numbers to get infoRDCV01::JCONNELLWed Dec 30 1987 19:434
    In case anyone wants to keep up on current events the NASA public
    affairs office broadcast news service recording number is
    (305)867-2525.if you want to talk to a human being the public affairs
    office number is (305)867-2468. 
381.7Outer Boot Retaining RingDECWIN::FISHERBurns Fisher 381-1466, ZKO3-4/W23Wed Dec 30 1987 22:1013
    The report I heard said that the failing part was an "outer boot
    retaining ring".  The explanation was that the boot is a flexible
    substance which covers the gimbal area of the nozzle much like the
    rubber boot at the bottom of most stick shifts.  The ring was what
    holds the boot at one end.  The claim is that some large fraction
    of the ring is missing, and some of it was found inside the motor
    (why was it not blown out?  Does this mean it only failed after
    BECO?)
    
    This is much different from what folks have said here about the nozzle
    delaminating etc.  Can anyone reconcile this?
    
    Burns
381.8all the news that fitsMONSTR::HUGHESGreetings and hallucinations!Thu Dec 31 1987 10:2117
    Again, this is from CNN as was the original item.
    
    They are saying that the piece that came away was part of an external
    protective cover on the SRB nozzle, not part of the nozzle lining
    delaminating as was originally implied.
    
    Apparently this test involved gimballing the nozzle to full deflection
    (not normally required in flight) which had not been done on previous
    tests.
    
    NASA are saying the delay may b as much as 3 months.
    
    I forget what I was watching, but some talking head last night said
    something about not wanting to launch too close to the elections
    (are they worried about ratings?)??
    
    gary
381.9VINO::DZIEDZICThu Dec 31 1987 11:1910
    The topic of delaying the launch until AFTER the 1988 elections
    has been mentioned numerous times in print.  The theory is that
    the "ruling party" doesn't want any bad publicity which another
    shuttle accident (or even extensive delays) might cause.  Last
    night on CNN Dick Truly kind of hem-hawed around the question,
    saying his goal was to launch when ready, but many political
    theorists suggest Reagan may delay the launch for political,
    and not technical, reasons.
    
    
381.10STAR::BANKSIn Search of MediocrityThu Dec 31 1987 13:594
    It's somewhat ironic that one of the hands on the stake driven through
    the heart of NASA is worried about looking bad afterward.
    
    (Still stewing over the latest round of NASA budget slashing)
381.11MONSTR::HUGHESGreetings and hallucinations!Tue Jan 05 1988 11:548
    CNN had something this morning about the test failure being caused
    by a nozzle design flaw and that the most optimistic launch date
    would be August (I didn't hear all of the details).
    
    The was also mention of a report that claims that the prevailing
    attitude at NASA is once again schedule first, safety second.
    
    gary
381.12How TASS told the StoryIMBACQ::BIROWed Jan 06 1988 11:3231
    I thougt it was interesting to see how TASS handled the news
    about the Discovery launching postponement.  The following is
    a HF radio reception of TASS, sorry for the errors but this 
    link is not the best
    
    
    
      .+DISCOVERY+ LAUNCHING POSTPONED.
   5/1 TASS 10 
   
   WASHINGTON JANUARY 5 TASS - THE LAUNCHING OF THE REUSABLE 
SPACESHIP +DISCOVERY+, PLANNED FOR JUNE, WN  WILL BE POSTPONED 
FOR 6-10 WEEKS. THIS WAS ANNOUNCED HERE ON MONDAY BY THE 
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (NASA). 
   SARA KEEGAN, A NASA REPRESENTATIVE,  HAS SAID IN WASHINTON  
MTYAT +DISCOVARY+ SPACESHIP WOULD MOST PROGATR BE LAUNCHED OR I MIBHF
&7 T. THE DELAY HAS BEEN CAUSED BY A FAILURE IN TESTING 
A MODERNIZED DESIGN OF THE SOLID PROPELLANT BOOSTER DM-9 LAST 
MONTH.  THE INSPECTION OF THE NEW DESIGN  OF THE BOOSTER NOZZL
NOVHING GASKET REVEALED THAT PART OF IT HAD BEEN TORN OFF. 
   THE NASA IS NOW CONSIDERING  A POSSIBILITY OF USING  ANOTHER 
MODERNIZED  EARLIER TESTED DM-8 BOOSTER MODEL9
   ITEM ENDS +++
   
    
                        
    I assume the section that was garbled said something like
    the launch had been postponed to the middle of August.
    
    john