Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from unix1.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Sun, 24 Mar 91 22:57:33 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sun, 24 Mar 91 22:57:24 -0500 (EST) Subject: SPACE Digest V13 #294 SPACE Digest Volume 13 : Issue 294 Today's Topics: O-Ring and Feynman NASA Headline News - 03/19/91 (Forwarded) Re: He3 on Moon? Re: Space Profits * SpaceNews 18-Mar-91 * Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription requests, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Date: 11 Mar 91 23:02:00 GMT From: agate!linus!philabs!ttidca!quad1!bohica!mcws!p0.f851.n102.z1.fidonet.org!Greg.Roberts@ucbvax.Berkeley.EDU (Greg Roberts) Subject: O-Ring and Feynman From: roberts@Iris1.ucis.dal.ca (Greg Roberts) Path: wciu!elroy.jpl.nasa.gov!sdd.hp.com!spool.mu.edu!news.nd.edu!news.cs.indiana.edu!nstn.ns.ca!Iris1.UCIS.Dal.Ca!roberts Newsgroups: sci.space Subject: O-Ring and Feynman Message-ID: <1991Mar11.150257.28368@nstn.ns.ca> Date: 11 Mar 91 15:02:57 GMT I recall seeing Dr. Feynman on television during the hearings, and doing that wonderfully simple experiment to show elasticity in O-Ring material at low temperature using his glass of ice water. The fact still remains, the cause of the shuttle failure is directly related to the failure of the O-Ring. If there had been no blow-by, no erosion, integrety of seal etc., there would have been no combustion of ET propellant. The failure of the support is a result of the wall failure at the lower attach point, which then caused rotation about the upper attach point, breaching the upper dome. You might also want to note that the force of the gasses through the ring was significant enough for the guidance computers to notice, mis-interpret as a gust load, and gimble the SRB nozzle, compounding the problem. I recall reading the torque loads at ignition due to 'twang' were well within limits, and not as severe as on previous missions. However, the gimballing limits on the SRB post launch were the most severe ever recorded. I have the most absoluterespect for Feynman. He took at the technical mumbo jumbo from the MT engineering staff, and made it crystal clear so that anyone, including Neil Armstrong, could understand it. Temperature. O-Ring. Failure. Greg Department of Mechanical Engineering, TUNS -- : Greg Roberts - via FidoNet node 1:102/851 (818)352-2993 : ARPA/INTERNET: Greg.Roberts@p0.f851.n102.z1.fidonet.org : UUCP: ...!{elroy!bohica,elroy!wciu,cit-vax!wciu}!mcws!851.0!Greg.Roberts : Compu$erve: >internet:Greg.Roberts@p0.f851.n102.z1.fidonet.org ------------------------------ Date: 19 Mar 91 17:24:57 GMT From: mips!zaphod.mps.ohio-state.edu!usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@apple.com (Ron Baalke) Subject: NASA Headline News - 03/19/91 (Forwarded) Headline News Internal Communications Branch (P-2) NASA Headquarters Tuesday, March 19, 1991 Audio Service: 202 / 755-1788 This is NASA Headline News for Tuesday, March 19, 1991 The first day of the two-day terminal countdown demonstration test is underway at the Kennedy Space Center. STS-37 crew activity today includes a payload and cargo briefing and review of the status of the vehicle this morning, and emergency egress training this afternoon. Tomorrow morning, the crew will enter the orbiter white room at launch pad 39-B at 8:15. The terminal countdown test concludes tomorrow at 11:00 am and the crew should be on their way back to Houston by 2:00 pm. The payload will undergo an end-to- end communications test on March 25. Final payload closeout activities will occur on April 1 and Atlantis' payload doors will be closed on April 2. Other ongoing activity at the launch center involves the continuation of cleanup activities to remove about 10 gallons of rain water which intruded into Atlantis' aft area. Kennedy technicians will carry out a comprehensive inspection of the aft area following the drying activities. The flight readiness review for the STS-37 Atlantis Gamma Ray Observatory mission is scheduled for next Tuesday and Wednesday, March 26 and 27. Refurbishment activity on Discovery to prepare that vehicle for its STS-39 Department of Defense mission also is progressing very well. Rockwell Downey plant technicians have returned Columbia's rebuilt fuel-line door-closing mechanisms to the Cape and they already have been installed into Discovery. Testing of the two mechanisms is expected to begin this afternoon. Installation of the main engines on Columbia has begun in the Orbiter Processing Facility. Later this afternoon, Columbia's STS-40 Spacelab Life Sciences-1 mission payload will be shown to members of the press. The payload, a Spacelab habitable module, is presently in the Operations and Checkout Building and will be transferred to the OPF for installation into Columbia Saturday, March 23. The SLS-1 mission is set for launch in May and will be a nine-day flight. * * * * * * * * * * * * * * * * The Galileo spacecraft will execute a trajectory correction maneuver tomorrow, March 20. This maneuver will help aim the spacecraft for the first-ever flyby of an asteroid next October. During the maneuver, Galileo will fire its small thrusters during a three-and- one-half-hour period beginning at 1:00 pm EST. The firings will change Galileo's velocity by about 5 miles per hour. This maneuver, along with three more planned in July and October, will shape Galileo's flight path for its flyby of Gaspra in the main asteroid belt on Oct. 29. Galileo is expected to approach within 1,000 miles of the irregularly-shaped, stony lump which measures nearly 15 miles across. Galileo will photograph and collect a wide variety of scientific data on Gaspra. The spacecraft has an opportunity for another asteroid encounter in 1993. * * * * * * * * * * * * * * * * The 22nd Lunar and Planetary Science Conference is underway at the Johnson Space Center all week. Tomorrow evening at 9:00 pm EST, in the JSC Teague Auditorium, the conference will present a special session on "Venus, Earth and Moon: New Views from Magellan and Galileo." This public special session will focus on discoveries made by the two spacecraft in the past year and will be hosted by Dr. Wesley Huntress, NASA director of solar system exploration. Here's the broadcast schedule for Public Affairs events on NASA Select TV. All times are Eastern. NASA Select TV is carried on GE Satcom F2R, transponder 13, C-Band, 72 degrees W Long., Audio 6.8, Frequency 3960 MHz. Tuesday, 3/19/91 9:00 am STS-40 Joint Integrated Simulation checkout between Johnson Space Center, Marshall Space Flight Center and Goddard Space Flight Center. 12:00 pm Starfinder program, "Evolution of a Star." 12:15 pm Aeronautics & Space Report #255. 12:30 pm Total Quality Management Colloquium featuring David Kearns, president of Xerox Corp. A repeat of a live broadcast originally shown on March 11. 6:00 pm NASA Programs will be replayed. Wednesday, 3/20/91 11:30 am STS-40 Joint Integrated Simulation between JSC, MSFC and GSFC. 1:15 pm Magellan-at-Venus status report live from the Jet Propulsion Laboratory. 1:30 pm Continuation of coverage of STS-40 Joint Integrated Simulation between JSC, MSFC and GSFC. Continues through 9:00 pm. ___ _____ ___ /_ /| /____/ \ /_ /| Ron Baalke | baalke@mars.jpl.nasa.gov | | | | __ \ /| | | | Jet Propulsion Lab | ___| | | | |__) |/ | | |___ M/S 301-355 | Change is constant. /___| | | | ___/ | |/__ /| Pasadena, CA 91109 | |_____|/ |_|/ |_____|/ | ------------------------------ Date: 19 Mar 91 04:30:02 GMT From: linac@pacific.mps.ohio-state.edu, unixhub!slacvm!doctorj@tut.cis.ohio-state.edu (Jon J Thaler) Subject: Re: He3 on Moon? In article <244.27E4AC18@mcws.fidonet.org>, Horowitz,.Irwin.Kenneth@p0.f851.n102.z1.fidonet.org (Horowitz, Irwin Kenneth) says: >It is left as an exercise for the reader to estimate the total mass of He3 >that would be on the lunar surface...:-). I'd like to do that exercise, but I don't know: 1: The flux of He3 in the solar wind, 2: The residence time for He3 in the lunar soil. Please supply us eager NetNews fans with these numbers. ------------------------------ Date: 15 Mar 91 18:11:22 GMT From: usc!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!pitt!nss!Paul.Blase@apple.com (Paul Blase) Subject: Re: Space Profits >>>* All customers would have to add refueling equipment to their >>> satellites >> >>Yes but I doubt it would be that hard when it is done in a standard >>way and everybody does it. NS> Hahahahahahaha!!!! (He he! :-) :-) :-) NS> Allen, we can't even agree on a _measuring system_ on this NS> planet. Rocket makers can't even agree on an _accounting NS> system_. Ad nauseum.... NS> How do you plan to enforce these added expenditures across NS> dozens of competing corporations and nations? I suppose that you've never heard of gasoline, Ethernet, VME bus, Airline traffic control procedures, the telephone system, fax machines, or the IBM PC? All of these are more-or-less international standards. Industry WILL adhere to standards if it clearly in their best, commercial, interest. Or haven't you noticed that you don't have to carry an adapter around whenever you fill up your automobile? >>This would also have the advantage of allowing >>satellites to be refueled thus making their operational lives much longer >>and reducing costs. NS> Operational life is based on quite a bit more than NS> stationkeeping fuel. This would involve further redesign NS> towards materials that last longer in space, greater lifetime NS> for circuitry, etc. etc. Most of the reconnasaince and communicaton satellites fail because they run out of stationkeeping fuel. As the various Pioneer and Voyager probes demonstrate, well designed electronics can last for quite a long time. --- via Silver Xpress V2.26 [NR] -- Paul Blase - via FidoNet node 1:129/104 UUCP: ...!pitt!nss!Paul.Blase INTERNET: Paul.Blase@nss.FIDONET.ORG ------------------------------ Date: 16 Mar 91 00:30:11 GMT From: ka2qhd!kd2bd@rutgers.edu (John Magliacane) Subject: * SpaceNews 18-Mar-91 * SB SPACE @ AMSAT < KD2BD $SPC0318 * SpaceNews 18-Mar-91 * Bulletin ID: $SPC0318 ========= SpaceNews ========= MONDAY MARCH 18, 1991 SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is published every week and is made available for unlimited distribution. * U2MIR NEWS * ============== Soviet Cosmonaut Musa Manarov, U2MIR, continues his amateur radio activity making voice and packet radio contacts with ham radio stations around the world from the orbiting Soviet space station "Mir". A recent listing of active messages on Musa's packet radio BBS made by VE1AIC on 09-Mar-91 produced the following listing: Msg # Stat Date Time To From @ BBS Subject 42 P 91/03/09 04:37 U2MIR KA1SU Hello Musa 41 PR 91/03/09 03:21 ALL U2MIR qsl 40 PR 91/03/09 03:02 U2MIR VO1SA Greetings 39 PR 91/03/09 03:00 U2MIR VO1XC GREETINGS 38 PR 91/03/09 02:54 U2MIR KI4TD GREETINGS 37 PR 91/03/09 02:51 U2MIR KC4UZA hello agai 36 PR 91/03/09 01:31 U2MIR F3NW TOMORROW 35 PR 91/03/08 20:37 U2MIR TR8CA * SpaceNews 04-Mar-91 * 34 PR 91/03/08 20:36 U2MIR TR8CA PHOTOS 33 P 91/03/08 16:30 KJ9U U2MIR LIST 02.03.91 2538 Bytes free Next message Number 43 It was quite a surprise to see "SpaceNews" available on Musa's message system! My sincere thanks to TR8CA in Gabon, Africa for uploading my report to the U2MIR-1 BBS and making it available for Musa to read. The message to KJ9U contained a listing of confirmed voice contacts with U2MIR over Hawaii on 02-Mar-91. The mail message received by KJ9U from U2MIR follows: Stat : PR Posted : 91/03/08 16:30 To : KJ9U From : U2MIR @ BBS : BID : Subject: LIST 02.03.91 WA6EMV,NH6XW,NH6VT,AH6HU,KH6QR AH6GR,K6WR,WH6CJO,KA6NEI,KJ9U KH6GDR,WY0H,NH6UY 73 MUSA Musa has also been noted logging into the KH6GPI packet radio BBS in Oahu, Hawaii. He recently posted an updated listing of Keplerian orbital data so ground stations can make accurate orbital predictions of Mir. * STS-37 NEWS * =============== Atlantis (OV 104) was rolled out to Kennedy Space Center launch pad 39-B on Friday morning in preparation for an early April mission carrying an "ham" crew. A Helium Signature test is scheduled for today and a Terminal Countdown Demonstration test is planned this week with a T-0 expected to occur on Wednesday. * TNX QSL! * ============ A special thanks to all those who sent QSLs to SpaceNews: KB5LET : Jay Godwin, Austin, Texas, USA N7BRJ/4 : Gary Memory, Bealeton, Virginia, USA ...and e-mail messages: KC4UZA, WB8SCE, KJ9U * FEEDBACK WELCOMED * ===================== Feedback regarding SpaceNews reports may be directed to the editor using any one of the following paths: INTERNET : kd2bd@ka2qhd.de.com PACKET : KD2BD @ NN2Z.NJ.USA.NA VOICE : 908/842-1900 ext 607 UUCP : ...rutgers!ka2qhd!kd2bd MAIL : John A. Magliacane, KD2BD Electronics Technology Department Advanced Technology Center Brookdale Community College 765 Newman Springs Road Lincroft, New Jersey, 07738 U.S.A. << * If you like what you see, send us your QSL card! * >> /EX -- John A. Magliacane FAX : (908) 747-7107 Electronics Technology Department AMPR : KD2BD @ NN2Z.NJ.USA.NA Brookdale Community College UUCP : ...!rutgers!ka2qhd!kd2bd Lincroft, NJ 07738 USA VOICE: (908) 842-1900 ext 607 ------------------------------ End of SPACE Digest V13 #294 *******************