Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from beak.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 ; Sat, 28 Apr 90 03:05:42 -0400 (EDT) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sat, 28 Apr 90 03:04:58 -0400 (EDT) Subject: SPACE Digest V11 #328 SPACE Digest Volume 11 : Issue 328 Today's Topics: Re: Giant crawler transporter to pass 1000 miles on STS-35 rollout (Forwarded) Re: Dirigible launchers (was Re: Pegasus launchers, space-going DUCT TAPE) Re: Not-so-Silent Running (Was Re: a bunch of other irrelvant things) IMPORTANT ROUTE INFO -- Shuttle Landing NASA Headline News for 04/26/90 (Forwarded) Re: Pegasus launch from Valkyrie (or ... Re: Space Station Distribution Frequency Re: Dyson spheres, heat flow Payload Status for 04/25/90 (Forwarded) ---------------------------------------------------------------------- Date: 27 Apr 90 16:05:38 GMT From: att!cbnewsh!lmg@ucbvax.Berkeley.EDU (lawrence.m.geary) Subject: Re: Giant crawler transporter to pass 1000 miles on STS-35 rollout (Forwarded) In article <47818@ames.arc.nasa.gov> yee@trident.arc.nasa.gov (Peter E. Yee) writes: > Each transporter weighs six million pounds. The flat, load- > toting tops are 131 feet long and 114 wide, about the size of a > baseball diamond. The height of the top is adjustable by ^^^^^^^^^^^^^^^^ ... > transporter's leveling system does not allow the tip of the Space > Shuttle's external tank to vary more from the vertical than the > diameter of a basketball. ^^^^^^^^^^ Please use appropriate units. The standard American units of measure are the football field and the pack of cigarettes. -- --Larry: 74017.3065@compuserve.com ------------------------------ Date: 27 Apr 90 15:59:20 GMT From: usc!cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@ucsd.edu (Henry Spencer) Subject: Re: Dirigible launchers (was Re: Pegasus launchers, space-going DUCT TAPE) In article <33838@sequent.UUCP> cliffw@crg1.UUCP (Cliff White) writes: >why reject the B-1? >It's fast, new, designed for dropping things... >and has no useful current mission that i've heard about... The B-1 is not particularly fast, actually. With occasional exceptions, military aircraft have been getting slower over the past 20-30 years, as people came to realize that high supersonic speeds are of very little use for most military missions. That's why the 30-year-old XB-70 #2 would still be the aircraft of choice, if only it still existed -- it was just about the last hurrah of the higher-and-faster movement. -- If OSI is the answer, what is | Henry Spencer at U of Toronto Zoology the question?? -Rolf Nordhagen| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: 27 Apr 90 02:35:18 GMT From: ox.com!itivax!vax3.iti.org!aws@CS.YALE.EDU (Allen W. Sherzer) Subject: Re: Not-so-Silent Running (Was Re: a bunch of other irrelvant things) In article <1990Apr27.002451.29878@agate.berkeley.edu> daveray@sag4.ssl.berkeley.edu (David Ray) writes: >In the movie they implied that they were exploding the bombs when they >were far enough away not to ba a danger. What I don't understand is why blow them up at all? Why not just drop them where they are and abandon them? >The movie sucked. No arguement here. >It didn't make sense that a NASA-like space federation >would have gone to all the expense and planning to build these space >greenhouses, maintain them, have them work perfectly, and then decide >to nuke then for beaurocratic reasons. Do the words "Saturn V" ring a bell? Allen ----------------------------------------------------------------------------- | Allen W. Sherzer | Real men write self modifying code. | | aws@iti.org | | ----------------------------------------------------------------------------- ------------------------------ Date: 26 Apr 90 19:23:48 GMT From: skipper!shafer@ames.arc.nasa.gov (Mary Shafer) Subject: IMPORTANT ROUTE INFO -- Shuttle Landing Edwards AFB is undergoing some major road construction. To avoid it, and the attendant traffic jam, here's the current best route. Take Highway 14 to Mojave and go EAST on Hwy 58. If you're going to the Hillside Viewing Area or to Dryden, exit on Rosamond Blvd. to the right. If you're going to the Public Viewing Site, exit on 20 Mule Team Rd. to the right. This route is normally about 25-30 minutes longer, but with the construction, it may well be shorter. But give yourself a little longer. -- Mary Shafer shafer@skipper.dfrf.nasa.gov ames!skipper.dfrf.nasa.gov!shafer NASA Ames Dryden Flight Research Facility, Edwards, CA Of course I don't speak for NASA ------------------------------ Date: 27 Apr 90 20:40:26 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: NASA Headline News for 04/26/90 (Forwarded) ----------------------------------------------------------------- Thursday, April 26, 1990 Audio Service: 202/755-1788 ----------------------------------------------------------------- This is NASA Headline News for Thursday, April 26... Visual support from the STS-31 crew provided the extra caution required when a software problem was overcome to successfully deploy the Hubble Space Telescope yesterday. At 330 nautical miles, located just West of Ecuador above the Earth, the space shuttle Discovery released the telescope. This is the highest altitude ever achieved by a space shuttle. Overnight, the Discovery initiated two burns separating the distance between the orbiter and the HST. By crew wake-up this morning at 3:35 A.M. EDT, it was trailing at a safe 42 nautical miles -- preparing for the next major milestone. Operations continue to complete the steps required to open the aperature door at noon on Friday, April 27. Early this morning, these steps included successful check out of the high antennae, loading the onboard computer with stored commands and pointing the high gain antennae to the TDRS satellite. Meanwhile, at Kennedy Space Center, the Terminal Countdown Demonstration Test for STS-35 launch of the Columbia and the Astro-1 payload is also set for Friday. The mock countdown begins at 8:00 A.M. at the T minus 24 hour mark and concludes with a simulated engine cutoff on Saturday morning, April 28. The Columbia is now at Pad 39A scheduled for liftoff mid-May. ******** The first Japanese astronaut to crew a United States space shuttle will participate in the June 1991 mission. Mamoru Mohri was chosen from over 500 candidates in 1985. The National Space Development Agency says Mohri is a 42 year-old assistant professor of nuclear engineering. He will travel to the U.S on Sunday, April 29, for a year of NASA training. ******** The European Space Agency announced signing an agreement yesterday in Paris with the government of the Soviet Union. The cooperation will be in the field of "exploration and use of space for peaceful purposes." Space activities will include exploration of the solar system, space astronomy and astrophysics as well as earth observation. Working groups on these disciplines will serve to recommend joint projects over a ten year period. ******** Aerospace Daily reports Japan's Institute of Space and Astronautical Science cannot confirm its lunar probe Hagoromo went into orbit around the moon. Although there is record the ignition of the four kilogram solid rocket motor kicked in about 20,000 kilometers away from the moon, it appears the scientific spacecraft tracking transmitter failed early in the mission. ******** ----------------------------------------------------------------- Television coverage on NASA Select TV of the STS-31 mission will continue through landing scheduled Sunday, April 29. Discovery's arrival will be covered from 10:00 A.M. to 12:00 Midnight EDT. Today.... 12:30 P.M. STS-31 Change of shift news conference. Johnson Space Center. 2:09 P.M. Downlink for crew choice TV opportunity during Orbit 34. 4:30 P.M. STS-31 Change of shift news conference. Goddard Space Flight Center. 7:00 P.M. Replay of Flight Day 3 highlights. Friday, April 27....... 9:30 A.M. STS-31 Change of shift news conference. Goddard Space Flight Center. 11:30 A.M. STS-31 Change of shift news conference. Johnson Space Center 12:29 P.M. Crew Choice TV Opportunity (Orbit 48) 1:49 P.M. Middeck Activities (Orbit 49) Houston TV 4:30 P.M. STS-31 Change of shift news conference. Goddard Space Flight Center. 7:00 P.M. STS-31 Change of shift news conference. Johnson Space Center. 8:00 P.M. Replay of STS-31 Flight Day 4 All events and times are subject to change without notice. ----------------------------------------------------------------- These reports are filed daily, Monday through Friday, at 12:00 Noon, EDT. And, additional reports are provided during mission operations. ----------------------------------------------------------------- A service of the Internal Communications Branch, NASA Headquarters. ------------------------------ Date: 27 Apr 90 19:37:02 GMT From: mcdchg!illusion!marcus@rutgers.edu (Marcus Hall) Subject: Re: Pegasus launch from Valkyrie (or ... Fraering Philip: ]Remember: The cost of developing Pegasus from point zero: $40 million. ]Cost of refurbishing B-70 Valkyrie: probrably lots more. Vincent Cate: >.... Remember, and increase of 300 lbs worth of payload >at $10,000/lb is worth $3,000,000. There are no planes that cost that >much per flight. Actually, I've heard that the XB-70 cost about $10,000,000 per flight. This was counting all the development costs, but still, it was quite expensive. I don't know what the actual operational costs were, presumably they were something close to reasonable since it was intended to be an operational plane. >I did not really mean to suggest that we use the Valkyrie. I just knew >that 25 years ago we had a fast big plane and wondered if we had one >today. I see that we do not. Oh well. Yea, 25 years ago we had alot of things (Saturn production, etc.) Rather depressing to see what's become of it all.. marcus hall ------------------------------ Date: 27 Apr 90 22:53:41 GMT From: crdgw1!sixhub!davidsen@uunet.uu.net (Wm E. Davidsen Jr) Subject: Re: Space Station Distribution Frequency In article <1990Apr27.034946.4407@laguna.ccsf.caltech.edu> palmer@gap.caltech.edu (David Palmer) writes: | The Power bus is regulated. The DC voltage is well below the output voltage | from the solar panels. Loss in the regulation system is estimated at 20%. | According to the power subcommittee, giving power-hungry instruments | and devices unregulated power (to save the 20%) is 'not an option'. Her's a though. Assuming that (a) the load will be relitively static (changing in seconds rather than milliseconds) and that there will be batteries to charge at least part of the time, could the batteries be put in series with the load (in a series parallel arrangement) to charge the batteries and make use of some of the power which would otherwise be dissapated in regulation? And how is excess power (heat) going to be dumped? -- bill davidsen - davidsen@sixhub.uucp (uunet!crdgw1!sixhub!davidsen) sysop *IX BBS and Public Access UNIX moderator of comp.binaries.ibm.pc and 80386 mailing list "Stupidity, like virtue, is its own reward" -me ------------------------------ Date: 27 Apr 90 04:02:56 GMT From: munnari.oz.au!uluru3!danielce@uunet.uu.net (Daniel Ake CAROSONE) Subject: Re: Dyson spheres, heat flow In article <1990Apr25.045641.13992@uokmax.uucp>, spcoltri@uokmax.uucp (Steven P Coltrin) writes: > In article <9004242137.AA02290@cmr.ncsl.nist.gov> roberts@CMR.NCSL.NIST.GOV (John Roberts) writes: > >Additional question: in "Ringworld", Larry Niven describes a cooling system > >for use in a spaceship near a star - since cooling by radiation is impractical, > >the waste heat is pumped to a collection point within the ship, from which it > >will be dispensed when the ship is no longer near a star. Could this work, and > >if so to what extent? I could make a guess, but that's all it would be. > > That would depend on how good your heat sink and pump (and insulation) were... > and how much risks you want to take. > A better system occurred to me awhile ago; presuming the _Lying Bastard_ was > fusion-powered (I don't remember if it was ever stated, even), then the power > plant is going to be producing helium exhaust. Just pump your waste heat into > it and jettison. Comments? From what I remember of the series (been a while) most of the ships ran on inertialess drives imported from th puppeteers. What use an inertialess drive would have of helium exhaust? (other than as a heat sink for its own sake!) Another thought. Someone said that you could use a balck hole as a heat sink within a Dyson sphere. Tell that to Hawking, who said that even black holes produce balckbody radiation. It would work, but you would have to get the hole out through the sphere after a while (long while) or you would still radiate. ------------------------------ Date: 27 Apr 90 18:33:49 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 04/25/90 (Forwarded) Daily Status/KSC Payload Management and Operations 04-25-90. - STS-31R HST (at Pad-B) - Support for launch countdown was provided on Tuesday. No activities are scheduled for today. - STS-35 ASTRO-1 (at OPF) - ASTRO-1/BBXRT landline validation will be performed today. - STS-40 SLS-1 (at O&C) - Experiment train interface testing continues. - STS-42 IML-1 (at O&C) - Module pyrell foam replacement, floor staging, and rack staging were worked Tuesday and will continue today. - STS-45 (Atlas-1)- Bracket installations and cable inspections will continue today. - STS-46 TSS-1 (at O&C) - EMP deintegration continues. - STS-55 SL-D2 (at O&C) - Rack 12 staging will continue today. - HST M&R (at O&C) - ORUC interface testing was active Tuesday. No activities are scheduled for today. ------------------------------ End of SPACE Digest V11 #328 *******************