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 ; Fri, 9 Mar 90 01:27:35 -0500 (EST) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Fri, 9 Mar 90 01:27:07 -0500 (EST) Subject: SPACE Digest V11 #126 SPACE Digest Volume 11 : Issue 126 Today's Topics: Americanisms (was: Ulysses Update - 03/06/90 {sic}) Re: Ejection seats (was Re: Challenger's Last...) Re: Fun Space Fact #1: Launcher Development Costs HST Wasps (was Re: hubble telescope power) Payload Status for 03/06/90 (Forwarded) Re: SR-71: LA to DC NASA SR-71's Re: Ejection seats (was Re: Challenger's Last...) Payload Summary for 03/06/90 (Forwarded) ---------------------------------------------------------------------- Date: 7 Mar 90 17:37:05 GMT From: mcsun!ukc!cam-cl!cet1@uunet.uu.net (C.E. Thompson) Subject: Americanisms (was: Ulysses Update - 03/06/90 {sic}) In article <2988@jato.Jpl.Nasa.Gov> baalke@mars.jpl.nasa.gov (Ron Baalke) writes: > > ... > > 10/05/90 - Launch from Space Shuttle > 12/30/90 - First Opposition > 08/24/91 - First Conjunction > 02/01/92 - Second Opposition > 03/11/92 - Jupiter Closest Approach > 09/07/92 - Second Conjuction > ... It can be quite confusing for us to read dates in your weird local format :-) I am not suggesting you should use *our* weird local format, though. How about using ISO format dates? (e.g. 1990-03-06, though the ISO standard does allow some other seperators than '-' to be used, I think) I suppose this comes in the same category as the complaints about miles and feet. Sorry to pick on this particular and interesting posting. Chris Thompson JANET: cet1@uk.ac.cam.phx Internet: cet1%phx.cam.ac.uk@nsfnet-relay.ac.uk ------------------------------ Date: 7 Mar 90 17:48:26 GMT From: swrinde!cs.utexas.edu!mailrus!jarvis.csri.toronto.edu!helios.physics.utoronto.ca!ists!yunexus!utzoo!henry@ucsd.edu (Henry Spencer) Subject: Re: Ejection seats (was Re: Challenger's Last...) In article jb7m+@andrew.cmu.edu (Jon C. R. Bennett) writes: >> ... Is it >> correct that such a system was once installed in a U.S. bomber but >> failed completely in the first *real* accident? ... > >I belive that the incedent in question refered to the second XB-70... >...The crew of the XB-70 had an ejection capsule (a cross between a >seat and a pod) which was designed to protect the crew in the event of a >ejection at high mach numbers. It was belived that the high g's >encountered durring the dive prevented the capsule from deploying... Not quite correct. The XB-70 had encapsulated ejection seats -- sort of individual escape capsules -- to give ejecting crew more protection at Mach 3. When the second XB-70 went out of control after a collision, one of the two pilots ejected successfully. The other didn't, and as I recall his seat was found, unfired, in the wreckage; why he didn't eject is not known. There has been at least one incident of an F-111 going violently out of control and the high acceleration or spin rate preventing successful use of its escape capsule; perhaps that's what you were thinking of. -- MSDOS, abbrev: Maybe SomeDay | Henry Spencer at U of Toronto Zoology an Operating System. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: 8 Mar 90 03:29:54 GMT From: mailrus!b-tech!kitenet!russ@tut.cis.ohio-state.edu (Russ Cage) Subject: Re: Fun Space Fact #1: Launcher Development Costs In a long-forgotten article, someone wrote: > But I don't think the 747's safety margins are much smaller than > those of a Cessna; if anything, it has to meet rather tougher > standards. So far as acceleration stresses go, the C-152 is designed and built to far more stringent standards than is a 747. The Aerobat variant of the C-152 is rated at +6/-3 G's; the C-152 is certified in both the utility and normal categories, and is rated for +4.6/ -2.3 G's. I believe transport category ratings are like +3.3 G's, quite a bit less stringent. Of course, a transport is far less likely to run into a wind-shear which can impose a 3.3-G jolt, unlike the lightly loaded wing of a C-152. The limits for both are quite adequate for normal purposes. -- I am paid to write all of RSI's opinions. Want me to write some for you? (313) 662-4147 Forewarned is half an octopus. Russ Cage, Robust Software Inc. russ@m-net.ann-arbor.mi.us ------------------------------ Date: 8 Mar 90 10:54:15 GMT From: mcsun!ukc!icdoc!syma!andy@uunet.uu.net (Andy Clews) Subject: HST Wasps (was Re: hubble telescope power) Current discussion about the HST prompts me to return to the vexed question: did they got rid of the wasps in the HST clean room? How was this achieved? Did they employ my grandad's suggestion of a jar of beer and jam strategically placed? Enquiring minds want to know! :-) -- Andy Clews, Computing Service, Univ. of Sussex, Brighton BN1 9QN, England JANET: andy@syma.sussex.ac.uk BITNET: andy%syma.sussex.ac.uk@uk.ac ------------------------------ Date: 6 Mar 90 20:09:00 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 03/06/90 (Forwarded) Daily Status/KSC Payload Management and Operations 03-06-90 - STS-31R HST (at VPF) - Yesterday VPF to MILA interface checks were performed along with HST closeout operations. Today HST battery charging and functional testing will be performed and MMSE preps for P/L transfer to the pad will continue. - STS-32R SYNCOM/LDEF (at SAEF-2) LDEF deintegration continues. - STS-35 ASTRO-1/BBXRT (at O&C) - Velcro patch installation and MLI closeout were worked yesterday and will continue today along with canister preps for P/L transfer to the opf. The CITE SIP panel was also removed yesterday. - STS-40 SLS-1 (at O&C) - The systems test was active Friday and will continue today. Experiment functional checks will also continue today. - STS-42 IML (at O&C) - Racks 4, 8, 9, and 11 staging operations were worked yesterday. Racks 3 and 8 staging operations are scheduled for today. - STS-45 Atlas-1 (at O&C) - Orthogrid hardpoint installations were worked yesterday and will continue today. Payload Status Report Tuesday, March 6, 1990 George H. Diller NASA/Kennedy Space Center HUBBLE SPACE TELESCOPE Power for the telescope is on today and tomorrow to meet periodic electrical requirements for the faint object camera and the wide field planetary camera. HST closeout operations continue. Last week the "cocoon" was removed to permit a final cleaning of the telescope. A new cocoon has now been placed over the spacecraft. This is designed as a protective sanitary liner which further assures cleanliness. Other work this week includes an electrical test of the solar array, configuration of the high gain antenna in preparation for installation into the payload canister, and removal of "red tag items" which are nonflight hardware. Upcoming schedule milestones include the installation of the spacecraft's nickel hydrogen batteries on Mar. 19, HST installation into the payload canister on Mar. 23, move to the launch pad on Mar. 26, and installation of the telescope into the payload bay of Discovery on Mar. 28. An Interface Verification Test with the Space Shuttle Discovery to verify connections is planned on Mar. 30. The payload bay doors are scheduled to be closed on April 10th. The launch of HST is scheduled at the beginning of a 2 1/2 hour window which opens at 9:21 a.m. EDT. The opening of the window is determined by sunlight available at the overseas abort sites and Edwards Air Force Base. The close is limited by the amount of time the astronauts are in their seats aboard Discovery. Enough light would be available at the contingency sites for a four hour "launch period." GAMMA RAY OBSERVATORY GRO was turned on Feb. 26 to begin Observatory Functional Testing. Data is collected by test equipment on site at the checkout facility for analysis by NASA and TRW spacecraft engineers. Tests completed include the Electrical Power Distribution System which checks onboard computers, tape recorders and data handling systems, and the spacecraft transmitters and receivers. Also completed is the propulsion system testing, and the testing of the thermal control system of heaters and thermostats. The four primary science instruments were turned on for the first time Mar. 2 and will be on much of this week. Also being tested this week is the Burst and Transient Source Experiment which senses bursts of transient Gamma Rays and then activates other science instruments. To follow is testing of the sensors used by the Attitude Control and Determination system of the spacecraft. ------------------------------ Date: 8 Mar 90 12:40:16 GMT From: zaphod.mps.ohio-state.edu!usc!orion.oac.uci.edu!dkrause@tut.cis.ohio-state.edu (Doug Krause) Subject: Re: SR-71: LA to DC In article braun@drivax.UUCP (Kral) writes: #Their flight path was such that they watched the sun rise and set 3 times #(this from an interview with the pilot). A truley awsome experience. How is this possible? The only thing I can think of is that they were constantly changing their altitude. Douglas Krause One yuppie can ruin your whole day. ---------------------------------------------------------------------- University of California, Irvine Internet: dkrause@orion.oac.uci.edu Welcome to Irvine, Yuppieland USA BITNET: DJKrause@ucivmsa ------------------------------ Date: 8 Mar 90 15:32:52 GMT From: cica!sol.ctr.columbia.edu!IDA.ORG!pbs!pstinson@iuvax.cs.indiana.edu Subject: NASA SR-71's RE: NASA SR-71'S It is my understanding NASA will be receiving three SR-71's for high altitude research. With the proper sensors installed and aided by inflight refueling, could one of these make a nonstop flight around the world, passing over the North and South Poles to study the holes in the ozone layer? This would be an aviation first. It would also tie in with NASA's Mission to Planet Earth. As another possible use for these Blackbirds, why not launch Pegasus from them at 80,000 feet plus instead of from a B-52 at only 40,000 feet? ------------------------------ Date: 7 Mar 90 16:49:53 GMT From: hplabsb!dsmith@hplabs.hp.com (David Smith) Subject: Re: Ejection seats (was Re: Challenger's Last...) >> Is it >> correct that such a system was once installed in a U.S. bomber but >> failed completely in the first *real* accident? > >I belive that the incedent in question refered to the second XB-70 ... >The crew of the XB-70 had an ejection capsule (a cross between a >seat and a pod) which was designed to protect the crew in the event of a >ejection at high mach numbers. It was belived that the high g's >encountered durring the dive prevented the capsule from deploying. The XB-70 had one pod per pilot. One got out, the other didn't. The one who did almost didn't, since the clamshell clamped down on his elbow near the pivot. He had to work hard to dislodge his elbow, whereupon the clamshell closed and successfully ejected. I suspect that the second pilot never got his elbow out. The F-111 has a crew escape capsule. The original B-1 prototypes had one. When a B-1 prototype crashed, the parachute suspension lines got fouled, tipping the cockpit so that it landed on a front corner, rather than on the bottom shock absorber, and one of the pilots died. -- David R. Smith, HP Labs dsmith@hplabs.hp.com (415) 857-7898 ------------------------------ Date: 6 Mar 90 20:10:06 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Summary for 03/06/90 (Forwarded) Payload Status Report Tuesday, March 6, 1990 George H. Diller NASA/Kennedy Space Center HUBBLE SPACE TELESCOPE Power for the telescope is on today and tomorrow to meet periodic electrical requirements for the faint object camera and the wide field planetary camera. HST closeout operations continue. Last week the "cocoon" was removed to permit a final cleaning of the telescope. A new cocoon has now been placed over the spacecraft. This is designed as a protective sanitary liner which further assures cleanliness. Other work this week includes an electrical test of the solar array, configuration of the high gain antenna in preparation for installation into the payload canister, and removal of "red tag items" which are nonflight hardware. Upcoming schedule milestones include the installation of the spacecraft's nickel hydrogen batteries on Mar. 19, HST installation into the payload canister on Mar. 23, move to the launch pad on Mar. 26, and installation of the telescope into the payload bay of Discovery on Mar. 28. An Interface Verification Test with the Space Shuttle Discovery to verify connections is planned on Mar. 30. The payload bay doors are scheduled to be closed on April 10th. The launch of HST is scheduled at the beginning of a 2 1/2 hour window which opens at 9:21 a.m. EDT. The opening of the window is determined by sunlight available at the overseas abort sites and Edwards Air Force Base. The close is limited by the amount of time the astronauts are in their seats aboard Discovery. Enough light would be available at the contingency sites for a four hour "launch period." GAMMA RAY OBSERVATORY GRO was turned on Feb. 26 to begin Observatory Functional Testing. Data is collected by test equipment on site at the checkout facility for analysis by NASA and TRW spacecraft engineers. Tests completed include the Electrical Power Distribution System which checks onboard computers, tape recorders and data handling systems, and the spacecraft transmitters and receivers. Also completed is the propulsion system testing, and the testing of the thermal control system of heaters and thermostats. The four primary science instruments were turned on for the first time Mar. 2 and will be on much of this week. Also being tested this week is the Burst and Transient Source Experiment which senses bursts of transient Gamma Rays and then activates other science instruments. To follow is testing of the sensors used by the Attitude Control and Determination system of the spacecraft. ------------------------------ End of SPACE Digest V11 #126 *******************