[FPSPACE] LVs with Asymmetric Thrust
David M Harland
dave.harland at ntlworld.com
Fri Apr 21 12:50:07 EDT 2006
At 10:38 am -0600 21/4/06, Jennings, Pete D wrote:
> >At 6:07 pm -0400 20/4/06, Chris Jones wrote:
>>>Today's Atlas V launch from the Cape is proceeding successfully, now
>in its
>>>cruise phase between the first and second firing of the Centaur upper
>stage.
>>>
>>>This was the first flight of the single SRM variant of the launcher.
>This
>>>strikes me as an unusual variant, as its the only combination of
>identical
>>>strap-ons that cannot be arranged symmetrically.
>>
>>The Atlas V that launched MRO had three on one side and two on the
>other.
>>
>>
>>dmh
>
>You are confusing the Pluto New Horizons launch this past January with
>the Mars Reconaissance Orbiter launch last August.
Yes indeed, I realised that soon after posting.
>PNH flew the Atlas V
>551 configuration with the maximum 5 solid rocket boosters. The MRO
>launch did not need any SRBs to make the Mars transfer orbit injection.
>Interesingly, the PNH crossed the orbit of Mars less than a month after
>the MRO Mars orbit insertion, despite MRO having had a 5-month head
>start. Compare the launch videos of the two missions on the ILS web
>site. The Atlas V 401 takes something like 11 seconds just to clear the
>tower, but the 551 leaps away faster than anything I've seen but an
>SS-19.
>
>Atlas V has now launched three missions using significantly asymmetric
>thrust: INMARSAT 4 F1 with an Atlas V 431 (3 SRBs); Pluto with an Atlas
>V 551 (5 SRBs), and now the Astra 1KR mission with an Atlas V 411 (1
>SRB). There were also two launches of the Atlas V 521 configuration
>with 2 SRBs each in an only slightly asymmetric configuration --
>probably about like the Delta II with 4 SRBs alluded to earlier on this
>list.
>
>Note that the Energiya Buran differs from the US Shuttle in that the
>orbiter does not mount any main engines. They are attached to the base
>of the Energiya external tank instead. So Energiya Buran had a
>symmetric thrust configuration, but a significantly asymmetric payload
>configuration.
>
>In the H2A "Brief Description" I have found a planned configuration with
>a single large liquid rocket booster attached to the side of the H2A.
>That would trump the Atlas configurations for asymmetric thrust, but of
>course the US Shuttle is the least symmetric of all -- and probably the
>all time winner in that department.
>
>---Pete D. Jennings
> Deputy Chief Engineer
> International Launch Services
> (571) 633-7519
>
>This electronic message transmission contains information which may be
>confidential or proprietary information belonging to International
>Launch Services, Lockheed Martin, Lockheed Khrunichev Energia
>International and/or Lockheed Martin Commercial Launch Services. If you
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>
>-----Original Message-----
>From: fpspace-bounces at friends-partners.org
>[mailto:fpspace-bounces at friends-partners.org]On Behalf Of
>fpspace-request at friends-partners.org
>Sent: Friday, April 21, 2006 12:00 PM
>To: fpspace at friends-partners.org
>Subject: FPSPACE Digest, Vol 26, Issue 21
>
>
>Send FPSPACE mailing list submissions to
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>
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>When replying, please edit your Subject line so it is more specific
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>
>
>Today's Topics:
>
> 1. Re: FW: MetOp satellite (Javier Casado)
> 2. Re: FW: MetOp satellite (Bob Christy)
> 3. Re: FW: MetOp satellite (David Anderman)
> 4. Re: FW: MetOp satellite (David Anderman)
> 5. Send something into space, for $99 (video available) (LARRY KLAES)
> 6. Re: Scott Crossfield Missing (Chris Jones)
> 7. Re: FW: MetOp satellite (Sven Grahn)
> 8. Antimatter's Advantage - and the catch (LARRY KLAES)
> 9. Chinese lunar timetable described (in part) (pjp)
> 10. FW: NASA'S SPACE TECHNOLOGY 5 (ST5) STATUS REPORT (LARRY KLAES)
> 11. Scott Crossfield, RIP (mattwriter at aol.com)
> 12. Eanna Flanagan hunts down gravity waves -- ripples in
> 'spacetime' -- in quest to (LARRY KLAES)
> 13. Atlas V launch (so far) successful (and trivia question)
> (Chris Jones)
> 14. Re: Atlas V launch (so far) successful (and trivia question)
> (Marc D. Rayman)
> 15. Re: Atlas V launch (so far) successful (and trivia question)
> (David M Harland)
> 16. Operation To Correct ISS Orbit Fails (LARRY KLAES)
> 17. Re: Operation To Correct ISS Orbit Fails (Mgr. CSc. Anton?n V?tek)
> 18. Re: mistake (Mgr. CSc. Anton?n V?tek)
> 19. Re: Operation To Correct ISS Orbit Fails (David Anderman)
> 20. Deep Impact Team Want To Go Back With A Bang (LARRY KLAES)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Thu, 20 Apr 2006 18:20:06 +0200 (CEST)
>From: Javier Casado <fjcasadop at yahoo.es>
>Subject: Re: [FPSPACE] FW: MetOp satellite
>To: Javier Casado <fjcasadop at yahoo.es>, Jim Oberg
> <joberg at houston.rr.com>, fpspace at friends-partners.org
>Message-ID: <20060420162006.96084.qmail at web25705.mail.ukl.yahoo.com>
>Content-Type: text/plain; charset=iso-8859-1
>
>Sorry, I wanted to say "that counterbalance..."
>
>Javier Casado <fjcasadop at yahoo.es> escribi?: Anyway, it is still
>strange to me to use Baikonur for these orbits having the option of
>Plesetsk. I'm sure there will be important factors that counterweight
>latitude for this and other missions, but I wonder which they are.
>
>Jim Oberg <joberg at houston.rr.com> escribi?: Actually, Baikonur has
>already been the site of sun-synchronous launches,
>but the the southwest over the Persian Gulf. This is the first launch to
>the
>north, instead. It's not clear why the southwest azimuth was not usable,
>perhaps clearance for impact zones in those countries got too expensive.
>
>
>
>
>
>----- Original Message -----
>From: "Javier Casado"
>To:
>Sent: Thursday, April 20, 2006 9:30 AM
>Subject: Re: [FPSPACE] FW: MetOp satellite
>
>
>Well, it doesn't seem strange if you think that this satellite is to be
>inserted in polar orbit, what requires a westward launch (north-west or
>south-west; they have chosen north-west). However, a better place for
>this
>type of launch would be Plesetsk.
>
>
>
>---------------------------------
>
>LLama Gratis a cualquier PC del Mundo.
>Llamadas a fijos y m?viles desde 1 c?ntimo por minuto.
>http://es.voice.yahoo.com
>
>
>---------------------------------
>
>LLama Gratis a cualquier PC del Mundo.
>Llamadas a fijos y m?viles desde 1 c?ntimo por minuto.
>http://es.voice.yahoo.com
>
>------------------------------
>
>Message: 2
>Date: Thu, 20 Apr 2006 17:20:29 -0000
>From: "Bob Christy" <rdc at zarya.info>
>Subject: Re: [FPSPACE] FW: MetOp satellite
>To: <fpspace at friends-partners.org>
>Message-ID: <000901c6649e$b9f995f0$0202a8c0 at Progress>
>Content-Type: text/plain; charset="us-ascii"
>
>The south-easterly trajectory used for previous sun-synchronous launches
>out
>of Baikonur takes the vehicle over Afghanistan. In the "old" days that
>was
>the first country to be encountered outside the borders of the USSR.
>Nowadays Uzbekistan is the first landfall and would probably be the
>"recipient" of of first or second stage debris as well as the
>consequences
>of an early shut-down of a launcher.
>
>Co-incidentally, as I recall, Afghanistan had just been invaded by the
>USSR
>when the first Soviet sun-synchronous satellite was launched. Uzbekistan
>was
>part of the Soviet Union, so all was well.
>
>With the recent changes of politics - independence for Uzbekistan,
>Afghanistan now being in the USA's sphere of influence, a south-east
>launch
>is probably no longer a viable option. The north-westerly path out od
>Baikonur keeps the ascent trajectory over Russia.
>
>Regarding a launch out of Plesetsk - I'm not sure that a Russian rocket
>being lobbed over the north pole in the general direction of America
>would
>be any more of a good idea nowadays than it was in the 1980s and 1990s,
>even
>though a relative "thaw" in superpower relations has taken place.
>
>Bob Christy
>
>
>
>> -----Original Message-----
>> From: fpspace-bounces at friends-partners.org
>> [mailto:fpspace-bounces at friends-partners.org] On Behalf Of Jim Oberg
>> Sent: 20 April 2006 14:54
>> To: Javier Casado; fpspace at friends-partners.org
>> Subject: Re: [FPSPACE] FW: MetOp satellite
>>
>> Actually, Baikonur has already been the site of
>> sun-synchronous launches, but the the southwest over the
>> Persian Gulf. This is the first launch to the north, instead.
>> It's not clear why the southwest azimuth was not usable,
>> perhaps clearance for impact zones in those countries got too
>> expensive.
>>
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "Javier Casado" <fjcasadop at yahoo.es>
>> To: <fpspace at friends-partners.org>
>> Sent: Thursday, April 20, 2006 9:30 AM
>> Subject: Re: [FPSPACE] FW: MetOp satellite
>>
>>
>> Well, it doesn't seem strange if you think that this
>> satellite is to be
>> inserted in polar orbit, what requires a westward launch
>> (north-west or
>> south-west; they have chosen north-west). However, a better
>> place for this
>> type of launch would be Plesetsk.
>>
>> _______________________________________________
>> FPSPACE mailing list
>> FPSPACE at friends-partners.org
>> http://www.friends-partners.org/mailman/listinfo/fpspace
>>
>>
>
>
>
>------------------------------
>
>Message: 3
>Date: Thu, 20 Apr 2006 10:31:33 -0700
>From: David Anderman <davida at cwo.com>
>Subject: Re: [FPSPACE] FW: MetOp satellite
>To: <fpspace at friends-partners.org>
>Message-ID: <7.0.1.0.2.20060420102650.040543b8 at cwo.com>
>Content-Type: text/plain; charset="us-ascii"
>
>
>
>------------------------------
>
>Message: 4
>Date: Thu, 20 Apr 2006 10:31:53 -0700
>From: David Anderman <davida at cwo.com>
>Subject: Re: [FPSPACE] FW: MetOp satellite
>To: <fpspace at friends-partners.org>
>Message-ID: <7.0.1.0.2.20060420103151.00adc6e8 at cwo.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>Actually, Dneprs just started southerly launches in 2004:
>
>http://www.space.com/businesstechnology/business/dnepr_preview_000307.ht
>ml
>
>"The Dnepr southern launches would mean that rocket's first stage of
>the booster would fall in Turkmenistan, a former Soviet republic. "
>
>A Tsiklon launch from Baikonur would have a first stage drop zone
>similar to that of Dnepr. Soyuz-Fregat would have different
>requirements, though.
>
>DWA
>
>
>At 10:20 AM 4/20/2006, Bob Christy wrote:
>>With the recent changes of politics - independence for Uzbekistan,
>>Afghanistan now being in the USA's sphere of influence, a south-east
>launch
>>is probably no longer a viable option. The north-westerly path out od
>>Baikonur keeps the ascent trajectory over Russia.
>
>
>
>------------------------------
>
>Message: 5
>Date: Thu, 20 Apr 2006 14:47:06 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] Send something into space, for $99 (video
> available)
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F366C40D6EA88A9FF9014029CBA0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>Send something into space, for $99 (video available)
>
>A Californian company is offering to send an object of your choice
>into space as early as 2008, and at "bake sale" prices, as long as
>it fits in a soda can.
>
>http://www.newscientistspace.com/article/dn9023?DCMP=NLC-nletter&nsref=d
>n9023
>
>
>
>
>------------------------------
>
>Message: 6
>Date: Thu, 20 Apr 2006 14:51:37 -0400
>From: Chris Jones <clj at panix.com>
>Subject: Re: [FPSPACE] Scott Crossfield Missing
>To: fpspace at friends-partners.org
>Message-ID: <200604201451.38228.clj at panix.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>On Thursday 20 April 2006 11:32, Porter, William R wrote:
>> http://www.cnn.com/2006/US/04/20/georgia.plane/index.html
>>
>> This was sent to me from a friend of my who is a radio reporter.
>
>Apparently they've found the wreckage of his airplane with his body:
>http://www.chron.com/disp/story.mpl/ap/nation/3807695.html
>
>
>------------------------------
>
>Message: 7
>Date: Thu, 20 Apr 2006 21:15:53 +0200
>From: Sven Grahn <svengrahn at telia.com>
>Subject: Re: [FPSPACE] FW: MetOp satellite
>To: "Bob Christy" <rdc at zarya.info>, <fpspace at friends-partners.org>
>Message-ID: <5.2.1.1.2.20060420211542.03384710 at m1.875.telia.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>At 17:20 2006-04-20 +0000, Bob Christy wrote:
>>The south-easterly trajectory used for previous sun-synchronous
>launches out
>>of Baikonur takes the vehicle over Afghanistan. In the "old" days that
>was
>>the first country to be encountered outside the borders of the USSR.
>>Nowadays Uzbekistan is the first landfall and would probably be the
>>"recipient" of of first or second stage debris as well as the
>consequences
>>of an early shut-down of a launcher.
>>
>>Co-incidentally, as I recall, Afghanistan had just been invaded by the
>USSR
>>when the first Soviet sun-synchronous satellite was launched.
>Uzbekistan was
>>part of the Soviet Union, so all was well.
>>
>>With the recent changes of politics - independence for Uzbekistan,
>>Afghanistan now being in the USA's sphere of influence, a south-east
>launch
>>is probably no longer a viable option. The north-westerly path out od
>>Baikonur keeps the ascent trajectory over Russia.
>>
>>Regarding a launch out of Plesetsk - I'm not sure that a Russian rocket
>>being lobbed over the north pole in the general direction of America
>would
>>be any more of a good idea nowadays than it was in the 1980s and 1990s,
>even
>>though a relative "thaw" in superpower relations has taken place.
>>
>>Bob Christy
>It has been done with the Kosmos-3M, but then this is a two-stage
>vehicle
>with no stage impacting anywhere near continental US. But, the
>Instantaneous Impact Point (IIP) trace passes quite near to L.A.!
>
>Sven
>
>
>
>
>------------------------------
>
>Message: 8
>Date: Thu, 20 Apr 2006 15:22:46 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] Antimatter's Advantage - and the catch
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F40517BD513F87476866E19CBA0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>To quote:
>
>One of the beauties of antimatter is its efficiency. A fission reaction
>uses
>up about 1 percent of the available energy inside matter, whereas the
>annihilation of antimatter and matter converts 100 percent of the mass
>into
>energy. No wonder tiny amounts of antimatter can have such powerful
>effects.
>Put a gram of matter together with a gram of antimatter and you release
>the
>equivalent of a 20 kiloton bomb, about the size of the one that
>destroyed
>Hiroshima.
>
>And if you really want to see antimatter?s potential, consider what it
>does
>to mass ratios, which compare the weight of a fully fueled spacecraft
>with
>that of an empty one. In his book Mirror Matter: Pioneering Antimatter
>Physics (New York: John Wiley & Sons, 1988), Robert Forward spoke of
>antimatter-driven spacecraft with mass ratios of 5 to 1 (by contrast,
>the
>Apollo missions operated with a ratio of 600 to 1). Indeed, Forward
>believed
>that a 1-ton probe to Alpha Centauri would require roughly four tons of
>liquid hydrogen and forty pounds of antimatter.
>
>All of which takes us back to Gerald Smith?s intriguing work with
>positrons.
>I first ran into Smith?s ideas when he collaborated with Steven Howe,
>Raymond Lewis, and Kirby Meyer on a project called AIMStar (Antimatter
>Initiated Microfusion Starship). Here?s a link, but beware: it?s a PDF
>file.
>With a mission goal of reaching 10,000 AU ? the domain of the Oort
>Cloud?s
>comets ? in fifty years, AIMStar would use antimatter to ignite a fusion
>
>reaction. Building on an earlier design that used antiprotons to trigger
>
>fission, AIMStar would tap tens of micrograms of antimatter to create
>the
>reaction, injecting deuterium and helium-3 into a cloud of antiprotons.
>
>Full article here:
>
>http://www.centauri-dreams.org/?p=629
>
>
>
>
>------------------------------
>
>Message: 9
>Date: Thu, 20 Apr 2006 15:44:19 -0400
>From: "pjp" <pjp961 at svol.net>
>Subject: [FPSPACE] Chinese lunar timetable described (in part)
>To: <fpspace at friends-partners.org>
>Message-ID: <000801c664b2$e6330f20$4031fea9 at pesavento1>
>Content-Type: text/plain; charset="iso-8859-1"
>
>http://www.space.com/news/060420_china_visit.html
>
>Lunakhod-type moon buggy by 2012;
>
>Lunar soil sample return by 2017.
>
>------------------------------
>
>Message: 10
>Date: Thu, 20 Apr 2006 16:07:43 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] FW: NASA'S SPACE TECHNOLOGY 5 (ST5) STATUS REPORT
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F24511F2612D27A6D9975D99CBA0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>
>
>
>>From: Edward S Campion <escampion at msx.gsfc.nasa.gov>
>>Reply-To: Edward S Campion <escampion at msx.gsfc.nasa.gov>
>>To: gsfc_press_releases at listserv.gsfc.nasa.gov
>>Subject: NASA'S SPACE TECHNOLOGY 5 (ST5) STATUS REPORT
>>Date: Thu, 20 Apr 2006 15:46:52 -0400
>>
>>
>>
>>Grey Hautaluoma April 20, 2006
>>Headquarters, Washington, D.C.
>>(202) 358-0668
>>
>>Lynn Chandler
>>Goddard Space Flight Center, Greenbelt, Md.
>>(301) 286-2806
>>
>>RELEASE: 06-29
>>
>>NASA'S SPACE TECHNOLOGY 5 (ST5) STATUS REPORT
>>
>>In less than a month after launch, the ST5 team has checked out the ST5
>
>>spacecraft and successfully activated all technologies. All three
>>spacecraft are performing nominally, including attitude, thermal and
>power
>>profiles. Data are being collected on the performance of the spacecraft
>and
>>their advanced technologies, including demonstration science data from
>the
>>magnetometers.
>>
>>Miniaturized components and technologies are integrated into each of
>the
>>ST5 micro-satellites. Each micro-satellite weighs approximately 25
>>kilograms (55 pounds). These micro-sats are being tested in space in
>order
>>to validate the performance of these new technologies for future
>science
>>missions.
>>
>>"We are extremely pleased with the performance of our onboard
>technologies
>>and the ST5 mission is already a major success," said Art Azarbarzin,
>ST5
>>Project Manger at NASA's Goddard Space Flight Center, Greenbelt, Md.
>>
>>"We have begun demonstrating all of the New Millennium Program
>>technologies, including the low-voltage power system, X-band
>transponder
>>for space-to-ground communications, Cold Gas Micro-Thruster for
>spacecraft
>>maneuvering and attitude control, CMOS Ultra Low Power Radiation
>Tolerant
>>logic (CULPRiT) and Variable Emittance Coating thermal technologies, as
>
>>well as some of our ground system automation. We have also demonstrated
>the
>>capability of our micro-satellites' miniature magnetometers, sun
>sensors,
>>nutation dampers, magnetometer booms and launch vehicle deployment
>system."
>>
>>During the first week, the spacecraft went through a Lunar Eclipse and
>all
>>three behaved as expected. The batteries went through a
>discharge/recharge
>>cycle and this was the first time a battery discharge on all three
>>spacecraft had been observed since launch. Without any eclipse, solar
>>arrays are able to keep up with the power demand and charge the battery
>at
>>the same time.
>>
>>The ST5 mission operations team has begun commanding the spacecraft to
>>perform maneuvers that will position the spacecraft in a constellation
>>formation. The spacecraft will be aligned in a "string of pearls" so
>that
>>the spacecraft are approximately 100-200 km (60-124 miles) apart. The
>>spacecraft were initially separating at a rate of 25-200 km (15-124
>miles)
>>per day, so the maneuver strategy was designed to "stop" their
>separation
>>and then move the spacecraft closer together, using ST5's new
>technology
>>micro-thruster.
>>
>>The constellation formation will allow the three spacecraft to be
>>positioned simultaneously within a single "current sheet" within the
>>Earth's auroral region. Using the resulting magnetometer data, the ST5
>>science team will demonstrate the benefits of a group of small low-cost
>
>>spacecraft taking scientific measurements at the same time in different
>
>>locations.
>>
>>The ST5 project was built and tested at Goddard for NASA's Science
>Mission
>>Directorate. It is part of the New Millennium Program, which develops
>and
>>tests critical and revolutionary technologies needed to enable future
>>endeavors in space. For information about the ST5 project and mission
>on
>>the Web, visit:
>>
>><http://www.nasa.gov/st5>http://www.nasa.gov/st5
> >
>>Information on the New Millennium Program can be viewed on the Web at:
>>
>><http://nmp.jpl.nasa.gov/>http://nmp.jpl.nasa.gov
>>
>>
>>
>>- end -
>>
>>
>
>
>
>
>------------------------------
>
>Message: 11
>Date: Thu, 20 Apr 2006 16:13:16 -0400
>From: mattwriter at aol.com
>Subject: [FPSPACE] Scott Crossfield, RIP
>To: fpspace at friends-partners.org
>Message-ID: <8C832CDFE457381-984-EB8 at FWM-D43.sysops.aol.com>
>Content-Type: text/plain; charset="us-ascii"
>
>
> Any coward can sit in his home and criticize a pilot for flying into a
>mountain in a fog. But I would rather, by far, die on a mountainside
>than in bed. What kind of man would live where there is no daring? And
>is life so dear that we should blame men for dying in adventure? Is
>there a better way to die?
> - Charles Lindbergh
>
>
>------------------------------
>
>Message: 12
>Date: Thu, 20 Apr 2006 16:34:04 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] Eanna Flanagan hunts down gravity waves -- ripples
> in 'spacetime' -- in quest to
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F168139670CE60CF210401F9CBA0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>April 14, 2006
>
>Eanna Flanagan hunts down gravity waves -- ripples in 'spacetime' -- in
>quest to better understand the universe
>
>By Thomas Oberst
>
>Gravity is a familiar force. It's the reason for fear of heights. It
>holds
>the moon to the Earth, the Earth to the sun. It keeps beer from floating
>out
>of our glasses.
>
>But how? Is the Earth sending secret messages to the moon?
>
>Well, yes -- sort of.
>
>Eanna Flanagan, Cornell associate professor of physics and astronomy,
>has
>devoted his life to understanding gravity since he was a student at
>University College Dublin in his native Ireland. Now, nearly two decades
>
>after leaving Ireland to study for his doctorate under the famous
>relativist
>Kip Thorne at the California Institute of Technology, his work focuses
>on
>predicting the size and shape of gravitational waves -- an elusive
>phenomenon forecast by Einstein's 1916 Theory of General Relativity but
>which have never been directly detected.
>
>Full article here:
>
>http://www.news.cornell.edu/stories/April06/Flanagan.gravity.TO.html
>
>
>
>
>------------------------------
>
>Message: 13
>Date: Thu, 20 Apr 2006 18:07:13 -0400
>From: Chris Jones <clj at panix.com>
>Subject: [FPSPACE] Atlas V launch (so far) successful (and trivia
> question)
>To: fpspace at friends-partners.org
>Message-ID: <200604201807.13843.clj at panix.com>
>Content-Type: text/plain; charset="us-ascii"
>
>Today's Atlas V launch from the Cape is proceeding successfully, now in
>its
>cruise phase between the first and second firing of the Centaur upper
>stage.
>
>This was the first flight of the single SRM variant of the launcher.
>This
>strikes me as an unusual variant, as its the only combination of
>identical
>strap-ons that cannot be arranged symmetrically. Obviously this causes
>asymmetric thrust which the launcher has to be able to handle. I was
>thinking
>of what other launchers have this problem. Until I thought of the
>shuttle
>(d'oh!), I was thinking this might have been the first. That led me to
>Energiya, and I seem to recall that some of the Ariane 4 launchers flew
>with
>a mixture of solid and liquid strap-ons. Are there any others I haven't
>thought of?
>
>
>------------------------------
>
>Message: 14
>Date: Thu, 20 Apr 2006 15:23:10 -0700
>From: "Marc D. Rayman" <marc.d.rayman at jpl.nasa.gov>
>Subject: Re: [FPSPACE] Atlas V launch (so far) successful (and trivia
> question)
>To: fpspace at friends-partners.org
>Message-ID: <p06230900c06db881da27@[137.78.177.43]>
>Content-Type: text/plain; charset="us-ascii" ; format="flowed"
>
>
>At 6:07 PM -0400 4/20/06, Chris Jones wrote:
>>This was the first flight of the single SRM variant of the launcher.
>This
>>strikes me as an unusual variant, as its the only combination of
>identical
>>strap-ons that cannot be arranged symmetrically. Obviously this causes
>>asymmetric thrust which the launcher has to be able to handle. I was
>thinking
>>of what other launchers have this problem.
>
>I believe the Delta II 742x launch vehicle has this same problem.
>The 4 in the name indicates that it uses 4 strap-ons. While 4 could
>be arranged symmetrically in principle, the attachment points on the
>first stage for the strap-ons are dictated by the 792x configuration
>for reasons of hardware commonality. With the 9 evenly spaced
>attachment locations, flying only 4 introduces an asymmetry.
>
>Marc Rayman
>
>
>------------------------------
>
>Message: 15
>Date: Thu, 20 Apr 2006 23:46:58 +0100
>From: David M Harland <dave.harland at ntlworld.com>
>Subject: Re: [FPSPACE] Atlas V launch (so far) successful (and trivia
> question)
>To: fpspace at friends-partners.org
>Message-ID: <p0611040ec06dbfc22386@[86.4.217.140]>
>Content-Type: text/plain; charset="us-ascii" ; format="flowed"
>
>At 6:07 pm -0400 20/4/06, Chris Jones wrote:
>>Today's Atlas V launch from the Cape is proceeding successfully, now in
>its
>>cruise phase between the first and second firing of the Centaur upper
>stage.
>>
>>This was the first flight of the single SRM variant of the launcher.
>This
>>strikes me as an unusual variant, as its the only combination of
>identical
>>strap-ons that cannot be arranged symmetrically.
>
>The Atlas V that launched MRO had three on one side and two on the
>other.
>
>
>dmh
>
>> Obviously this causes
>>asymmetric thrust which the launcher has to be able to handle. I was
>thinking
>>of what other launchers have this problem. Until I thought of the
>shuttle
>>(d'oh!), I was thinking this might have been the first. That led me to
>>Energiya, and I seem to recall that some of the Ariane 4 launchers flew
>with
>>a mixture of solid and liquid strap-ons. Are there any others I
>haven't
>>thought of?
>>_______________________________________________
>>FPSPACE mailing list
>>FPSPACE at friends-partners.org
>>http://www.friends-partners.org/mailman/listinfo/fpspace
>
>
>
>------------------------------
>
>Message: 16
>Date: Fri, 21 Apr 2006 07:39:54 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] Operation To Correct ISS Orbit Fails
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F1169CF3CE1ACF8DC1410D19CBB0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>STATION NEWS
>
>- Operation To Correct ISS Orbit Fails
>
>http://www.spacedaily.com/reports/Operation_To_Correct_ISS_Orbit_Fails.h
>tml
>
>Moscow (AFP) Apr 21, 2006 - An attempt by scientists to raise the orbit
>of
>the
>International Space Station (ISS) failed early Thursday, Russian space
>officials
>said.
>
>
>
>
>------------------------------
>
>Message: 17
>Date: Fri, 21 Apr 2006 14:18:21 +0200 (CEST)
>From: Mgr. CSc. Anton?n V?tek <AVitek at seznam.cz>
>Subject: Re: [FPSPACE] Operation To Correct ISS Orbit Fails
>To: LARRY KLAES<ljk4 at msn.com>
>Cc: fpspace at friends-partners.org
>Message-ID: <2609.5921-14365-1200098329-1145621900 at seznam.cz>
>Content-Type: text/plain; charset="iso-8859-2"
>
>Only noted consewunce is the move of launch time of Progress M-56 set
>for Aprint 24th some tens of seconds later. Exact calculations will be
>done today (Friday).
>
>< ------------ P?vodn? zpr?va ------------
>< Od: LARRY KLAES <ljk4 at msn.com>
>< P?edm?t: [FPSPACE] Operation To Correct ISS Orbit Fails
>< Datum: 21.4.2006 13:40:05
>< ----------------------------------------
>< STATION NEWS
><
>< - Operation To Correct ISS Orbit Fails
><
><
>http://www.spacedaily.com/reports/Operation_To_Correct_ISS_Orbit_Fails.h
>tml
><
>< Moscow (AFP) Apr 21, 2006 - An attempt by scientists to raise the
>orbit of
>< the
>< International Space Station (ISS) failed early Thursday, Russian space
>
>< officials
>< said.
><
><
>< _______________________________________________
>< FPSPACE mailing list
>< FPSPACE at friends-partners.org
>< http://www.friends-partners.org/mailman/listinfo/fpspace
><
><
><
>
>
>Mgr. Antonin Vitek, CSc.
>
>Office: Main Library, Academy of Sciences of the Czech Republic
> Narodni 3, CZ-11522 Praha 1 - Phone: +420/221 403 255, fax +420/224
>240 611
>Home: Kytin 127, CZ-25210 Mnisek p. B., Czech Republic
>Phone: +420/318 592 865, cell +420/603 148 201 - Coord.: 14.2178 deg E,
>49.8485 deg N, 442 m ASL
>My satellite home page: http://www.lib.cas.cz/www/space.40/index.html
>Office e-mail: AVITEK at LIB.CAS.CZ
>
>
>------------------------------
>
>Message: 18
>Date: Fri, 21 Apr 2006 15:22:47 +0200 (CEST)
>From: Mgr. CSc. Anton?n V?tek <AVitek at seznam.cz>
>Subject: Re: [FPSPACE] mistake
>To: FPSpace <fpspace at friends-partners.org>
>Message-ID: <4474.8172-18968-875132830-1145625767 at seznam.cz>
>Content-Type: text/plain; format=flowed; charset="iso-8859-2";
> reply-type=original
>
>
>< ------------ P?vodn? zpr?va ------------
>< Od: Robert Holdsworth <robbonz1 at xtra.co.nz>
>< P?edm?t: Re: mistake
>< Datum: 21.4.2006 11:44:15
>< ----------------------------------------
>< Note also that the decayed object was 28504 2005-052A Sich 1M
>
>Sorry, but this is also in error. Sich 1M is 2004-052A 28505 ;-))
><
>< 23657 1995-046A Sich ! remains in orbit.
><
>< Not difficult to confuse objects with such similar names!
><
>< Robert
><
><
>< ----- Original Message -----
>< From: "msb" <msb2584 at adelphia.net>
>< To: <SeeSat-L at satobs.org>
>< Sent: Friday, April 21, 2006 12:58 PM
>< Subject: mistake
><
><
>< > it seems that i have observed cosmos 2151 sorry about the mistake
>the
>< > tle's
>< > i had for sich 1 were a perfect match.
>< > for cosmos so thus the mistake
>< >
>< >
>------------------------------------------------------------------------
>-
>< > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L
>archive:
>< > http://www.satobs.org/seesat/seesatindex.html
>< >
>< >
><
><
><
>------------------------------------------------------------------------
>-
>< Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L
>archive:
>< http://www.satobs.org/seesat/seesatindex.html
><
><
><
><
>
>
>Mgr. Antonin Vitek, CSc.
>
>Office: Main Library, Academy of Sciences of the Czech Republic
> Narodni 3, CZ-11522 Praha 1 - Phone: +420/221 403 255, fax +420/224
>240 611
>Home: Kytin 127, CZ-25210 Mnisek p. B., Czech Republic
>Phone: +420/318 592 865, cell +420/603 148 201 - Coord.: 14.2178 deg E,
>49.8485 deg N, 442 m ASL
>My satellite home page: http://www.lib.cas.cz/www/space.40/index.html
>Office e-mail: AVITEK at LIB.CAS.CZ
>
>
>------------------------------
>
>Message: 19
>Date: Fri, 21 Apr 2006 07:07:29 -0700
>From: David Anderman <davida at cwo.com>
>Subject: Re: [FPSPACE] Operation To Correct ISS Orbit Fails
>To: fpspace at friends-partners.org
>Message-ID: <7.0.1.0.2.20060421070621.0522a7f0 at cwo.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>This will be the first time since 2000 that these engines will be
>fired. I don't recall any of the Salyuts using their main engines
>after the first year in orbit. I had assumed that the Zvezda main
>engines were effectively mothballed.
>
>DWA
>
>
>
>------------------------------
>
>Message: 20
>Date: Fri, 21 Apr 2006 11:19:25 -0400
>From: "LARRY KLAES" <ljk4 at msn.com>
>Subject: [FPSPACE] Deep Impact Team Want To Go Back With A Bang
>To: fpspace at friends-partners.org
>Message-ID: <BAY114-F1559161B7E60DC2D6ED9D99CBB0 at phx.gbl>
>Content-Type: text/plain; format=flowed
>
>IRON AND ICE
>
>- Deep Impact Team Want To Go Back With A Bang
>
>http://www.spacedaily.com/reports/Deep_Impact_Team_Want_To_Go_Back_With_
>A_Bang.html
>
>College Park MD (SPX) Apr 21, 2006 - Over the past five years, three
>space
>missions -- Deep Impact, Deep Space 1 and Stardust -- have provided
>unprecedented information about comets. However, rather than clearing up
>the
>true nature of comets, the sometimes conflicting data from these
>missions
>have
>scientists questioning almost everything they thought they knew about
>these
>fascinating, and potentially dangerous, objects.
>
>
>
>
>------------------------------
>
>_______________________________________________
>FPSPACE mailing list
>FPSPACE at friends-partners.org
>http://www.friends-partners.org/mailman/listinfo/fpspace
>
>
>End of FPSPACE Digest, Vol 26, Issue 21
>***************************************
>
>_______________________________________________
>FPSPACE mailing list
>FPSPACE at friends-partners.org
>http://www.friends-partners.org/mailman/listinfo/fpspace
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