**The most comprehensive collection of Shuttle, Ares, Orion and ISS related presentations and mission documentation, plus expansive daily processing documentation and updates are <\/em>available to download on L2<\/em><\/font> **<\/em><\/font><\/p>\n STS-120 L2 Special now includes 20 Full FRR presentations (Oct 9-10) \u2013 the most expansive overview of the mission. **Click here for sample**<\/font><\/em><\/p>\n Now includes the STS-120: Joint SSP\/ISS FRR Chart Presentations (over 25mbs worth).<\/font><\/em><\/p>\n **LIVE news updates on Discovery STS-120 PAD Processing**<\/em><\/font><\/p>\n **LIVE news updates on Endeavour STS-123 Processing**<\/em><\/font><\/p>\n SpaceX launch tickets (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n **LIVE news updates on Atlantis STS-122 Processing**<\/em><\/font><\/p>\n Article:<\/u><\/em><\/p>\n The documents, from last week\u2019s two-day Shuttle FRR, rounded up the lengthy pre-flight evaluation process for each major flight element, revealing many interesting elements of the mission, not normally given media exposure.<\/p>\n \u2018Had pre-brief last week; well done by those who briefed. Got idea of how complicated STS-120 mission is,\u2019 noted Mission Management Team (MMT) chairman John Shannon. \u2018Must to stay focused on the extremely challenging on-orbit work and not be distracted by the pre-flight issues.\u2019 <\/p>\n Those pre-flight issues mainly related to the NESC recommendation to rollback Discovery, in order to replace three RCC panels. A review article on the highly interesting Joint SSP\/ISS FRR Charts that argued flight rationale relating to this dissent will be published soon (all October 16 FRR presentations on L2 now).<\/p>\n This is part 3 of this site\u2019s FRR review \u2013 Click here for **Part 1** and **Part 2**<\/em><\/p>\n STS-120 RSRM (Reusable Solid Rocket Motor) FRR (ATK)<\/em> <\/u><\/p>\n ATK\u2019s overview of the RSRM element of the boosters discussed flight history, booster age limits, and their decision to replace some of the segments \u2013 following the train accident in May. <\/p>\n The subject of a number of PRCB (Program Requirements Control Board) presentations, ATK again noted their flight rationale, after spotting a Joint 2 Gas Path\/Penetration issue.<\/p>\n This relates to a back-filled RTV seal on the joint, spotted on post-flight evaluations of the used booster from STS-118. The issue is no cause for concern, although ATK are working on a solution in time for STS-123.<\/p>\n This experience is gained from looking back over the history of the program, looking at heating effects noted on boosters over 30-40 previous flights into the past. <\/p>\n \u2018Leak path potential studied extensively. O-ring protected by large metal flanges and tight interfaces. No adverse performance trends. Risk of O-ring erosion is very low. Carbon fiber rope will eliminate RTV at RSRM-101 (STS-123).\u2019<\/p>\n Obviously, the performance of seals are extremely important, not least because of the mention that serious failures \u2013 or damaging effects on the seals \u2013 leads on to the mention of effects on the O-rings.<\/p>\n As reassurance, ATK provided a failure scenario scale, showing that it would take nine events on the chain to lead to blowby on the Secondary O-ring (boosters have three O-ring seals, as protection, since Challenger). The event observed on STS-118 does not breach the first of the nine events.<\/p>\n \u20181. Gas Path (No Heat Effects). 2 \u2013 Heat Affected Virgin CCP. 3 \u2013 Heat Affected GCP\/SCP. 4 \u2013 Heat Affected Paint\/Adhesive. 5 \u2013 Heat Affected Metal. 6 \u2013 Heat Affected\/Eroded Primary O-ring. 7 \u2013 Primary O-ring Failure (Blowby). 8 \u2013 Heat Affected\/Eroded Secondary O-ring. 9 \u2013 Secondary O-ring Failure (Blowby).\u2019<\/p>\n This list was also presented alongside a chart that showed the depth of heat effects on this area of the seal, showing that none of the previous 30-40 flights had ranked \u20185\u2019 \u2013 which is listed as a \u2018challenge to flight rationale\u2019 \u2013 with STS-118\u2019s event only ranking \u20181\u2019 and \u20183\u2019. <\/p>\n \u2018PRCB Briefing 6 Sep 2007 \u2013 No Issues. RSRB Project Approved \u2013 13 Sep 2007. Final closure \u2013 14 Sep 2007. Carbon-fiber rope effective STS-123. Joint No. 2 Performed as Expected \u2013 Consistent with Flight History. Established Flight Rationale is not Challenged. No Constraints to Launch of STS-120.\u2019 <\/p>\n RSRM-98 is the set that will fly with STS-120, although two forward segments have been replaced by those previously set to fly on STS-122 \u2013 namely LH (Left Hand) and RH (Right Hand) forward segments RSRM-99. This relates to the accident that saw a bridge collapse under the train carrying the segments, causing it to derail.<\/p>\n It is not fully known if both forward segments were deemed as unusable, given if a single segment is damaged, then the same segment from the other booster would be removed and replaced with its \u2018twin\u2019, due to the potential issue of a thrust imbalance. With both forward segments replaced, this issue is mitigated. <\/p>\n In regards to the RSRM segments that were affected by the train accident, even though they may have appeared to be undamaged, ATK are not taking any chances, and have removed them from ever flying with the shuttle. Affected elements involved in the accident could be used on an Ares 1-X type demo flight, and certain parts of the hardware could be recycled (washed out and recovered). <\/p>\n Because of the delay in the shuttle program in the wake of the Columbia disaster, many of the segments now being prepared to fly are pushing the previous age limit of five years. However, extensive testing and evaluations \u2013 which took place ahead of this year\u2019s STS-117 \u2013 extended the lifetime to allow boosters with segments over five years old to fly.<\/p>\n \u2018Flight Specific Age-Life: 5-year age-life certification is good through 23 Oct 2007 (TIGA bonds). All hardware will be within age-life certification requirements at time of launch on 23 Oct 2007 \u2013 no margin. STS-120 flight-specific age-life extension to 5.5 years has been approved by the RSRB Project (Safety Issue Briefing to PRCB 13 Sep 2007 \u2013 no issues).<\/p>\n \u2018Aging data, flight-specific witness panel testing, propellant loaf samples, and potential interactions with changes and non-conformances reviewed \u2013 no issues. Age-life extension to 5.5 years is good through 23 Apr 2008. Limiting requirement is now 180-day pad stay. Initial rollout 30 Sep 2007 \u00e2\u20ac\u201c good through 28 Mar 2008. One-year stack-life good through 18 Jul 2008.\u2019<\/p>\n <\/u><\/i><\/b><\/p>\n STS-120 RSRB (Reusable Solid Rocket Booster) FRR (USA)<\/p>\n<\/p>\n United Space Alliance\u2019s presentation on the RSRB element of the boosters (which they are responsible for) gave an insight into the continued push to cover all the bases \u2013 and them some \u2013 on being able to track any debris liberation events in high detail during ascent.<\/p>\n \u2018Modified RH Forward Skirt Aft Pointing (FSAP) camera for one-flight only,\u2019 noted the presentation. \u2018Background: External Tank (ET) requested imagery of redesigned Liquid Hydrogen (LH2) Ice Frost Ramps (IFR) to assess performance. Required camera rotation and field of view expansion.<\/p>\n \u2018Includes: Modified wedge plate, rotated camera 5.5 degrees and changed camera lens from 12 mm to 6 mm. Incorporated new settings to brighten camera image into permanent engineering. Modified window cover plate to remove small section causing image inclusion.\u2019<\/p>\n USA\u2019s presentation also included a risk matrix, which notably was the \u2018greenest\u2019 of all risk matrix\u2019s presented to the FRR, even though this was a slight increase on the previous flight \u2013 STS-118.<\/p>\n \u20181\u00d73 (Improbable\/Catastrophic \u2013 Green): 1725 increased to 1759. 34 Causes for SRB Structural Failure (documenting baseline). No increase in accepted risk,\u2019 which despite it\u2019s wording, is highly acceptable flight rationale for such a complex vehicle.<\/p>\n \u2018Pending completion of open work, there are no constraints to continue launch processing for STS-120,\u2019 USA concluded.<\/p>\n L2 members<\/font>: All documentation and quotes \u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, updated live.<\/em><\/p>\n **STARLIGHT: NEW STS-117 MISSION REVIEW MUSIC VIDEO** \u2013 STS-118 Mission review video also available.<\/font><\/em><\/font> <\/em><\/font><\/p>\n **ROCK YOU LIKE A HURRICANE: STS-117 MISSION REVIEW MUSIC VIDEO \u2013 AS SEEN BY THE STS-117 CREW!!**<\/font> -. Shuttle Discovery\u2019s twin Solid Rocket Boosters (SRBs) will be debuting a new, modified, problem-hunting camera on STS-120, as revealed in Flight Readiness Review (FRR) documentation, which also noted how two booster segments had to be replaced. The FRR was also given an overview of flight rationale on the age extension of the booster segments and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[],"class_list":["post-41573","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41573"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=41573"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41573\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/em><\/font>Extensive STS-120 Special Section on L2 now live, including Flight Plans, Handbooks, Manuals, documentation and presentations. STS-122 to STS-127 documentation already available.<\/em><\/font><\/p>\n
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\u2018Gas Penetrations Through LH\/RH Nozzle Joint No. 2 RTV. Cause is understood,\u2019 noted ATK\u2019s presentation to the FRR. \u2018Good technical understanding of nozzle joint no. 2. Thermal analyses show joint no. 2 is fault tolerant. Condition of STS-118 is within experience.\u2019 <\/p>\n
\u2018Original RSRM-98 forward segments returned to Utah after trestle collapse (May 2007). Former RSRM-99 forward segments reassigned to RSRM-98,\u2019 ATK noted. \u2018Reassigned hardware meets requirements. Center segments on aft (unaffected) end of the train are acceptable. Engineering Data Recorder data within requirements and history. Detailed physical inspection at KSC.\u2019<\/p>\n
A new addition to the booster is a Modified RH Forward Skirt Aft Pointing (FSAP) Camera, which will make this flight only, as part of a request to take a closer look at the performance of the Ice Frost Ramps on the External Tank (ET).<\/p>\n
(Video section is FREE, but you need to sign up as a member of the forum to enter the video section of the site. We only use your e-mail to send you your password. It will not be used for spam etc.)<\/em><\/font><\/em>
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