**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 <\/font>**STS-122 Special: 29 Flight Readiness Review (FRR) Presentations, Baselines and Mission Overviews. **Click here for FRR overview articles: <\/font><\/em>Article 1<\/em><\/font><\/font> \u2013 <\/em><\/font>Article 2<\/em><\/font><\/font>**<\/em><\/font> Payload Presentations and vast amounts of live, uploaded images and presentations, movies (several) \u2013 already 2400 megabytes strong** <\/em><\/p>\n **COMPLETE Section \u2013 over 1100mbs of presentations \u2013 on ECO\/Feedthrough Connector issues and troubleshooting, graphical and data based \u2013 expansive.**<\/p>\n **LIVE updates on Atlantis STS-122 Troubleshooting Latest**<\/em><\/font><\/p>\n **LIVE updates on Discovery STS-124 Processing**<\/em><\/font><\/p>\n <\/u><\/em><\/p>\n<\/p>\n Space Shuttle models (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<\/p>\n **LIVE news updates on Endeavour STS-123 Processing**<\/font><\/em><\/p>\n STS-122 ECO related news content: *Scrub 1* \u2013 *MMT Debate* \u2013 *Scrub 2* \u2013 *Hale Memo* \u2013 *Forward Plan* \u2013 *Culprit Found* \u2013 *Tanking Test* \u2013 *Repair Options* \u2013 *MAF Plan* \u2013 *PRCB Debate* \u2013 *Plan Approved* \u2013 *Repair Schedule* \u2013 *Launch Date* \u2013 *New Issue* \u2013 *Hale Rallying Call* \u2013 *PRCB Launch Dates* \u2013 *New Connector Installed* \u2013 *Positive Test Results* \u2013 *Manifest Impacts* \u2013 *Optimism with forward plan* \u2013 *Flight Rationale*<\/p>\n Booster Improvements:<\/u><\/em><\/p>\n The improvements to the boosters \u2013 which provide the majority of the thrust to the stack for the two minutes of first stage flight \u2013 have been years in development. <\/p>\n STS-122\u2019s improvements to its RSRM-99 set was revealed in an expansive FRR (Flight Readiness Review) presentation, whereas additional improvements to STS-123\u2019s RSRM-101 set are noted in a PRCB (Program Requirements Control Board) presentation, utilized to rubber stamp the \u2018increase in safety\u2019 by the Shuttle Program\u2019s Safety and Mission Assurance Office. <\/p>\n While the improvements have been previously certified ahead of the production of the flight sets, NASA managers collate the paperwork surrounding any changes, for safety overviews ahead of flight. <\/p>\n \u2018Objective: Obtain PRCB approval of Hazard Report updates related to CFR. Background \u2013 Change Description: WAS: Nozzle Joint 2 backfilled with RTV as a thermal barrier. IS: Nozzle Joint 2 will have a CFR as a thermal barrier,\u2019 noted the presentation, available on L2. \u2018WAS: Nozzle Joint 5 buttered with RTV as a thermal barrier. IS: Nozzle Joint 5 will have a CFR as a thermal barrier.\u2019<\/p>\n Observations that gas paths have formed on a fraction of previous boosters called for the modification. There wasn\u2019t a safety issue or risk associated with the findings, given the numerous layers of protection before the gas paths cause any primary O-ring erosion. However, the addition of a CFR mitigates the risk of a gas path forming. <\/p>\n \u2018Carbon Fiber Rope (CFR) cools the volume filling combustion gasses prior to pressurization of the o-rings. CFR dissipates heat and blocks particulates in combustion gasses,\u2019 added the presentation. <\/p>\n \u2018Basis of Certification: Structural analysis shows CFR in joint has no effect on margins of safety; No compatibility concerns. Aero-thermal analysis using worst-case thermal conditions and flawed CFR, predicts adequate joint protection (no O-ring erosion).\u2019<\/p>\n \u2018Successful testing in sub-scale motors and full scale motors: Four sub-scale MNASA motors. Nine full-scale motors (FSM-9, -10, -11, -12, -13, -14; ETM-2, ETM-3; and PRM-1). ETM-2 flawed CFR in flight configuration. ETM-3 margin test (5-segment motor).\u2019<\/p>\n The tests showed that the use of the rope mitigated gas paths through the first of nine \u2018barriers of safety\u2019 \u2013 built in since the loss of Challenger in 1986, and improved on since. <\/p>\n The presentation notes that all nine safety barriers would need to be breached before the \u2018catastrophic\u2019 risk of blow-by through the secondary O-ring could be observed.<\/p>\n An additional change is seen via a new bolt design in joint 5 of the motor nozzle. The shorter bolt eliminates bolt corrosion \u2013 as previously observed \u2013 in addition to a number of improvements.<\/p>\n \u2018All margins remain positive. Slight increase in primary seal gap opening. 2X O-ring tracking still met. New bolt eliminates bolt corrosion potential experienced in the past. High hand torque issues resolved with redesigned joint processing.\u2019<\/p>\n This improvement also has been a long time in development, originally passing on from ATK to MSFC (Marshall Space Flight Center) for approval in 2004, before finally becoming flight hardware for STS-123 and beyond.<\/p>\n \u2018STS-123 (RSRM-101) and subsequent are safe to fly. Risk Assessment: Decrease in Risk. No Minority and\/or Dissenting Opinions. No additional risk mitigations,\u2019 rounded up the presentation. \u2018Implementation of Joint 2 and 5 CFR and Joint 5 Bolt Enhancements have been assessed as: A Decrease in Risk.\u2019<\/p>\n Another overview of these modifications is expected to be presented by ATK as part of the STS-123 Flight Readiness Review (FRR) in just over a month\u2019s time. <\/p>\n Meanwhile, the STS-123 stack is taking shape inside the Vehicle Assembly Building (VAB), in preparation for Endeavour\u2019s launch date \u2013 a date that has moved up by two days, to March 11, in order to aid \u2018margin\u2019 for the Russian Soyuz launch in April. <\/p>\n Most of the STS-123 work is concentrated on ET-126, with parallel LH2 Feed-through connector re-work, following the go-ahead to mirror the forward plan being utilized on ET-125 (STS-122) out at Pad 39A.<\/p>\n \u2018Build up of the modified feed through connector for this ET is in progress. The work on the ET, as well as the short pad turn-around time after the STS-122 launch are competing to be considered the critical path to meet the 3\/13 launch date,\u2019 noted processing information. <\/p>\n \u2018Additionally the shuttle program has challenged KSC to attempt to meet an earlier launch date in an effort to provide more margin for downstream activities like the April Soyuz launch. As for now, March 13th is the date we\u2019re using for planning purposes.\u2019 (NASA has now confirmed March 11 as the new launch NET (No Earlier Than). **STARLIGHT: NEW STS-117 MISSION REVIEW MUSIC VIDEO** \u2013 STS-118 and STS-120 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> -. Another safety improvement to the Solid Rocket Boosters has been revealed in safety documentation, drawn up to approve the changes ahead of the flight of Endeavour on STS-123 \u2013 which has seen its launch date move up to March 11. A redesign to RSRM (Reusable Solid Rocket Motor) Nozzle Joints 2 and 5 \u2013 the […]<\/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-41497","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41497"}],"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=41497"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41497\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/em><\/font>STS-122 L2 Special NOW LIVE. <\/em><\/font>**Click here for sample of L2 menu and content**<\/font><\/em><\/p>\n
Both improvements center around the decrease in risk of potential gas paths in the motor\u2019s seals (O-ring to Case), with the implementation of a carbon-fiber rope (CFR). <\/p>\n
Interestingly, the presentation also shows the vast amount of testing and analysis that takes place ahead of any changes or additions to the motors, including numerous tests on motor firings at ATK\u2019s test range in Utah. It also notes one test on a five segment motor, possibly showing this implementation will carry heritage through to Ares I and Ares V. <\/p>\n
\u2018Redesigned bolted joint incorporates a new bolt, new special washer, and shim. Improved ability to analyze bolted assembly structure by reducing \u2018plastic behavior\u2019 of the joint. Test results showed that joint skip and bolt bending are significantly reduced. Slight increase in phenolic bondline stresses,\u2019 added the presentation. <\/p>\n
<\/em>L2 members<\/em><\/font>: All documentation \u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, updated live.<\/em><\/p>\n
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