**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-122 L2 Special NOW LIVE. **Click here for sample of L2 menu and content**<\/font><\/em><\/p>\n <\/font>**STS-122 Mission Documentation Build-Up Surge already in work on L2 \u2013 now including 12 MOD Flight Readiness Review (FRR) Presentations \u2013 Nov 5, Baselines and Mission Overviews.<\/font><\/em><\/p>\n **Now includes 17 Shuttle FRR Presentations \u2013 Nov 13**<\/p>\n **LIVE updates on Discovery STS-120 Post Flight and STS-124 Processing**<\/em><\/font><\/p>\n **LIVE news updates on Atlantis STS-122 Pad Processing**<\/em><\/font><\/p>\n <\/u><\/em><\/p>\n Rocket launch schedules (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<\/p>\n **LIVE news updates on Endeavour STS-123 Processing**<\/font><\/em><\/p>\n Article: <\/p>\n<\/p>\n <\/em> <\/p>\n The Shuttle FRR is by far the most fascinating element of the multi-leg review process, with a vast amount of overview material produced for engineers and managers to pore over. <\/p>\n Every key element of the mission is presented to the finest detail, via graphical and data rich presentations that are major testament to the thousands of engineers and technicians that allow for the safe flight of the world\u2019s most complex flying machine. <\/p>\n Over 17 elements are covered by the Shuttle level FRR, with one of those presentations \u2013 relating to ATK\u2019s Reusable Solid Rocket Motor (RSRM) \u2013 reviewed below.<\/p>\n STS-122 RSRM FRR:<\/u><\/em> <\/p>\n \u2018Original RSRM-99 forward segments were reassigned to RSRM-98 (STS-120) after trestle\/bridge collapse (May 2007),\u2019 noted the presentation. \u2018Former RSRM-100 forward segments replaced the reassigned forward segments on STS-122. Original RSRM-99 center segments (not on train) swapped sides to reduce predicted thrust imbalance.<\/p>\n \u2018Original RSRM-99 aft segments were involved in the trestle collapse and were returned to Utah. Former RSRM-100 aft segments replaced the returned aft segments on STS-122. Original RSRM-99 AECs remain on STS-122. Involved in trestle collapse; however, car remained upright on undamaged portion of track.\u2019<\/p>\n New \u2018Nozzle-to-Case J-leg Joint\u2019 safety improvement:<\/u><\/em><\/p>\n A large section of the 44 page presentation is dedicated to a safety improvement that has been under development until now, namely the new Nozzle-to-Case J-leg Joint insulation configuration.<\/p>\n \u2018RSRM nozzle-to-case joint experienced gas paths through the polysulfide to the wiper O-ring in approximately 1 out of 8 motors,\u2019 noted the presentation\u2019s reason for change. \u201917 total gas paths to the wiper O-ring in RSRM experience (151 motors) \u2013 no occurrences of primary O-ring erosion.<\/p>\n \u2018Intermediate fix \u2013 \u2018polysulfide bump\u2019 \u2013 first flown on STS-104 (RSRM-80) with no gas paths to wiper O-ring.\u2019<\/p>\n Despite the large scale redundancy associated with the seals on the motors and boosters as a whole \u2013 brought in after the Challenger disaster \u2013 and the lack of any major concerns associated with the gas paths from flight experience, ATK are debuting this improvement to completely remove the gas path at the source.<\/p>\n \u2018J-leg insulation ensures motor combustion gasses do not penetrate joint,\u2019 added the presentation. \u2018J-leg is manufactured with 0.5\u201d radically inward displacement. Nozzle insertion deflects the ASNBR J-leg outboard, resulting in a tight interference (stretch) fit. <\/p>\n \u2018Reduced gaps between fixed housing and insulation aft of CFR minimize free volume. Compression against fixed housing on ignition, further reduces potential to heat effect the leak-check barrier O-ring. Thin PSA to CCP bondline \u2013 eliminates voids and potential hot gas volume fill. CFR thermal barrier cools any volume filling hot gas to below 400 degrees F.\u2019<\/p>\n \u2018Carbon fiber Rope (CFR) employed as joint redundant thermal barrier. In the event hot chamber gas reaches the CFR, CFR allows downstream volume to pressurize in a controlled fashion while dissipating heat and filtering out particulates,\u2019 claim ATK.<\/p>\n \u2018Braided rope is very permeable: high heat capacity of carbon fibers combined with large surface area allows efficient removal of heat from combustion gas. CFR certified as part of Nozzle-Case Joint on RSRM via robust development and qualification program.\u2019<\/p>\n The combination of the joint design improvements ultimately mean the area of the motor is now fault tolerant, even in a simulated worst case scenarios \u2013 as certified via a rigorous testing process, and review by the Marshall Space Flight Center (MSFC).<\/p>\n \u2018Testing, structural and thermal analyses verified joint will perform as-designed. Demonstrated on seven aft dome articles including nozzle joint-assembly-disassembly (NJAD) and nozzle joint environment simulation (NJES) tests. Evaluated on MNASA-9 and MNASA-10 motor tests. Inspection verifies molded joint configuration meets all dimensional requirements. <\/p>\n \u2018Processes demonstrated to be repeatable (7 articles, 8 static tests, 10 flight assemblies). Remaining accepted risk causes evaluated and accepted. Demonstrated on FSM-9 through FSM-13, FSM-14 CTR joint, ETM-3 and PRM-1. <\/p>\n \u2018CFR in-place and no evidence of combustion gas penetration beyond jointbondline. STS-122 and subsequent are safe to fly.\u2019 New ATK Booster Separation Motors:<\/u><\/em><\/p>\n Also making their debut on STS-122 are a new set of ATK built Booster Separation Motors (BSMs), a process that started back in 2003, and will eventually see new aft BSMs flying with Atlantis on her flight to service the Hubble Space Telescope on STS-125.<\/p>\n \u2018STS-122 will be the first flight utilizing ATK-produced BSMs. Placed in the forward positions only. During contract transition, select changes to heritage BSM design were pursued. Heritage motor has proven to be reliable and effective,\u2019 listed ATK\u2019s design comparison to the previous BSMs. <\/p>\n The new BSMs sport a number of modifications, ranging from a redesigned ignitor, interchangeable metal components (eliminates matched sets), decreased O-Ring Groove Depths (increased O-Ring squeeze), along with new adhesives and paints, among other items.<\/p>\n \u2018Certification complete for forward configuration BSM. ATK BSMs are qualified for flight having undergone a rigorous certification process based on analysis, testing, inspection and similarity. Compliance to all requirements documented in BSM Master Verification Matrix.<\/p>\n Further articles will follow, reviewing other key elements of the FRR \u2013 which include another note of concern relating to the RCC panels by NESC \u2013 though this time STS-120\u2019s flight rationale counters any potential delay to Atlantis\u2019 launch, and new findings on the SARJ metallic samples brought back on STS-120, major EVA notes, among several other notes of interest.<\/p>\n All the presentations can be downloaded from L2. **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> -. NASA successfully completed STS-122\u2019s Shuttle level Flight Readiness Review (FRR) on Tuesday, moving the pre-launch process forward to the final Agency level FRR at the end of this month. NASASpaceflight.com\u2019s review of the FRR\u2019s vast array of documentation begins with an overview of the newly improved Solid Rocket Boosters, with two major modifications making their […]<\/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-41548","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41548"}],"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=41548"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41548\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/em><\/font>L2: STS-122 to STS-127 documentation already available.<\/em><\/font><\/p>\n
\n<\/u><\/p>\n**Ride home through the fire, sparks and plasma of re-entry with Atlantis, Discovery and Endeavour. FIVE Stunning high quality 2hr, 355-400mb Camcorder and HUD videos \u2013 from payload bay closure \u2013 through re-entry with an astronaut held camcorder video \u2013 to post landing \u2013 several more videos showing landing from 90,000 ft also available and HUD videos from STA landings. Now includes HALO II Re-entry video, and re-entry videos from Gemini and Apollo (converted from 8mm)**<\/em><\/font><\/p>\n
RSRM-99 is the set that will fly with STS-122, although \u2013 as with STS-120\u2019s RSRM-98 \u2013 segment changes are in effect. This relates to the accident that saw a bridge collapse under the train carrying the segments<\/font><\/u>, causing it to derail.<\/p>\n
As the name suggests, the improvement relates to seals between the nozzle of the motor and the surrounding case, utilizing a pressure-assisted J-leg, carbon-fiber rope (CFR) and a leak check barrier O-ring, in order to eliminate the potential gas paths, observed on a fraction of previous flights.<\/p>\n
The CFR (Carbon-Fiber Rope) is \u2013 as the name also suggests \u2013 a rope that ingeniously acts as a heat barrier, that not only protects heat from escaping, but is capable of exchanging 5,000 degree F hot combustion gas into less than 400 degree F cool gas.<\/p>\n
<\/p>\n
\u2018Utilized on flight throughout the life of the program. Minimize risk through the use of standardized ATK processes. Improve margins. ATK-produced BSMs pose no significant change in risk for the Space Shuttle Program.\u2019<\/p>\n
\u2018Full-scale motor (42 full scale tests) and component level testing. Full-scale qualification motor testing includes a 17-motor matrix with varying parameters. 25 full-scale motors test fired. Flight of ATK BSMs: No Significant Change in Risk to the SSP (Space Shuttle Program).\u2019 <\/p>\n
<\/em>L2 members<\/em><\/font>: All documentation, images 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
(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><\/font><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"