{"id":8289,"date":"2014-07-11T00:44:14","date_gmt":"2014-07-11T04:44:14","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=8289"},"modified":"2014-07-11T00:44:14","modified_gmt":"2014-07-11T04:44:14","slug":"isee-3-reboot-project-investigating-possible-solution-to-propulsion-failure","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=8289","title":{"rendered":"ISEE-3 Reboot Project investigating possible solution to propulsion failure"},"content":{"rendered":"<p>The <a href=\"http:\/\/spacecollege.org\/isee3\/\" target=\"_d\">ISEE-3 Reboot Project<\/a>\u00a0(see posts <a href=\"http:\/\/hobbyspace.com\/Blog\/?p=8058\">here<\/a>, <a href=\"http:\/\/hobbyspace.com\/Blog\/?p=8184\">here<\/a>, and <a href=\"http:\/\/hobbyspace.com\/Blog\/?p=8237\">here<\/a>) appeared to suffer a serious and irreversible setback this week when they were unable to fire the propulsion system to change the spacecraft&#8217;s\u00a0trajectory. While hydrazine fuel still remained in the tank, there did not appear to be any nitrogen to push the fuel into the engine :\u00a0<a href=\"http:\/\/www.spacenews.com\/article\/civil-space\/41197curtain-falls-on-isee-3-reboot-project-as-propulsion-system-fails?utm_content=buffer08c1f&amp;utm_medium=social&amp;utm_source=twitter.com&amp;utm_campaign=buffer\" target=\"_d\">Curtain Falls on ISEE-3 Reboot Project as Propulsion System Fails &#8211;\u00a0SpaceNews.com<\/a>.<\/p>\n<p>Now there is some hope that the nitrogen has not leaked out but has dissolved into the hydrazine. The group is asking for help from anyone who might know how to deal with this:<\/p>\n<ul>\n<li><a href=\"http:\/\/spectrum.ieee.org\/tech-talk\/aerospace\/robotic-exploration\/fresh-hope-for-recapturing-an-abandoned-nasa-spacecraft\" target=\"_d\">Fresh Hope for an Abandoned NASA Spacecraft &#8211; IEEE Spectrum<\/a><\/li>\n<li><a href=\"http:\/\/spacecollege.org\/isee3\/isee-3-reboot-project-seeks-your-help-to-solve-a-technical-problem.html\" target=\"_d\">ISEE-3 Reboot Project Seeks Your Help To Solve a Technical Problem &#8211; Space College<\/a><\/li>\n<\/ul>\n<p>The team asks:<\/p>\n<p style=\"padding-left: 30px;\">\u00a0<em>Did the Nitrogen pressurizing gas dissolve in the Hydrazine in the tanks?<\/em><\/p>\n<p style=\"padding-left: 30px;\"><em>This is something that we would like to research and for efficiencies sake and to get the job done quicker, we would like our project fans out there to help us in this research. I am reading an old USAF document on this now and it may be nothing, but it also may be something. We need to research the following:<\/em><\/p>\n<p style=\"padding-left: 30px;\"><em>&#8211; What is the solubility of Nitrogen in Hydrazine?<\/em><br \/>\n<em>&#8211; What is the temperature dependence?<\/em><br \/>\n<em>&#8211; Most important, what is the time required to dissolve 1 kg of Nitrogen in 15 kg of Hydrazine? This is an approximation for both tank systems of course.<\/em><\/p>\n<p style=\"padding-left: 30px;\"><em>This is important. Don&#8217;t just throw stuff on the wall, help us research this.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ISEE-3 Reboot Project\u00a0(see posts here, here, and here) appeared to suffer a serious and irreversible setback this week when they were unable to fire the propulsion system to change the spacecraft&#8217;s\u00a0trajectory. While hydrazine fuel still remained in the tank, there did not appear to be any nitrogen to push the fuel into the engine &hellip; <a href=\"https:\/\/hobbyspace.com\/Blog\/?p=8289\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">ISEE-3 Reboot Project investigating possible solution to propulsion failure<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[35,31,26],"tags":[],"class_list":["post-8289","post","type-post","status-publish","format-standard","hentry","category-diy-space","category-solar-science","category-space-systems"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-29H","jetpack-related-posts":[{"id":8690,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8690","url_meta":{"origin":8289,"position":0},"title":"ISEE-3 project update and plans","author":"TopSpacer","date":"August 29, 2014","format":false,"excerpt":"Dennis Wingo gives an update on the ISEE-3 reboot satellite\u00a0\u00a0project, including what it accomplished and what they hope to do next\u00a0:\u00a0ISEE-3 Post Lunar Flyby Status and Modification of Mission Goals - \u00a0denniswingo Mission Status Communication with the ISEE-3 satellite was successfully re-established with the goal of commanding the satellite to\u2026","rel":"","context":"In &quot;DIY space&quot;","block_context":{"text":"DIY space","link":"https:\/\/hobbyspace.com\/Blog\/?cat=35"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8324,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8324","url_meta":{"origin":8289,"position":1},"title":"ISEE-3 Reboot Project: Update on thruster debugging with crowd-sourced expertise","author":"TopSpacer","date":"July 16, 2014","format":false,"excerpt":"I\u00a0posted\u00a0earlier that the reports that the\u00a0ISEE-3 Reboot Project\u00a0had given up on\u00a0restarting the propulsion system\u00a0were premature. Project member Dennis Wingo gives a detailed account of the crowd-sourced investigation\u00a0into what is going on with the thrusters and into\u00a0possible solutions to the failure to get substantial thrust from them:\u00a0We Are Borg: Crowdsourced ISEE-3\u2026","rel":"","context":"In &quot;DIY space&quot;","block_context":{"text":"DIY space","link":"https:\/\/hobbyspace.com\/Blog\/?cat=35"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8510,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8510","url_meta":{"origin":8289,"position":2},"title":"ISEE-3 citizen science mission","author":"TopSpacer","date":"August 7, 2014","format":false,"excerpt":"Since my\u00a0last post on\u00a0the\u00a0ISEE-3 Reboot Project, the team determined that it was impossible to restart the propulsion system\u00a0due to the absence of the nitrogen pressurant gas needed to force fuel into the thrusters. They spacecraft therefore cannot be put into an orbit in the Earth-Moon system and will instead continue\u2026","rel":"","context":"In &quot;Solar Science&quot;","block_context":{"text":"Solar Science","link":"https:\/\/hobbyspace.com\/Blog\/?cat=31"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8357,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8357","url_meta":{"origin":8289,"position":3},"title":"Latest from the ISEE-3 Reboot Project","author":"TopSpacer","date":"July 19, 2014","format":false,"excerpt":"There's an account of the ISEE-3 Reboot Project in the NY Times:\u00a0Rebooting ISEE-3: Space for All - NYTimes.com Government space missions are expensive. New private-sector space ventures always seem to involve billionaires. Yet we achieved results by raising funds a few dollars at a time \u2014 and by involving our\u2026","rel":"","context":"In &quot;DIY space&quot;","block_context":{"text":"DIY space","link":"https:\/\/hobbyspace.com\/Blog\/?cat=35"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":7969,"url":"https:\/\/hobbyspace.com\/Blog\/?p=7969","url_meta":{"origin":8289,"position":4},"title":"ISEE-3 Reboot Project takes command of the spacecraft","author":"TopSpacer","date":"May 29, 2014","format":false,"excerpt":"The\u00a0ISEE-3 Reboot Project\u00a0(see earlier post)\u00a0is now talking with the spacecraft : We Are Now In Command of the ISEE-3 Spacecraft The ISEE-3 Reboot Project is pleased to announce that our team has established two-way communication with the ISEE-3 spacecraft and has begun commanding it to perform specific functions. Over the\u2026","rel":"","context":"In &quot;DIY space&quot;","block_context":{"text":"DIY space","link":"https:\/\/hobbyspace.com\/Blog\/?cat=35"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8058,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8058","url_meta":{"origin":8289,"position":5},"title":"ISEE-3 Reboot Project update","author":"TopSpacer","date":"June 8, 2014","format":false,"excerpt":"The\u00a0ISEE-3 Reboot Project\u00a0(see the recent\u00a0post\u00a0ISEE-3 Reboot Project takes command of the spacecraft) continues to make progress in the effort to resurrect and re-target NASA's\u00a0International Sun-Earth Explorer (ISEE-3) spacecraft, launched in 1978 to study the earth's magnetosphere but re-targeted to study two comets. \u00a0the Reboot Project will try to return the\u2026","rel":"","context":"In &quot;DIY space&quot;","block_context":{"text":"DIY space","link":"https:\/\/hobbyspace.com\/Blog\/?cat=35"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/CLPG15HXkv8\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/8289","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8289"}],"version-history":[{"count":1,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/8289\/revisions"}],"predecessor-version":[{"id":8290,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/8289\/revisions\/8290"}],"wp:attachment":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}