{"id":3912,"date":"2016-09-19T23:56:56","date_gmt":"2016-09-19T21:56:56","guid":{"rendered":"http:\/\/spaceteam.at\/?p=3912&amp;lang=en"},"modified":"2016-09-19T23:56:56","modified_gmt":"2016-09-19T21:56:56","slug":"from-0-to-1200-kmh-within-one-second-supersonic","status":"publish","type":"post","link":"https:\/\/wptest3.tust.at\/index.php\/2016\/09\/19\/from-0-to-1200-kmh-within-one-second-supersonic\/","title":{"rendered":"From 0 to 1200 km\/h within one second: Supersonic!"},"content":{"rendered":"<p>After waiting a long time we did it finally: The first supersonic flight of a rocket of the TU Wien Space Team was performed successfully.<\/p>\n<p>[table id=9 \/]<\/p>\n<div id='gallery-1' class='gallery galleryid-3912 gallery-columns-2 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wptest3.tust.at\/vlcsnap-2016-08-28-00h20m48s558\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/vlcsnap-2016-08-28-00h20m48s558-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-3855\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-3855'>\n\t\t\t\tIgnition of the motor\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wptest3.tust.at\/vlcsnap-2016-09-05-19h18m05s206\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/vlcsnap-2016-09-05-19h18m05s206-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-3800\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-3800'>\n\t\t\t\tA noteable plume!\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wptest3.tust.at\/dsc_0626\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/DSC_0626-e1473232155631-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-3794\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-3794'>\n\t\t\t\tLanding approach with the main parachute\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wptest3.tust.at\/dsc_0631\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/DSC_0631-e1473232184368-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-3795\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-3795'>\n\t\t\t\tMission accomplished!\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<p>With a maximum acceleration beyond 30g, comparable to\u00a0<a href=\"http:\/\/spaceteam.at\/rockets\/the-hound\/\">The Hound<\/a>, the rocket was accelerated to a velocity of 390 m\/s within 1.4 seconds. The real airspeed could only be determined via integration of the accelerometer data due to the lack of a absolute velocimeter.<\/p>\n<p><a href=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-3872\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed-1024x439.png\" alt=\"STR06_K1100_acc_airspeed\" width=\"940\" height=\"403\" srcset=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed-1024x439.png 1024w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed-300x129.png 300w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed-768x329.png 768w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_acc_airspeed.png 1458w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/a><\/p>\n<p>Amongst other data, we were especially interested in the measured evolution of the pressure, measured by a commercial barometer. In the following diagram, the measured pressure is shown besides the estimated airspeed.<\/p>\n<p><a href=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3871 size-large\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach-1024x439.png\" width=\"940\" height=\"403\" srcset=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach-1024x439.png 1024w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach-300x129.png 300w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach-768x329.png 768w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_pressure_mach.png 1458w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/a><\/p>\n<p>A pressure drop is clearly visible while\u00a0approaching and exiting the transonic region. Nevertheless, the apogee-detection of our boardcomputer was capable of determining the apogee perfectly and the rocket was recovered smoothly: A reefed parachute was deployed by a blackpowder charge at apogee, while the main parachute was released by the\u00a0<a href=\"https:\/\/www.jollylogic.com\/products\/chuterelease\/\">ChuteRelease<\/a>\u00a0at a save height. The reduced descent velocity on the main parachute can be seen in the following diagram.<\/p>\n<p><a href=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-3924\" src=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach-1024x439.jpg\" alt=\"str06_k1100_height_mach\" width=\"1024\" height=\"439\" srcset=\"https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach-1024x439.jpg 1024w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach-300x129.jpg 300w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach-768x329.jpg 768w, https:\/\/wptest3.tust.at\/wp-content\/uploads\/2016\/09\/STR06_K1100_height_mach.jpg 1458w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>After waiting a long time we did it finally: The first supersonic flight of a rocket of the TU Wien Space Team was performed successfully. [table id=9 \/] With a maximum acceleration beyond 30g, comparable to\u00a0The Hound, the rocket was accelerated to a velocity of 390 m\/s within 1.4 seconds. The real airspeed could only&hellip;&nbsp;<a href=\"https:\/\/wptest3.tust.at\/index.php\/2016\/09\/19\/from-0-to-1200-kmh-within-one-second-supersonic\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">From 0 to 1200 km\/h within one second: Supersonic!<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":3800,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[31,39],"tags":[],"class_list":["post-3912","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","category-rockets-en"],"_links":{"self":[{"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/posts\/3912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/comments?post=3912"}],"version-history":[{"count":0,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/posts\/3912\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/media\/3800"}],"wp:attachment":[{"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/media?parent=3912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/categories?post=3912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wptest3.tust.at\/index.php\/wp-json\/wp\/v2\/tags?post=3912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}