{"id":15447,"date":"2016-06-15T00:37:23","date_gmt":"2016-06-14T16:37:23","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/cygnus-leaves-space-station-and-conducts-nasa-fire-experiment-in-microgravity\/"},"modified":"2016-06-15T00:37:23","modified_gmt":"2016-06-14T16:37:23","slug":"cygnus-leaves-space-station-and-conducts-nasa-fire-experiment-in-microgravity","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/cygnus-leaves-space-station-and-conducts-nasa-fire-experiment-in-microgravity\/","title":{"rendered":"Cygnus leaves space station and conducts NASA fire experiment in microgravity"},"content":{"rendered":"<p><iframe loading=\"lazy\" src=\"https:\/\/player.vimeo.com\/video\/170629488\" width=\"640\" height=\"360\" frameborder=\"0\" webkitallowfullscreen=\"\" mozallowfullscreen=\"\" allowfullscreen=\"\"><\/iframe><\/p>\n<p>CAPE CANAVERAL \u2014 Bidding farewell to the International Space Station today, the commercial Cygnus cargo ship separated to a safe distance before igniting an intentional fire in microgravity like never before, all in the name of science.<\/p>\n<p>The NASA-sponsored Spacecraft Fire Experiment, or SAFFIRE, was conducted to better understand how flames will behave in weightlessness and improve fire safety techniques for future spacecraft.<\/p>\n<p>The first bit of video of today\u2019s fire is expected to be released no earlier than tomorrow.<\/p>\n<p>Scientists have lacked the ability to study large-scale fires in space because of the inherent danger to astronauts and the spacecraft. But Cygnus offers an ideal research platform for the first time, serving as a man-rated craft for the experiment at the end of its mission before deorbiting to burn up in the atmosphere.<\/p>\n<p>The Orbital ATK-owned freighter reached orbit March 22 atop a United Launch Alliance Atlas 5 rocket from Cape Canaveral and successfully delivered over 7,000 pounds of supplies, provisions and equipment to the station. <\/p>\n<p>It was filled with 4,087 pounds of trash and disposables \u2014 broken hardware, dirty laundry, empty food containers \u2014 before the astronauts closed the hatch for today\u2019s unberthing. <\/p>\n<p>The station\u2019s Canadian robotic arm, operated remotely by Mission Control, detached the Cygnus from the Unity module at 7:43 a.m. EDT (1143 GMT) and deftly maneuvered it under the outpost to the prescribed departure box.<\/p>\n<p>At 9:30 a.m. EDT (1330 GMT), Expedition 47 commander Tim Kopra of NASA released the vessel 254 miles above Paraguay to fly away on its own, completing 80 days berthed at the International Space Station.<\/p>\n<figure id=\"attachment_16003\" aria-describedby=\"caption-attachment-16003\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/peake-Ck6yYUYWsAAGWrb.jpg-large-1024x683.jpeg\" alt=\"A picture of Cygnus taken this morning. Credit: Astronaut Tim Peake\" width=\"1024\" height=\"683\" class=\"size-large wp-image-16003\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/peake-Ck6yYUYWsAAGWrb.jpg-large-1024x683.jpeg 1024w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/peake-Ck6yYUYWsAAGWrb.jpg-large-300x200.jpeg 300w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/peake-Ck6yYUYWsAAGWrb.jpg-large-768x512.jpeg 768w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/peake-Ck6yYUYWsAAGWrb.jpg-large.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption id=\"caption-attachment-16003\" class=\"wp-caption-text\">A picture of Cygnus taken this morning. Credit: Astronaut Tim Peake<\/figcaption><\/figure>\n<p>Kopra congratulated the Orbital ATK team for a \u201cvery successful mission of the S.S. Rick Husband.\u201d<\/p>\n<p>\u201cWe\u2019re very grateful we\u2019ve had the supplies and the science to sustain our mission here on the International Space Station,\u201d he said.<\/p>\n<p>Several hours after departure and with a large distance between Cygnus and the station, controllers at Orbital ATK facilities in Dulles, Virginia, sent commands to start the SAFFIRE experiment.<\/p>\n<p>A hot wire along the upstream edge of the fiberglass-cotton fabric material sample triggered the fire. The sample measured 15.7 inches wide by 37 inches tall.<\/p>\n<p>\u201cThe SAFFIRE experiment, designed to understand fire in microgravity, is now burning successfully,\u201d NASA\u2019s Glenn Research Center tweeted at 4:54 p.m. EDT (2054 GMT).<\/p>\n<p>\u201cOur SAFFIRE experiment traveled 1,000 miles in space while burning on Cygnus,\u201d was tweeted at 5:28 p.m. EDT (2128 GMT).<\/p>\n<p>\u201cThe purpose for SAFFIRE is to address fire safety on exploration vehicles and habitats,\u201d said Gary Ruff, project manager and co-investigator for SAFFIRE at NASA-Glenn in Cleveland.<\/p>\n<p>\u201cThe specific goals of the SAFFIRE experiments are to investigate the spread of a large-scale fire in microgravity, essentially trying to answer the questions of how large does a fire get and how rapidly does it spread, or how long does it take to get to the point of being really hazardous to the crew?\u201d<\/p>\n<figure id=\"attachment_16006\" aria-describedby=\"caption-attachment-16006\" style=\"width: 755px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire2.png\" alt=\"The SAFFIRE experiment. Credit: NASA\" width=\"755\" height=\"678\" class=\"size-full wp-image-16006\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire2.png 755w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire2-300x269.png 300w\" sizes=\"(max-width: 755px) 100vw, 755px\"><figcaption id=\"caption-attachment-16006\" class=\"wp-caption-text\">The SAFFIRE experiment. Credit: NASA<\/figcaption><\/figure>\n<p>The flames were contained within an instrumented research box \u2014 measuring 35 by 52 inches (3 by 4.4 feet) \u2014 that was strapped into the commercial vehicle before launch and never touched during its stay at the space station.<\/p>\n<p>\u201cOn Earth all inhabited structures \u2014 be it a building, airplane, ship or a car \u2014 we\u2019ve done full-scale testing of fires and how it grows. So we have an understanding of how to build vehicles and structures and how to defend against fires,\u201d said David Urban, SAFFIRE\u2019s principal investigator.<\/p>\n<p>\u201cIn spacecraft, we\u2019ve never had the opportunity to burn anything larger than approximately an index card\u2026We really don\u2019t know what the fate of a fire is. So our building of future spacecraft is based on one-G understanding and extrapolation of very small, short-duration experiments.\u201d<\/p>\n<p>NASA intends to launch SAFFIRE experiments twice more this year. The SAFFIRE 1 and 3 tests use single samples 15.7 inches wide by 37 inches tall to watch the development and spread of a large-scale low-gravity fire. Scientists want to know if there is a limiting flame size and to quantify the size and growth rate of flames over large surfaces.<\/p>\n<p>On SAFFIRE 2 later this summer, nine smaller samples, each measuring 2 inches wide by 10 inches long, will be burned sequentially to investigate the in-space \u201cmaximum oxygen concentration\u201d flammability limits to determine if the flame propagates or self-extinguishes.<\/p>\n<p>\u201cSAFFIRE is a box with a wind tunnel in it, a flow duct, that contains the sample that will be burned,\u201d said Ruff.<\/p>\n<p>Prior space combustion experiments have been limited to samples no larger than 4 inches in length and width.<\/p>\n<p>Two cameras were positioned to capture the fire. Other instruments measured oxygen, carbon dioxide, heat, pressure and flame growth. <\/p>\n<figure id=\"attachment_16005\" aria-describedby=\"caption-attachment-16005\" style=\"width: 774px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire1.png\" alt=\"The SAFFIRE mission logo. Credit: NASA\" width=\"774\" height=\"774\" class=\"size-full wp-image-16005\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire1.png 774w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire1-150x150.png 150w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire1-300x300.png 300w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2016\/06\/Saffire1-768x768.png 768w\" sizes=\"auto, (max-width: 774px) 100vw, 774px\"><figcaption id=\"caption-attachment-16005\" class=\"wp-caption-text\">The SAFFIRE mission logo. Credit: NASA<\/figcaption><\/figure>\n<p>Cygnus will remain in orbit for 8 days to downlink all the SAFFIRE data to the ground. A NASA spokesman said  the transmissions will begin at around 8 p.m. EDT (0000 GMT) tonight.<\/p>\n<p>\u201cCygnus had a successful, two-and-a-half-month stay at the International Space Station, delivering vital cargo to the astronauts,\u201d said Frank Culbertson, president of Orbital ATK\u2019s Space Systems Group.<\/p>\n<p>\u201cNow, the work continues as we demonstrate expanded capabilities for Cygnus beyond its core cargo delivery function. The next phase of this mission marks the first time that Cygnus will serve as a research platform to support science experiments that enable deep space exploration. Our ability to conduct these tests further highlights the versatility and flexibility that Cygnus offers to our customers.\u201d<\/p>\n<p>On Monday, June 20, five LEMUR cubesats will be launched from from an external deployer on Cygnus for a remote sensing satellite constellation to provide global ship tracking and weather monitoring. <\/p>\n<p>The craft will execute its deorbit engine firing June 22 at 8:45 a.m. EDT (1245 GMT) for a harmless disposal over the South Pacific. It will hit the atmosphere at 9:05 a.m. and any surviving debris will impact the water by 9:35 a.m. EDT.<\/p>\n<p>During the plunge into the atmosphere, one final experiment will be conducted, called the Re-entry Breakup Recorder.<\/p>\n<p>Sensors will monitor pressures, temperatures and accelerations as the spacecraft disintegrates. That data will be transmitted to scientists via a commercial Iridium satellite telephone link.<\/p>\n<p>This was the fourth operational Cygnus mission to reach the station, the second launched by the Atlas 5 rocket in a 100-day span that delivered over 15,000 pounds of supplies.<\/p>\n<p>The next Cygnus cargo mission to the station will launch this summer atop the redesigned Antares rocket from Wallops Island, Virginia.<\/p>\n<p>See earlier Cygnus OA-6 coverage.<\/p>\n<p>Our Atlas archive.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CAPE CANAVERAL \u2014 Bidding farewell to the International Space Station today, the commercial Cygnus cargo ship separated to a safe distance before igniting an intentional fire in microgravity like never before, all in the name of science. The NASA-sponsored Spacecraft Fire Experiment, or SAFFIRE, was conducted to better understand how flames will behave in weightlessness [&hellip;]<\/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":[3684,1328,286,2304,639,3678,717,3672],"class_list":["post-15447","post","type-post","status-publish","format-standard","hentry","category-news","tag-av-064","tag-canadarm2","tag-cargo","tag-crs","tag-cygnus","tag-expedition-47","tag-international-space-station","tag-oa-6"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/15447"}],"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=15447"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/15447\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=15447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=15447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=15447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}