{"id":547575,"date":"2023-10-12T16:44:39","date_gmt":"2023-10-12T20:44:39","guid":{"rendered":"https:\/\/www.nasa.gov\/?post_type=topic&p=547575"},"modified":"2024-01-11T10:22:36","modified_gmt":"2024-01-11T15:22:36","slug":"propellant-transfer-technologies","status":"publish","type":"topic","link":"https:\/\/www.nasa.gov\/nexis\/propellant-transfer-technologies\/","title":{"rendered":"Propellant Transfer Technologies"},"content":{"rendered":"<div id=\"\" class=\" hds-module hds-module-full wp-block-nasa-blocks-secondary-navigation\"><div class=\"hds-secondary-navigation-wrapper z-top width-100 padding-0\"><div id=\"\" class=\"hds-secondary-navigation width-full border-bottom-1px text-center hds-color-mode-dark hds-module hds-module-full wp-block-nasa-blocks-hdsnav\"><button type=\"button\" class=\"hds-secondary-nav-mobile-button display-flex tablet:display-flex desktop:display-none width-full flex-align-center bg-carbon-90 border-color-carbon-80 color-spacesuit-white\" aria-expanded=\"false\" aria-controls=\"hds-secondary-nav-track\"><span>NEXIS<\/span><svg width=\"16\" height=\"16\" alt=\"\" enable-background=\"new 0 0 400 400\" viewBox=\"0 0 400 400\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m4.2 122.2 195.1 195.1 196.5-196.6-37.9-38-157.8 157.8-156.8-156.8z\" \/><\/svg><\/button><div class=\"hds-secondary-nav-track grid-container grid-container-extrawide padding-0 tablet:padding-x-3 desktop:padding-x-2 \"><div class=\"hds-secondary-navigation-menu-items\"><nav><ul class=\"usa-nav__primary usa-accordion flex-justify-center margin-0\"><li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/www.nasa.gov\/nexis\/\">NExIS Home<\/a><\/li><li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/www.nasa.gov\/nexis\/about-nexis\/\">About<\/a><\/li><li class=\"usa-nav__primary-item \"><a class=\"usa-nav__link\" href=\"https:\/\/www.nasa.gov\/nexis\/NEXIS-resources\/\">Resources<\/a><\/li><li class=\"usa-nav__primary-item\"><button type=\"button\" class=\"usa-accordion__button usa-nav__link\" aria-expanded=\"false\" aria-controls=\"basic-nav-section-one\"><span>Missions & Servicing Technologies<\/span><svg class=\"hds-desktop-submenu-toggle-icon display-none tablet:display-none desktop:display-block\" width=\"16\" height=\"16\" alt=\"\" enable-background=\"new 0 0 400 400\" viewBox=\"0 0 400 400\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m4.2 122.2 195.1 195.1 196.5-196.6-37.9-38-157.8 157.8-156.8-156.8z\" \/><\/svg><svg class=\"hds-mobile-submenu-toggle-icon display-block tablet:display-block desktop:display-none\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"8\" cy=\"8\" r=\"7.5\" fill=\"#0B3D91\" stroke=\"white\"\/><rect x=\"4\" y=\"7.6001\" width=\"8\" height=\"0.8\" fill=\"white\"\/><rect class=\"hds-mobile-submenu-toggle-icon-line-vertical\" x=\"7.59998\" y=\"12\" width=\"8\" height=\"0.8\" transform=\"rotate(-90 7.59998 12)\" fill=\"white\"\/><\/svg><\/button><ul id=\"basic-nav-section-one\" class=\"usa-nav__submenu\" hidden><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/technology.nasa.gov\/satellite-servicing\" rel=\"noopener\">Patented Technologies<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/isam\/\">In-Space Servicing, Assembly<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/mission\/on-orbit-servicing-assembly-and-manufacturing-1\/\">OSAM-1 Mission<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/relative-navigation-system\/\">Relative Navigation System<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/robotic-servicing-arm\/\">Robotic Servicing Arm<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/propellant-transfer-technologies\/\">Propellant Transfer Technologies<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/robotic-refueling-mission-3\/\">Robotic Refueling Mission 3<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/rrm-1-2\/\">RRM: Phase 1&2<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/nasa.gov\/nexis\/raven\/\" rel=\"noopener\">Raven<\/a><\/li><li class=\"usa-nav__submenu-item \"><a class=\"usa-nav__link\" target=\"_self\" href=\"https:\/\/www.nasa.gov\/nexis\/robotic-external-leak-locator\/\">Robotic External Leak Locator<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div><\/div><\/div><\/div><\/div>\n\n<div id=\"\" class=\"hds-topic-hero position-relative bg-carbon-black overflow-hidden width-full maxw-full grid-container display-flex flex-align-center flex-justify-center minh-tablet padding-y-9 padding-x-3 color-mode-dark hds-module hds-module-full wp-block-nasa-blocks-topic-hero\"><figure class=\"hds-media-background  \"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?w=800\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"Tests in microgravity\" style=\"transform: scale(1); transform-origin: 72% 88%; object-position: 72% 88%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg 800w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=300,225 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=768,576 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=400,300 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=600,450 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" loading=\"eager\" \/><\/figure><div class=\"skrim-overlay skrim-left mobile-skrim-top\"><\/div>\n\t<div class=\"hds-grid-container position-relative display-flex flex-align-center flex-justify-start width-full\">\n\t\t<div class=\"width-full maxw-tablet\">\n\t\t\t<div class=\"margin-bottom-7\">\n\t\t\t\t<h1 class=\"display-72 font-weight-extrabold line-height-sm margin-bottom-2 color-spacesuit-white-important\">Propellant Transfer Technologies<\/h1>\n\t\t\t\t<p class=\"p-lg margin-0 color-spacesuit-white-important\"><\/p>\n\t\t\t<\/div>\n\t\t\t<div class=\"hds-topic-hero-stats\">\n\t\t\t\t<h2 class=\"color-spacesuit-white-important label margin-bottom-2\"><\/h2>\n\t\t\t\t<div class=\"grid-row\">\n\t\t\t\t\t<div class=\"grid-col grid-row flex-align-center padding-right-2 desktop:padding-right-4\">\n\t\t\t\t\t\t<div class=\"grid-col grid-col-auto\">\n\t\t\t\t\t\t\t<div class=\"stat-number line-height-sm color-nasa-blue-tint font-weight-thin font-mono-2xl\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"color-spacesuit-white-important grid-col padding-left-2 tablet:padding-left-3\">\n\t\t\t\t\t\t\t<h4 class=\"stat-value line-height-md\"><\/h4>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"grid-col grid-row flex-align-center padding-right-2  desktop:padding-right-4\">\n\t\t\t\t\t\t<div class=\"grid-col grid-col-auto\">\n\t\t\t\t\t\t\t<div class=\"stat-number line-height-sm color-nasa-blue-tint font-weight-thin font-mono-2xl\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"color-spacesuit-white-important grid-col padding-left-2 tablet:padding-left-3 tablet:padding-left-3\">\n\t\t\t\t\t\t\t<h4 class=\"stat-value line-height-md\"><\/h4>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div><\/div>\n\n\n<h1 class=\"wp-block-heading\">Robotically refueling a satellite in space: Easy or Hard?<\/h1>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Millions of cars are refueled each day. How difficult could it be for a robot to fill up a satellite?<\/h3>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>The truth is, it’s extremely hard. The challenges are stacked as the robot has to deal with uncooperative, triple sealed fuel caps, floating hoses, and extremely corrosive satellite fuel contained under intense pressures\u2014all handled in the weightlessness of space. Not to mention that the robot servicer and the client are both 22,000 miles above our heads\u2014far away from their human operators.<\/p>\n\n\n\n<p>The solution? A comprehensive suite of new robotic technologies and procedures to overcome each obstacle. The team at Goddard is working with Kennedy Space Center as an integrated team to develop, test and build a flexible hose, new fueling tools, and propellant transfer system that meet mission requirements.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">Demonstrating Robotic Refueling Capabilities On Orbit<\/h1>\n\n\n\n<p>The <a href=\"https:\/\/www.nasa.gov\/nexis\/rrm-1-2\/\">Robotic Refueling Mission, RRM<\/a> showed in January 2013 that remotely controlled robots can work through the caps and wires on a satellite fuel valve and transfer fluid into existent, orbiting spacecraft that were not designed to be serviced. RRM was the important first step\u2014but doing more was always part of the long-term plan.<\/p>\n\n\n<div id=\"\" class=\"hds-media hds-module wp-block-image\"><div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\"><div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><a href=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"300\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg?w=600\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"An industrial robot at Kennedy Space Center tests propellant transfer technologies during RROxiTT\" style=\"transform: scale(1); transform-origin: 44% 15%; object-position: 44% 15%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg?resize=300,150 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg?resize=400,200 400w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">An industrial robot at Kennedy Space Center tests propellant transfer technologies during RROxiTT<\/div><div class=\"hds-credits\">NASA<\/div><\/figcaption><\/div><\/div><\/div>\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">The Remote Robotic Oxidizer Transfer Test  (RROxiTT)<\/h1>\n\n\n\n<p>To meet safety regulations on space station, RRM transferred liquid ethanol – a safe substitute for satellite fuel. One year later in February 2014, a new set of advanced technologies were tested with real satellite propellant. They’re doing this via RROxiTT: the Remote Robotic Oxidizer Transfer Test.<\/p>\n\n\n\n<p>RROxiTT is a multi-Center, remotely controlled test of new technologies that would empower future space robots to transfer hazardous and corrosive satellite oxidizer into the propellant tanks of spacecraft in space today. The test is being conducted on the ground at both NASA Goddard Space Flight Center and Kennedy Space Center. To simulate mission conditions, the oxidizer is being transferred at flight-like pressures and flow rates.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">What Comes Next?<\/h1>\n\n\n\n<p>Here on earth, RROxiTT technologies could one day be applied to robotically fill up satellites before they launch, keeping humans at a safe distance during an extremely hazardous operation.<\/p>\n\n\n\n<p>By executing RROxiTT, invaluable data is gained about the performance of their new propellant transfer technologies and the telerobotic operational procedures developed to date. Results will help the team to resolve discovered anomalies and advance the system in preparation for flight.<\/p>\n\n\n\n<p>With RROxiTT off their checklist, the team focuses on advancing additional technologies to transfer other hazardous propellants commonly used by satellites, such as Xenon used in solar electric propulsion systems.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">Running a Robot Long Distance<\/h1>\n\n\n\n<p><\/p>\n\n\n\n<p>When RRM operated on the International Space Station, the Dextre robot’s human controllers were on the ground at Johnson Space Center.<\/p>\n\n\n\n<p>When Alex Janas, lead roboticist for the RROxiTT demonstration, steps up to his console at Goddard in Maryland to drive the RROxiTT robot, he is not going to have a robot, tool or a propellant pump in sight. Every other piece of hardware for the test is located about 800 miles away at the Payload Hazardous Servicing Facility at KSC in Florida. With the cameras on the robot to guide him and supported by innovative software, Janas is using a joystick and keyboard to connect the robot’s tool to the satellite valve so the oxidizer transfer can take place.<\/p>\n\n\n\n<p>Why does the team test hardware and procedures this way? Because it mimics what they would encounter during a real robotic servicing in space. The robotic operator would be on the ground, far away from the client that his or her robot is servicing.<\/p>\n\n\n<div id=\"\" class=\"hds-media hds-module wp-block-image\"><div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\"><div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"377\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?w=1280\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"From his control center at NASA Goddard, RROxiTT lead roboticist Alex Janas commands an industrial robot approximately 800 miles away at Kennedy Space Center.\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg 1280w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=300,88 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=768,226 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=1024,302 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=400,118 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=600,177 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=900,265 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-janas-3.jpg?resize=1200,353 1200w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">From his control center at NASA Goddard, RROxiTT lead roboticist Alex Janas commands an industrial robot approximately 800 miles away at Kennedy Space Center.<\/div><div class=\"hds-credits\"><br><\/div><\/figcaption><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">Propellant Transfer Technology Suite<\/h2>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Propellant Transfer System (PTS)<\/h4>\n\n\n\n<p>Consisting of oxidizer tanks, seal-less pumps, flow-metering devices, and a maze of tubing , the PTS contains the technologies a servicer satellite would need to replenish the propellant of orbiting spacecraft for many years and many missions.<\/p>\n\n\n\n<p>It also contains an adjustable, deployable-length hose delivery system. Roughly the size of a roll of quarters, the PTS pump is designed to deliver the oxidizer at high pressure and at flow rates required for bubble-free formation in the individual client tank \u2014 an extremely important factor for client propulsion system performance. The system uses very little power, a precious commodity in space flight. An innovative metering system ensures that the PTS dispenses hypergolic propellants in accurate and precise amounts.<\/p>\n\n\n\n<p>What exactly are hypergolics? “Hypergolic propellants are fuels and oxidizers which ignite on contact with each other and need no ignition source.”<\/p>\n\n\n\n<p>This system was <a href=\"https:\/\/www.nasa.gov\/content\/testing-continues-for-satellite-servicing-capabilities\/#.Uvow3yRkJTr\">developed and tested with hypergolics <\/a>by Kennedy Space Center team members.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Flexible Fuel Hose<\/h4>\n\n\n\n<p>The hose is the essential link between the Propellant Transfer System and the Oxidizer Nozzle Tool during transfer. Developed by Kennedy Space Center, the device is flexible enough to be robotically maneuvered, yet tough enough to handle corrosive satellite propellant at flight pressures. It has a multi-layered wrapping and a suite of heaters to ensure that the propellant and Hose components work properly in the harsh environment of space.<\/p>\n\n\n<div id=\"\" class=\"hds-image-carousel grid-container grid-container-block padding-top-8 padding-bottom-8 hds-module hds-module-full wp-block-nasa-blocks-image-carousel\">\t\t<div class=\"hds-carousel-wrapper\">\n\t\t\t<div class=\"image-carousel-slider margin-0\" id=\"image-carousel-slider\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"display-block width-full\">\n\t\t\t\t\t\t\t<figure class=\"margin-0\">\n\t\t\t\t\t\t\t\t<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n\t\t\t\t\t\t\t\t<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg?w=800\" class=\"attachment-large size-large\" alt=\"Dr. Edward Cheung, lead electrical engineer\" style=\"transform: scale(1); transform-origin: 35% 35%; object-position: 35% 35%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg 800w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg?resize=300,225 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg?resize=768,576 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg?resize=400,300 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity3.jpg?resize=600,450 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">05.24.2013 – Dr. Edward Cheung, lead electrical engineer of NASA’s Satellite Servicing Projects Division, looks on as data transfers from the flexible satellite refueling hose to his computer. Sensors on the hose will help Dr. Cheung and his team track the device’s movements during June 2013 zero-gravity testing funded by NASA’s Flight Opportunities Program.<\/div><div class=\"hds-credits\">NASA<\/div><\/figcaption><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"display-block width-full\">\n\t\t\t\t\t\t\t<figure class=\"margin-0\">\n\t\t\t\t\t\t\t\t<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n\t\t\t\t\t\t\t\t<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?w=800\" class=\"attachment-large size-large\" alt=\"Testing on a zero-gravity airplane\" style=\"transform: scale(1.02); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg 800w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=300,225 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=768,576 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=400,300 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/zerogravity-4.jpg?resize=600,450 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">Jun 4, 2013 – Two assistants help during flexible host testing conducted June 4-6, 2013 on a zero-gravity airplane. Data collected during the series of 20-second tests in microgravity helps design a host that is maneuverable yet strong enough to transfer corrosive satellite fuel on orbit.<\/div><div class=\"hds-credits\">NASA<\/div><\/figcaption><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"display-block width-full\">\n\t\t\t\t\t\t\t<figure class=\"margin-0\">\n\t\t\t\t\t\t\t\t<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n\t\t\t\t\t\t\t\t<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\"><figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?w=768\" class=\"attachment-large size-large\" alt=\"\" style=\"transform: scale(1); transform-origin: 55% 20%; object-position: 55% 20%; object-fit: cover;\" block_context=\"nasa-block\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg 2736w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=225,300 225w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=768,1024 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=1152,1536 1152w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=1536,2048 1536w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=300,400 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=450,600 450w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=675,900 675w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=900,1200 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/img-2258.jpg?resize=1500,2000 1500w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure><figcaption class=\"hds-caption padding-y-2\"><div class=\"hds-caption-text p-sm margin-0\">Feb. 8, 2014 – Team members took a swim the first week of February 2013 at the University of Maryland’s Neutral Buoyancy Research Facility to study the behavior of a flexible hose in a watery environment – a state that closely mimics the zero-gravity dynamics of space. Data gathered from this engineering evaluation helps shape designs for a unique hose that could be used to transfer fuel to a satellite in space.<\/div><div class=\"hds-credits\">NASA<\/div><\/figcaption><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<div class=\"hds-carousel-nav display-flex margin-left-auto margin-right-0\">\n\t\t\t\t<button class=\"hds-carousel-nav-arrow hds-carousel-arrow-prev\">\n\t\t\t\t\t<svg version=\"1.1\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewBox=\"0 0 9 9\"><path class=\"st0\" d=\"M3.5,4.5l3.7-3.6L6.3,0L1.8,4.5L6.3,9l0.9-0.9L3.5,4.5z\"><\/path><\/svg>\n\t\t\t\t<\/button>\n\t\t\t\t<button class=\"hds-carousel-nav-arrow hds-carousel-arrow-next margin-right-0\">\n\t\t\t\t\t<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewBox=\"0 0 9 9\"><path class=\"st0\" d=\"M5.5,4.5L1.8,8.1L2.7,9l4.5-4.5L2.7,0L1.8,0.9L5.5,4.5z\"><\/path><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\n\n<h4 class=\"wp-block-heading\">Oxidizer Nozzle Tool (ONT)<\/h4>\n\n\n\n<p>Designed by the same team that built the tools for the <a href=\"https:\/\/vimeo.com\/1605022\" rel=\"noopener\">Hubble Space Telescope Servicing Missions<\/a> and the Robotic Refueling Mission, the Oxidizer Nozzle Tool is built to connect to – and seal against – a satellite valve that wasn’t originally designed to be accessed on orbit.<\/p>\n\n\n\n<p>The ONT uses a Quick Disconnect adapter to seal to the satellite valve and operate the valve to permit propellant transfer. Once the Tool is in place and the satellite valve is open, the Propellant Transfer system kicks into gear to transfer the oxidizer through the valve. The ONT draws from lessons the team learned building and testing the Robotic Refueling Mission Nozzle Tool.<\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">What makes oxidizer so dangerous?<\/h5>\n\n\n\n<p>Oxidizer — namely nitrogen tetroxide — is a chemical that, when mixed with satellite fuel, causes instant combustion that provides thrust (motion) for a satellite. Oxidizer is contained within a satellite tank at intense pressures, up to 300 pounds per square inch (about 20 times atmospheric pressure). Toxic, extremely corrosive and compressed, it requires special handling and a unique set of technologies to transfer it.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"NASA | Teaming Up to Test the Future of Satellite Refueling\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/CSErB9H5-qY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"RRM Refueling: Disconnecting After Fluid Transfer\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/66CQgdivWAw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Robotically refueling a satellite in space: Easy or Hard? Millions of cars are refueled each day. How difficult could it be for a robot to fill up a satellite? The truth is, it’s extremely hard. The challenges are stacked as the robot has to deal with uncooperative, triple sealed fuel caps, floating hoses, and extremely [...]<\/p>\n","protected":false},"author":167,"featured_media":547658,"parent":543255,"menu_order":0,"template":"","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[]},"categories":[],"news-tags":[],"internal-terms":[],"coauthors":[10404],"parsely":{"version":"1.1.0","meta":{"@context":"https:\/\/schema.org","@type":"WebPage","headline":"Propellant Transfer Technologies","url":"https:\/\/www.nasa.gov\/nexis\/propellant-transfer-technologies\/","mainEntityOfPage":{"@type":"WebPage","@id":"https:\/\/www.nasa.gov\/nexis\/propellant-transfer-technologies\/"},"thumbnailUrl":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg?w=150&h=150&crop=1","image":{"@type":"ImageObject","url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg"},"articleSection":"General","author":[{"@type":"Person","name":"Jennifer M. Brill"}],"creator":["Jennifer M. Brill"],"publisher":{"@type":"Organization","name":"NASA","logo":"https:\/\/www.nasa.gov\/wp-content\/themes\/nasa\/assets\/images\/nasa-logo.svg"},"keywords":[],"dateCreated":"2023-10-12T20:44:39Z","datePublished":"2023-10-12T20:44:39Z","dateModified":"2024-01-11T15:22:36Z"},"rendered":"<meta name=\"parsely-title\" content=\"Propellant Transfer Technologies\" \/>\n<meta name=\"parsely-link\" content=\"https:\/\/www.nasa.gov\/nexis\/propellant-transfer-technologies\/\" \/>\n<meta name=\"parsely-type\" content=\"index\" \/>\n<meta name=\"parsely-image-url\" content=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg?w=150&h=150&crop=1\" \/>\n<meta name=\"parsely-pub-date\" content=\"2023-10-12T20:44:39Z\" \/>\n<meta name=\"parsely-section\" content=\"General\" \/>\n<meta name=\"parsely-author\" content=\"Jennifer M. Brill\" \/>","tracker_url":"https:\/\/cdn.parsely.com\/keys\/nasa.gov\/p.js"},"read_time":6,"time_ago":"8 months","featured_image":{"id":547658,"file":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/10\/nasa-rroxitt-test.jpg","title":"nasa-rroxitt-test","alt":"An industrial robot at Kennedy Space Center tests propellant transfer technologies during RROxiTT","caption":"An industrial robot at Kennedy Space Center tests propellant transfer technologies during RROxiTT"},"_links":{"self":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/topic\/547575"}],"collection":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/types\/topic"}],"author":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/users\/167"}],"version-history":[{"count":6,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/topic\/547575\/revisions"}],"predecessor-version":[{"id":592176,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/topic\/547575\/revisions\/592176"}],"up":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/topic\/543255"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media\/547658"}],"wp:attachment":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media?parent=547575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/categories?post=547575"},{"taxonomy":"news-tags","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/news-tags?post=547575"},{"taxonomy":"internal-terms","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/internal-terms?post=547575"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/coauthors?post=547575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}