{"id":6246,"date":"2012-07-13T10:49:36","date_gmt":"2012-07-13T17:49:36","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=6246"},"modified":"2012-07-13T10:49:36","modified_gmt":"2012-07-13T17:49:36","slug":"keeping-a-uav-aloft-for-48-hours-%e2%80%93-on-laser-power","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/keeping-a-uav-aloft-for-48-hours-%e2%80%93-on-laser-power\/","title":{"rendered":"Keeping a UAV Aloft for 48 Hours \u2013 On Laser Power"},"content":{"rendered":"<p><a href=\"http:\/\/www.lockheedmartin.com\/\">Lockheed Martin<\/a> and <a href=\"http:\/\/lasermotive.com\/\">LaserMotive<\/a>\u00a0recently managed to keep a drone, the Stalker Unmanned Aerial System (UAS), flying for 48 hours on a laser-guided recharging system.\u00a0 Its on-board batteries can maintain flight for two hours, so the demonstration improves endurance by 2,400 percent.<\/p>\n<p>Your editor admits to possibly over-healthy skepticism regarding transmittal of power to aircraft, remembering early NASA demonstrations that were noisy and more lightning-like than focused.\u00a0 LaserMotive\u2019s technology seems to overcome these objections.<\/p>\n<p><iframe loading=\"lazy\" title=\"LaserMotive - Who We Are, and What is Power Beaming\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/-9ukRpvolYg?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><\/p>\n<p>Stalker is described by Lockheed-Martin as \u201ca small, silent UAS used by Special Operations Forces since 2006 to perform intelligence, surveillance and reconnaissance missions.\u201d \u00a0The miniature plane \u00a0weighs a little over six kilograms (13.2 pounds) and has a wing span of three meters (9.84 feet).\u00a0 As shown in the video, it can be hand-launched by a single soldier or enforcement office and fly for up \u00a0to two hours at up to 4600 meters above the ground. \u00a0In this video, narrated by that guy who\u2019s heard in every movie preview, it\u2019s shown performing a possible drug interdiction or contraband mission.<\/p>\n<p><iframe loading=\"lazy\" title=\"Skunk Works &quot;Stalker&quot; UAV\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/cNymMcD1A-0?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><\/p>\n<p>Unlike the video, the Stalker flew indoors \u201cin a wind tunnel,\u201d with the LaserMotive system wirelessly transferring energy to the aircraft.\u00a0 At the end of the test, the aircraft had more energy stored than it did at the beginning of the test.\u00a0 According to Tom Nugent, LaserMotive\u2019s president, &#8220;This test is one of the final steps in bringing laser-powered flight to the field.\u00a0 By enabling in-flight recharging, this system will ultimately extend capabilities, improve endurance and enable new missions for electric aircraft. The next step in proving the reality of this technology is to demonstrate it outdoors in an extended flight of the Stalker.&#8221;<\/p>\n<p>Tom Koonce, Lockheed Martin Skunk Works\u00ae Stalker program manager, added, \u201cWe\u2019re pleased with the results of this test. Laser power holds real promise in extending the capabilities of Stalker. A ground-to-air recharging system like this allows us to provide practically unlimited flight endurance to extend and expand the mission profiles that the Stalker vehicle can fulfill.\u201d<\/p>\n<p>The Stalker had earlier been <a href=\"http:\/\/www.unmannedvehicles.co.uk\/uav-news\/darpa-hybrid-fuel-cell-for-small-unmanned-vehicles-quadruples-endurance\/\">outfitted with a fuel cell <\/a>that allowed eight hour flights to quadruple its normal flight time, combined with \u201ca conventional lithium polymer battery to handle peak power requirements, [using] its high energy density hydrocarbon fuel to handle energy storage rather than a relatively low energy density battery.\u201d<\/p>\n<div id=\"attachment_6249\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/cafe.foundation\/blog\/?attachment_id=6249\" rel=\"attachment wp-att-6249\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6249\" class=\"size-large wp-image-6249\" title=\"laser-power-stalker-uas-1\" src=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2012\/07\/laser-power-stalker-uas-1-528x365.jpg\" alt=\"\" width=\"528\" height=\"365\" srcset=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2012\/07\/laser-power-stalker-uas-1-528x365.jpg 528w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2012\/07\/laser-power-stalker-uas-1-300x207.jpg 300w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2012\/07\/laser-power-stalker-uas-1.jpg 529w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><\/a><p id=\"caption-attachment-6249\" class=\"wp-caption-text\">Laser-powered Stalker on tactical mission to find tanks<\/p><\/div>\n<p>How these indoor tests will translate to a real-world environment will be interesting, since the fuel-cell powered version encountered sustained winds of 28 mph and gusts of 46 mph.\u00a0 Tracking and targeting the small receiver on a craft being buffeted in the air will notch the level of difficulty up significantly.<\/p>\n<p>With on-board batteries or fuel cells and intermittent charging passes, an aircraft could pass over strategically-placed recharging stations along a line of flight. \u00a0If \u00a0full-size aircraft are able to be sent on long-range missions with such power, \u00a0It would mark a significant change in direction for electric aircraft.<\/p>\n<p><a href=\"http:\/\/lasermotive.com\/wp-content\/uploads\/2010\/04\/Wireless-Power-for-UAVs-March2010.pdf\">LaserMotive\u2019s white paper<\/a> provides more in-depth information on the means used to provide extreme persistence for UAVs.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Fkeeping-a-uav-aloft-for-48-hours-%25e2%2580%2593-on-laser-power%2F&amp;layout=standard&amp;show_faces=true&amp;width=500&amp;action=like&amp;font=segoe+ui&amp;colorscheme=light&amp;height=80\" scrolling=\"no\" frameborder=\"0\" style=\"border:none; overflow:hidden; width:500px; height:80px;\" allowTransparency=\"true\"><\/iframe><\/div>","protected":false},"excerpt":{"rendered":"<p>Lockheed Martin and LaserMotive\u00a0recently managed to keep a drone, the Stalker Unmanned Aerial System (UAS), flying for 48 hours on a laser-guided recharging system.\u00a0 Its on-board batteries can maintain flight for two hours, so the demonstration improves endurance by 2,400 percent. Your editor admits to possibly over-healthy skepticism regarding transmittal of power to aircraft, remembering [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[15,14],"tags":[59,2539,2534,2541,2533,207,2536,2535,2538,2537],"class_list":["post-6246","post","type-post","status-publish","format-standard","category-electric_powerplants","category-sustainable_ga","tag-fuel-cells","tag-laser-transmission-of-power","tag-lasermotive","tag-lithium-polymer-battery","tag-lockheed-martin","tag-nasa","tag-special-operations-forces","tag-stalker-uas","tag-tom-koonce","tag-tom-nugent"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Keeping a UAV Aloft for 48 Hours \u2013 On Laser Power - CAFE Foundation Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/cafe.foundation\/blog\/keeping-a-uav-aloft-for-48-hours-\u2013-on-laser-power\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Keeping a UAV Aloft for 48 Hours \u2013 On Laser Power - CAFE Foundation Blog\" \/>\n<meta property=\"og:description\" content=\"Lockheed Martin and LaserMotive\u00a0recently managed to keep a drone, the Stalker Unmanned Aerial System (UAS), flying for 48 hours on a laser-guided recharging system.\u00a0 Its on-board batteries can maintain flight for two hours, so the demonstration improves endurance by 2,400 percent. 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