{"id":12479,"date":"2020-07-05T22:32:48","date_gmt":"2020-07-06T05:32:48","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=12479"},"modified":"2020-07-05T22:32:48","modified_gmt":"2020-07-06T05:32:48","slug":"pipistrel-velis-part-of-an-electric-heritage","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/pipistrel-velis-part-of-an-electric-heritage\/","title":{"rendered":"Pipistrel Velis: Part of an Electric Heritage"},"content":{"rendered":"<p>The Pipistrel Velis is the culmination of 13 years of electric aircraft development and the first to gain certification by the European Union Aviation Safety Agency (EASA) on June 10.<\/p>\n<p>Pipistrel has been in the electric airplane business since 2007 when it announced <a href=\"https:\/\/en.wikipedia.org\/wiki\/Pipistrel_Taurus\">the Taurus Electro motorglider<\/a>, which entered service in 2011.\u00a0 That aircraft went through several iterations, and is still part of the Pipistrel lineup of electric planes, which includes the Alpha Electro Trainer, the Panthera Hybrid, and the new Velis.<\/p>\n<p><iframe loading=\"lazy\" title=\"Pipistrel Electric Aircraft - Taurus, Alpha, and Velis Electro\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/IfdwrNWGf0E?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><strong>Alpha Electro Trainer in SoCal<\/strong><\/p>\n<p>An electric version of the Alpha Trainer, the Electro has been in production since 2015. \u00a0With an empty weight of 615 pounds (279 kg) and a maximum take-off weight of 1,212 pounds (550 kg), it is a bit heavier than the Rotax-powered gas version, and carries about 100 pounds less payload.\u00a0 Both have similar performance, though, with rates of climb around 1,200 feet per minute.<\/p>\n<p>Joseph Oldham started a well-organized, well-intentioned operation to bring electric flight to California\u2019s Central Valley.\u00a0\u00a0 His <a href=\"https:\/\/sustainableaviationproject.com\/\">Sustainable Aviation Project<\/a> aims to train low-income young people in electric training craft and give them a different direction in life than otherwise might be possible.\u00a0 Beth Stanton, an aerobatic pilot and writer for the Experimental Aircraft Association\u2019s <em>Sport Aviation<\/em>, flew with John in an Alpha Electro recently and wrote about it in the July issue of EAA\u2019s magazine.<\/p>\n<div id=\"attachment_15224\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistel-velis-electro-in-flight.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15224\" class=\"size-large wp-image-15224\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistel-velis-electro-in-flight-528x352.jpg\" alt=\"\" width=\"528\" height=\"352\" \/><\/a><p id=\"caption-attachment-15224\" class=\"wp-caption-text\">Pipistrel velis electro in flight<\/p><\/div>\n<p>Michael Coates republished it in the <a href=\"https:\/\/www.pipistrel-usa.com\/newsletter-130-june-2020\/\">Pipistrel USA newsletter number 130<\/a>, where it details the careful planning and execution of getting four Electros through 100 hours of flight in the heat of the Central Valley.\u00a0 Oldham even went to the trouble of creating an air-conditioning hookup to keep batteries from overheating.\u00a0 His efforts allowed him to achieve 175 hours in different Electros, 111 in one example.\u00a0 That batteries survived the long, hot days of summer was a major victory, although the air-cooled motor controllers often reached the limits of their operating temperatures.\u00a0 Pilots applied limits to keep things cool, but the airplanes still performed better than one might expect.<\/p>\n<p>Beth reports, \u201cAt full throttle, the Alpha Electro jumped o\ufb00 the runway faster than the gas-powered version. As we cruised around the valley, I noticed that it had more docile handling characteristics compared to the gas-powered version. Joseph said that the electric motor has smoother power than a four-cylinder combustion engine. I was careful to keep coordinated \ufb02ight, as any tiny amount of drag decreases e\ufb03ciency (and time aloft). It was surreal to glance at the SOC reading as opposed to the familiar fuel, engine, and oil gauges.\u201d\u00a0 She has vowed to return for further training, \u201cOnce these babies are certi\ufb01ed for instruction, I\u2019m going to be \ufb01rst in line to get checked out to \ufb02y them.\u201d<\/p>\n<p><strong>A Liquid-Cooled Solution<\/strong><\/p>\n<p>The new Velis has added liquid cooling to its motor, controller, and batteries to enable its use even in hotter climes outside its Slovenian homeland.<\/p>\n<p>\u201c<a href=\"https:\/\/www.pipistrel-aircraft.com\/aircraft\/electric-flight\/velis-electro-easa-tc\/\">As part of the Type Certification,<\/a> Pipistrel demonstrated that Velis Electro achieves the highest levels of safety, even surpassing those required for conventionally powered aircraft.<\/p>\n<p>\u201cVelis Electro is a full-electric derivative of the proven Virus SW 121, which is already type certified by the European Union Aviation Safety Agency (TC No EASA.A.573). It is equipped with a Pipistrel type certified electric engine E-811-268MVLC (TC No. EASA.E.234), developed with partners EMRAX and EMSISO, and Pipistrel\u2019s three-bladed composite fixed pitch propeller P-812-164-F3A.<\/p>\n<p>\u201cThe 57.6kW liquid cooled electric engine provides power to the aircraft.<\/p>\n<div id=\"attachment_15221\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistreal-E811_inVelis_nocover.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15221\" class=\"size-large wp-image-15221\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistreal-E811_inVelis_nocover-528x372.png\" alt=\"\" width=\"528\" height=\"372\" \/><\/a><p id=\"caption-attachment-15221\" class=\"wp-caption-text\">Pipistrel&#8217;s E811 type-certified motor in its Velis mount.\u00a0 Note charging port behind starboard side of motor<\/p><\/div>\n<p>\u201cThe power is delivered by 345 VDC electric system built around a liquid-cooled in-house developed high performance battery system, which includes two Pipistrel PB345V124E-L batteries connected in parallel, installed in a redundant 2-unit arrangement, total nominal capacity 24.8 kWh. Crashworthy, thermal runaway inhibiting, HIRF\/EMI tolerant.<\/p>\n<div id=\"attachment_15219\" style=\"width: 464px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistrel-velix-batteries.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15219\" class=\"size-full wp-image-15219\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistrel-velix-batteries.jpg\" alt=\"\" width=\"454\" height=\"257\" \/><\/a><p id=\"caption-attachment-15219\" class=\"wp-caption-text\">Pipistrels 60 kilogram, liquid-cooled battery packs<\/p><\/div>\n<p>\u201cOne battery pack is located in the nose of the airplane and the second behind the cabin. This ensures redundancy of the power source: in case of battery failure, the malfunctioning battery would get automatically disconnected from the system. A single battery is capable of standalone operation and has enough power capability to support climbing and continuation of flight.<\/p>\n<p>\u201cThe liquid-cooling system consists of a radiator and two electrically driven pumps installed in series, located behind the rear battery pack. An air inlet for the radiator is located on left side of the fuselage, and the warm air leaves the fuselage at the bottom. Two high power axial fans are installed behind the radiator in order to allow battery cooling during charging. The fans are automatically controlled and monitored by the BMS for seamless operation.<\/p>\n<p>\u201cBatteries can be charged via an onboard charging port using a Pipistrel electric charger. The whole operation is overseen by the Main computer, which displays the status of all systems on the Pipistrel EPSI 570C.\u201d<\/p>\n<div id=\"attachment_15222\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistel-drive-H300C_45-1030x777.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15222\" class=\"size-large wp-image-15222\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2020\/07\/pipistel-drive-H300C_45-1030x777-528x398.png\" alt=\"\" width=\"528\" height=\"398\" \/><\/a><p id=\"caption-attachment-15222\" class=\"wp-caption-text\">The controller receives torque command via CAN bus and adjusts the motor current input accordingly through the engine\u2019s high voltage AC bus. The motor reacts instantaneously and without hesitation<\/p><\/div>\n<p>The upgrades in the Velis ensure that it will have a long service life, operational safety, and the cost benefits of electric aircraft operation.\u00a0 Pipistrel claims a one euro ($1.13) per hour battery cost.\u00a0 Beth\u2019s article notes a $4 per hour battery charging expense.\u00a0\u00a0 Neither comes close to the costs associated with avgas consumption.<\/p>\n<p>Current pricing for a standard configuration Velis Electro is 159,000 euros (about $179,000).\u00a0 This is at the top of the range for Light Sport Aircraft, and the price is offset by the low operating and maintenance costs one can expect.<\/p>\n<p>It looks like a winning approach to lowering the cost of flight instruction and bringing more potential pilots into the new world of electric aviation.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Fpipistrel-velis-part-of-an-electric-heritage%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>The Pipistrel Velis is the culmination of 13 years of electric aircraft development and the first to gain certification by the European Union Aviation Safety Agency (EASA) on June 10. Pipistrel has been in the electric airplane business since 2007 when it announced the Taurus Electro motorglider, which entered service in 2011.\u00a0 That aircraft went [&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":[7568,6680,15,14],"tags":[8033,10121,10122,421,8501,1218,7652,10123,10124,8039,8505],"class_list":["post-12479","post","type-post","status-publish","format-standard","category-announcements","category-electric-aircraft-components","category-electric_powerplants","category-sustainable_ga","tag-beth-stanton","tag-emrax","tag-emsiso","tag-experimental-aircraft-association","tag-joseph-oldham","tag-michael-coates","tag-pipistrel-alpha-electro-trainer","tag-pipistrel-taurus-electro","tag-pipistrel-velis-electro","tag-sport-aviation","tag-sustainable-aviation-project"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pipistrel Velis: Part of an Electric Heritage - 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=\"https:\/\/cafe.foundation\/blog\/pipistrel-velis-part-of-an-electric-heritage\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pipistrel Velis: Part of an Electric Heritage - CAFE Foundation Blog\" \/>\n<meta property=\"og:description\" content=\"The Pipistrel Velis is the culmination of 13 years of electric aircraft development and the first to gain certification by the European Union Aviation Safety Agency (EASA) on June 10. 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