{"id":11510,"date":"2017-06-30T18:34:42","date_gmt":"2017-07-01T01:34:42","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=11510"},"modified":"2017-07-03T09:51:57","modified_gmt":"2017-07-03T16:51:57","slug":"oneras-ampere-flies-on-distributed-electric-thrust","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/oneras-ampere-flies-on-distributed-electric-thrust\/","title":{"rendered":"ONERA\u2019s AMPERE Flies on Distributed Electric Thrust"},"content":{"rendered":"<p>ONERA\u2019s mission statement for its\u00a0<a href=\"http:\/\/www.onera.fr\/sites\/default\/files\/actualites\/breves\/Fiche_AMPERE_VA.pdf\">AMPERE (Avion \u00e0 Motorisation r\u00e9Partie \u00c9lectrique de Recherche Exp\u00e9rimentale) electric aircraft<\/a>\u00a0is fairly straightforward.\u00a0 \u201cAMPERE is a demonstrator of a regional airplane with electric propulsion distributed, allowing to transport from 4 to 6 people over 500 [kilometers \u2013 310 miles] in 2 hours.\u00a0 The objective of the AMPERE project is to bring to maturity the technology of distributed electric propulsion in order to transfer it to the industry.\u201d\u00a0 ONERA, the Office National d&#8217;Etudes et de Recherches A\u00e9rospatiales (National Office for the Study and Research of Aerospace) is the French equivalent of NASA.<\/p>\n<p>ONERA showed a one-fifth-scale model of AMPERE at the Paris Air Show last week, with spokesman and designer Jean Hermetz holding forth on the plane\u2019s features.\u00a0 Pardon that the video is in French, but the images are universal.\u00a0 Note the wind tunnel tests at 1:45, showing attached flow over the wing segment on which the electric ducted fans are turning.<\/p>\n<p><iframe loading=\"lazy\" title=\"&quot;Ampere&quot; l&#039;avion taxi tout \u00e9lectrique qui participe \u00e0 la r\u00e9duction des \u00e9missions polluantes\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/bQnf5x9PG4w?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>The idea has been floating around ONERA for some time, with a low-wing, motors-on-trailing-edge approach and the high-wing, motors on leading edge model shown at Paris.\u00a0 ONERA promotes the following advantages for the latter configuration:<\/p>\n<ul>\n<li>The motors\u2019 positions reduce\u00a0loss\u00a0of energy related to friction, through ingestion of the boundary layer.<\/li>\n<li>Take-offs and landings are shorter because the motors blow air over a good portion of the upper wing surface, increasing lift at low speeds.<\/li>\n<li>Motors can participate in the piloting of the airplane, with differential thrust effecting movement or stabilization of the airplane.<\/li>\n<li>AMPERE does not release pollutants during operation.<\/li>\n<li>Flight safety is improved \u201cthrough the sharing of functions.\u201d<\/li>\n<\/ul>\n<div id=\"attachment_11512\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11512\" class=\"size-large wp-image-11512\" src=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/Onera-Ampere-2-528x391.jpg\" alt=\"\" width=\"528\" height=\"391\" srcset=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/Onera-Ampere-2-528x391.jpg 528w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/Onera-Ampere-2-300x222.jpg 300w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/Onera-Ampere-2.jpg 640w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><p id=\"caption-attachment-11512\" class=\"wp-caption-text\">ONERA AMPERE as shown at Paris Air Show has 32 electric motors driving ducted fans<\/p><\/div>\n<p>Wind tunnel tests at Lille, France, have verified the numerical design of the motor integration for distributed propulsion and its wing blowing effect.\u00a0 It has also validated predicted aerodynamic performance calculations.\u00a0\u00a0<a href=\"http:\/\/www.lefigaro.fr\/societes\/2017\/06\/20\/20005-20170620ARTFIG00006-avec-ampere-l-onera-travaille-sur-l-avion-du-futur.php\">Jean Hermetz reports<\/a>, &#8220;The first feedback is convincing: the expected level of performance is there.&#8221;<\/p>\n<div id=\"attachment_11513\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11513\" class=\"wp-image-11513 size-large\" src=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/ampere-in-wind-tunnel-528x352.jpg\" alt=\"\" width=\"528\" height=\"352\" srcset=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/ampere-in-wind-tunnel-528x352.jpg 528w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/ampere-in-wind-tunnel-300x200.jpg 300w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/ampere-in-wind-tunnel.jpg 534w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><p id=\"caption-attachment-11513\" class=\"wp-caption-text\">AMPERE 1\/5-scale model in Lille 2 wind tunnel validating design concepts<\/p><\/div>\n<p>Power will come from fuel cells developed in partnership with Office of the Commissioner of Atomic and Renewable Energy. \u00a0Eight fuel cells provide power to\u00a0the 32 motors, four motors per fuel cell. \u00a0Each motor, in turn, drives an electric ducted fan. \u00a0(<em>This last pair of sentences was added on July 3 for clarity. \u00a0Thank you to Eric Raymond for the suggested change.<\/em>)<\/p>\n<p>A paper by\u00a0Hermetz, Michael Ridel, and Carsten D\u00f6ll explicates the technical challenges involved for energy storage.\u00a0 \u201cThe different scenarios evaluated through the multi-disciplinary approach show that the Polymer Exchange Membrane\u00a0hydrogen\u00a0Fuel Cell (PEMFC) concept is the more promising solution for the considered TLAR (top level aircraft requirements) for providing the electric power (both for propulsion and systems), with the help of a battery pack for instantaneous power demands.\u201d<\/p>\n<p>As batteries improve, the craft could grow from six seats to 50, and range will increase to be competitive with smaller Boeings and Airbuses.<\/p>\n<div id=\"attachment_11514\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11514\" class=\"size-large wp-image-11514\" src=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/AMPERE-low-wing-528x297.jpg\" alt=\"\" width=\"528\" height=\"297\" srcset=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/AMPERE-low-wing-528x297.jpg 528w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/AMPERE-low-wing-300x169.jpg 300w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/AMPERE-low-wing-768x432.jpg 768w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2017\/06\/AMPERE-low-wing.jpg 1000w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><p id=\"caption-attachment-11514\" class=\"wp-caption-text\">AMPERE in low-wing, trailing-edge-mounted motor configuration<\/p><\/div>\n<p>Command and control will take place, \u201cthrough the association of multi-motors and control surfaces,\u201d according to ONERA\u2019s designers.\u00a0 The airplane\u2019s modular architecture and in-flight reconfiguration capabilities will allow the overall electric propulsion system to fly with the least drag for and greatest response to control inputs.\u00a0 ONERA has developed a digital flight simulator to enable future pilots to take advantage of the distributed\u00a0thrust\u00a0and to coordinate the motors and control surfaces in new ways.\u00a0 Eventually, ONERA hopes to do away with control surfaces altogether, using differential thrust to manage all flight maneuvers.<\/p>\n<p>With innovative ideas flooding the next generation of creative aerial solutions, we can all be buoyed by the prospects of many of these new concepts reaching commercial reality.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Foneras-ampere-flies-on-distributed-electric-thrust%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>ONERA\u2019s mission statement for its\u00a0AMPERE (Avion \u00e0 Motorisation r\u00e9Partie \u00c9lectrique de Recherche Exp\u00e9rimentale) electric aircraft\u00a0is fairly straightforward.\u00a0 \u201cAMPERE is a demonstrator of a regional airplane with electric propulsion distributed, allowing to transport from 4 to 6 people over 500 [kilometers \u2013 310 miles] in 2 hours.\u00a0 The objective of the AMPERE project is to bring [&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":[6862,15,7555,14],"tags":[8009,8010,8011,8012,8013,8014,8015],"class_list":["post-11510","post","type-post","status-publish","format-standard","category-batteries","category-electric_powerplants","category-fuel-cells","category-sustainable_ga","tag-ampere-avion-a-motorisation-repartie-electrique-de-recherche-experimentale-electric-aircraft","tag-carsten-doll","tag-hermetz","tag-michael-ridel","tag-onera-the-office-national-detudes-et-de-recherches-aerospatiales","tag-polymer-exchange-membrane-hydrogen-fuel-cell-pemfc","tag-tlar-top-level-aircraft-requirements"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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