{"id":14219,"date":"2021-09-18T21:45:26","date_gmt":"2021-09-19T04:45:26","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=14219"},"modified":"2021-09-18T21:45:26","modified_gmt":"2021-09-19T04:45:26","slug":"pair-dutch-electric-dragonflys","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/","title":{"rendered":"A Pair of Dutch Electric Dragonfly&#8217;s"},"content":{"rendered":"<p>Dragonfly is a great name for the tandem-wing, two-seat aircraft, with the forward wing mounted low and the rear wing higher and behind the cockpit.\u00a0 Students at <a href=\"https:\/\/www.inholland.nl\/inhollandcom\/bachelors-degrees\/aeronautical-engineering-en-fulltime\/\">InHolland University of Applied Sciences<\/a> now have two of these <em>anisoptera<\/em>-like craft they are converting to electric power.\u00a0 Considering there are only two such airplanes registered in The Netherlands, 100 percent of all Dragonflies in the country will soon be electric.\u00a0 Over 500 have been completed worldwide in the last four decades.<\/p>\n<p><iframe loading=\"lazy\" title=\"Project DragonFly - Electric Airplane developed at Inholland in Delft\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/gf4arw-tjHs?start=9&#038;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>According to the school, \u201cThe airframe design is visually similar to the RAF\u2019s Quickie 2, which was developed independently, but the Dragonfly has larger airfoils and was designed for a smaller engine, resulting in a slower but more docile handling aircraft. Originally 60 hp (45 kW) Volkswagen air-cooled and 85 hp (63 kW) Jabiru 2200 four-stroke powerplants were used with the Dragonfly. With a redesign to a battery-electric variant [Project DragonFly] Inholland and partners want to demonstrate the viability of electrifying existing small aircraft for\u2026 general aviation.\u201d\u00a0 The team has developed two powertrain strategies apparently, visible as a single motor in one version, and a speed-reduced pair of motors in the other.\u00a0 <a href=\"https:\/\/www.saluqimotors.com\/2016\/11\/23\/high-performance-electric-drives\/\">Motors are supplied by Saluqui<\/a>.<\/p>\n<div id=\"attachment_17017\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17017\" class=\"wp-image-17017\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg\" alt=\"\" width=\"600\" height=\"338\" \/><\/a><p id=\"caption-attachment-17017\" class=\"wp-caption-text\">Combining virtual and real elements, the Delft-based Dragonfly shows single motor, original raw finish.\u00a0 Note compact arrangement of motor, batteries and associated systems<\/p><\/div>\n<p>Oversimplifying a bit, project manager Mark Ommert summarizes the planned strategy.\u00a0 \u201cThe advantage of electric motors is that they are much lighter. In this case, you replace a 100-kilogram motor with one of 15 kilograms.\u00a0 Then you have the weight of an entire passenger left to spend on your energy source.\u201d\u00a0 Seemingly simple, this requires some rethinking of weights and balances for the craft, and the need for compact power sources.<\/p>\n<h4><strong>Envisioning the New Airplane<\/strong><\/h4>\n<p>To help visualize how those power sources could fit in their re-imagined dragonfly\u2019s, the team used an impressive array of tools to help \u201csee\u201d accurately the dimensions of the aircraft, and then how to distribute the elements of the power train.<\/p>\n<p>The challenge of dealing with complex 40 year old hardcopy drawings was solved by 3D metrology experts from TetraVision, who used advanced 3D scanning technology. This resulted in a six meter by six meter by two meter 3D model of the Viking Dragonfly airplane with 0.1 millimeter accuracy. \u00a0This \u201cdigital twin\u201d allows for comparison with the actual machine.<\/p>\n<div id=\"attachment_17018\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly_3dscan_tetravision6.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17018\" class=\"wp-image-17018\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly_3dscan_tetravision6-528x396.jpg\" alt=\"\" width=\"600\" height=\"450\" \/><\/a><p id=\"caption-attachment-17018\" class=\"wp-caption-text\">TetraVision system scans allowed accurate metrology of entire airplane, to 0.1 mm<\/p><\/div>\n<p>Aeronautical Engineering student Kiril Medarov developed a mixed reality application to perform quality checks during manufacturing processes. Able to detect differences between a virtual Dragonfly and the real article allows potential detection of manufacturing alterations or defects.<\/p>\n<p>To enable realistic flight simulation to train potential pilots, Researcher Marco Withag developed a program that will allow them to, \u201cGet used to the flight behavior and onboard systems, before going to take-off in the real Dragonfly. \u00a0The flight simulation model can be flown in a virtual reality environment, combined with a motion platform that offers three degrees of freedom. This unique combination offers the pilot the opportunity to see and feel how the aircraft behaves under various pay-load configurations and with electrical powertrains.\u201d<\/p>\n<div id=\"attachment_17020\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly_student_researchers3_web.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-17020\" class=\"wp-image-17020\" src=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly_student_researchers3_web-528x297.jpg\" alt=\"\" width=\"600\" height=\"338\" \/><\/a><p id=\"caption-attachment-17020\" class=\"wp-caption-text\">Students taking advantage of full range of computer assistance in project<\/p><\/div>\n<p>Flight behavior of the Dragonfly is modeled using PlaneMaker, a development tool provided by Laminar Research, which backs the X-Plane flight simulator series. \u00a0X-Plane uses the blade element theory to calculate the forces on the aircraft during flight, according to the Delft team.<\/p>\n<h4>Blending It All Together<\/h4>\n<p>Modeled and animated in Blender, the free and open-source 3D creation tool can perform, \u201cModeling, rigging, animation, simulation, rendering, compositing and motion tracking. The model is still under construction but will be available for the public when it is finished, according to the team.<\/p>\n<p><iframe loading=\"lazy\" title=\"Project DragonFly expanding to TPY\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/EDB_TqayBWQ?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>With what appear to be hundreds of students having seen the project and its two exemplars, the program has expanded to include the original donor plane in Delft and the second in Ypenburg, painted in what looks like a <em>homage<\/em> to Piet Mondrian, the Dutch painter. Two Dutch electric Dragonfly&#8217;s may appear at next year\u2019s Paris Air Show.\u00a0 Arnold Koetje Manager of the Applied Sciences Labs, Inholland in Delft shares that ambition.\u00a0 \u00a0\u201cThat will be the concept, although we want to be a long way by then.\u00a0 We also want the aircraft to actually fly by 2023.\u00a0 Koetje hopes that this can also be an example for the tens of thousands of \u201csport aircraft\u201d worldwide.<\/p>\n<p>Project goals include making a cleaner, quieter, smarter Dragonfly.\u00a0 The lessons learned from these two builds and the tools created to make them possible can be applied to other such conversions of other light aircraft.\u00a0 That\u2019s a gift to all.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Fpair-dutch-electric-dragonflys%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>Dragonfly is a great name for the tandem-wing, two-seat aircraft, with the forward wing mounted low and the rear wing higher and behind the cockpit.\u00a0 Students at InHolland University of Applied Sciences now have two of these anisoptera-like craft they are converting to electric power.\u00a0 Considering there are only two such airplanes registered in The [&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":[6862,15,14],"tags":[11029,11030,11031,11032,11033,11034,1231,11035,11036,11037,11038,11039],"class_list":["post-14219","post","type-post","status-publish","format-standard","category-batteries","category-electric_powerplants","category-sustainable_ga","tag-digital-twins","tag-arnold-koetje","tag-inholland-university-of-applied-sciences","tag-kiril-medarov","tag-laminar-research","tag-marco-withag","tag-paris-air-show","tag-planemaker-computer-program","tag-project-dragonfly-inholland","tag-rafs-quickie-2","tag-tetravision","tag-x-plane-flight-simulator-series"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A Pair of Dutch Electric Dragonfly&#039;s - CAFE Foundation Blog<\/title>\n<meta name=\"description\" content=\"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly&#039;s, anisoptera-like craft they are crafting.\u00a0\" \/>\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\/pair-dutch-electric-dragonflys\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Pair of Dutch Electric Dragonfly&#039;s - CAFE Foundation Blog\" \/>\n<meta property=\"og:description\" content=\"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly&#039;s, anisoptera-like craft they are crafting.\u00a0\" \/>\n<meta property=\"og:url\" content=\"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/\" \/>\n<meta property=\"og:site_name\" content=\"CAFE Foundation Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-09-19T04:45:26+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg\" \/>\n<meta name=\"author\" content=\"Dean Sigler\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dean Sigler\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#article\",\"isPartOf\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/\"},\"author\":{\"name\":\"Dean Sigler\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/#\\\/schema\\\/person\\\/e9c06a89f78d39fc03473ec90f4902a7\"},\"headline\":\"A Pair of Dutch Electric Dragonfly&#8217;s\",\"datePublished\":\"2021-09-19T04:45:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/\"},\"wordCount\":820,\"commentCount\":0,\"image\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/sustainableskies.org\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/dragonfly-ghost-motor-528x297.jpg\",\"keywords\":[\"\u201cdigital twins\u201d\",\"Arnold Koetje\",\"InHolland University of Applied Sciences\",\"Kiril Medarov\",\"Laminar Research\",\"Marco Withag\",\"Paris Air Show\",\"PlaneMaker computer program\",\"Project DragonFly Inholland\",\"RAF\u2019s Quickie 2\",\"TetraVision\",\"X-Plane flight simulator series\"],\"articleSection\":[\"Batteries\",\"Electric Powerplants\",\"Sustainable Aviation\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/\",\"url\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/\",\"name\":\"A Pair of Dutch Electric Dragonfly's - CAFE Foundation Blog\",\"isPartOf\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#primaryimage\"},\"image\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/sustainableskies.org\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/dragonfly-ghost-motor-528x297.jpg\",\"datePublished\":\"2021-09-19T04:45:26+00:00\",\"author\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/#\\\/schema\\\/person\\\/e9c06a89f78d39fc03473ec90f4902a7\"},\"description\":\"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly's, anisoptera-like craft they are crafting.\u00a0\",\"breadcrumb\":{\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#primaryimage\",\"url\":\"http:\\\/\\\/sustainableskies.org\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/dragonfly-ghost-motor-528x297.jpg\",\"contentUrl\":\"http:\\\/\\\/sustainableskies.org\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/dragonfly-ghost-motor-528x297.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/pair-dutch-electric-dragonflys\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"A Pair of Dutch Electric Dragonfly&#8217;s\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/#website\",\"url\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/\",\"name\":\"CAFE Foundation Blog\",\"description\":\"Information and discussion from the Comparative Aircraft Flight Efficiency (CAFE) Foundation.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/#\\\/schema\\\/person\\\/e9c06a89f78d39fc03473ec90f4902a7\",\"name\":\"Dean Sigler\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g\",\"caption\":\"Dean Sigler\"},\"sameAs\":[\"http:\\\/\\\/cafefoundation.org\"],\"url\":\"http:\\\/\\\/cafe.foundation\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"A Pair of Dutch Electric Dragonfly's - CAFE Foundation Blog","description":"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly's, anisoptera-like craft they are crafting.\u00a0","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/","og_locale":"en_US","og_type":"article","og_title":"A Pair of Dutch Electric Dragonfly's - CAFE Foundation Blog","og_description":"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly's, anisoptera-like craft they are crafting.\u00a0","og_url":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/","og_site_name":"CAFE Foundation Blog","article_published_time":"2021-09-19T04:45:26+00:00","og_image":[{"url":"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg","type":"","width":"","height":""}],"author":"Dean Sigler","twitter_misc":{"Written by":"Dean Sigler","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#article","isPartOf":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/"},"author":{"name":"Dean Sigler","@id":"http:\/\/cafe.foundation\/blog\/#\/schema\/person\/e9c06a89f78d39fc03473ec90f4902a7"},"headline":"A Pair of Dutch Electric Dragonfly&#8217;s","datePublished":"2021-09-19T04:45:26+00:00","mainEntityOfPage":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/"},"wordCount":820,"commentCount":0,"image":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#primaryimage"},"thumbnailUrl":"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg","keywords":["\u201cdigital twins\u201d","Arnold Koetje","InHolland University of Applied Sciences","Kiril Medarov","Laminar Research","Marco Withag","Paris Air Show","PlaneMaker computer program","Project DragonFly Inholland","RAF\u2019s Quickie 2","TetraVision","X-Plane flight simulator series"],"articleSection":["Batteries","Electric Powerplants","Sustainable Aviation"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#respond"]}]},{"@type":"WebPage","@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/","url":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/","name":"A Pair of Dutch Electric Dragonfly's - CAFE Foundation Blog","isPartOf":{"@id":"http:\/\/cafe.foundation\/blog\/#website"},"primaryImageOfPage":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#primaryimage"},"image":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#primaryimage"},"thumbnailUrl":"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg","datePublished":"2021-09-19T04:45:26+00:00","author":{"@id":"http:\/\/cafe.foundation\/blog\/#\/schema\/person\/e9c06a89f78d39fc03473ec90f4902a7"},"description":"Students at InHolland University of Applied Sciences now have two Dutch electtricDragonfly's, anisoptera-like craft they are crafting.\u00a0","breadcrumb":{"@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#primaryimage","url":"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg","contentUrl":"http:\/\/sustainableskies.org\/wp-content\/uploads\/2021\/09\/dragonfly-ghost-motor-528x297.jpg"},{"@type":"BreadcrumbList","@id":"http:\/\/cafe.foundation\/blog\/pair-dutch-electric-dragonflys\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"http:\/\/cafe.foundation\/blog\/"},{"@type":"ListItem","position":2,"name":"A Pair of Dutch Electric Dragonfly&#8217;s"}]},{"@type":"WebSite","@id":"http:\/\/cafe.foundation\/blog\/#website","url":"http:\/\/cafe.foundation\/blog\/","name":"CAFE Foundation Blog","description":"Information and discussion from the Comparative Aircraft Flight Efficiency (CAFE) Foundation.","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"http:\/\/cafe.foundation\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"http:\/\/cafe.foundation\/blog\/#\/schema\/person\/e9c06a89f78d39fc03473ec90f4902a7","name":"Dean Sigler","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/0da6e77f17fefcd82e6b725d7f52d2ee07f3aa62cd3699007b8af82a7b52dc23?s=96&d=mm&r=g","caption":"Dean Sigler"},"sameAs":["http:\/\/cafefoundation.org"],"url":"http:\/\/cafe.foundation\/blog\/author\/admin\/"}]}},"_links":{"self":[{"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/posts\/14219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/comments?post=14219"}],"version-history":[{"count":1,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/posts\/14219\/revisions"}],"predecessor-version":[{"id":14222,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/posts\/14219\/revisions\/14222"}],"wp:attachment":[{"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/media?parent=14219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/categories?post=14219"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/cafe.foundation\/blog\/wp-json\/wp\/v2\/tags?post=14219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}