{"id":11230,"date":"2017-01-11T12:45:35","date_gmt":"2017-01-11T19:45:35","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=11230"},"modified":"2017-01-20T23:50:04","modified_gmt":"2017-01-21T06:50:04","slug":"how-cheaply-can-one-fly","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/how-cheaply-can-one-fly\/","title":{"rendered":"How Cheaply Can One Fly?"},"content":{"rendered":"<p>How low(cost) can you go and still fly?\u00a0\u00a0 That question forms one of the pursuits of the <em><a href=\"https:\/\/groups.yahoo.com\/neo\/groups\/MinimalistAirplaneStudyGroup\/conversations\/messages\/3246\">Minimalist Airplane Study Group<\/a><\/em>, hosted by William Rich on Yahoo Groups.\u00a0 He may have found an answer that leads to several intriguing alternative uses for the type of electric powerplant described below. \u00a0Use of model aircraft components leads to a low-cost build, and judicious use of off-the-shelf parts from other hobbies keeps costs low and speeds up the development process.<\/p>\n<p>He points to a hack from<em> <a href=\"http:\/\/laserhacker.com\/\">Laserhacker.com<\/a><\/em>, which uses a motor, controller, propeller batteries and connectors one might find at the local hobby shop.\u00a0 This assemblage manages to fly a paramotor despite the small size of the motor and the relatively small size of the propeller.<\/p>\n<p><iframe loading=\"lazy\" title=\"Electric Paramotor!  Charges off my solar panels.\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/uPabWOqnvsc?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><iframe loading=\"lazy\" title=\"Sunny Motor V2 Electric Paramotor $1500-$2000 DIY Project\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/4NBg-yiv9Lo?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><iframe loading=\"lazy\" title=\"Sunny Motor V2 Basic Build Overview - Electric Paramotor\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/J-xFggHsqxg?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 Laserhacker link shows not only several videos (this has to be the most fun per dollar flying machine), but<a href=\"http:\/\/laserhacker.com\/?p=53\"> includes the parts list and pricing for everything but the final battery pack<\/a>.\u00a0 Components include 3D-printed items from <a href=\"http:\/\/www.thingiverse.com\/thing:1897307\">Thingiverse.com<\/a>.<\/p>\n<p><u><\/u>Weighing things out, this would be a remarkably light system.\u00a0 Batteries, for instance, calculated from packs comparable to the listed Zippy\u2019s, would be around 10 pounds.\u00a0 The Turnigy Rotomax motor weighs 7.8 pounds and the Biela carbon fiber propeller a mere 0.6 pound.\u00a0 Even with the backpack frame and \u201cCarp Buster\u201d prop ring and net (clever repurposing of off-the-shelf parts) the system should not be over 25 pounds.\u00a0 This is less of a landing hazard and backache than the up-to-80 pounds of more powerful units.<\/p>\n<p>Such innovations, starting with <a href=\"http:\/\/www.electricppg.com\/Developments\/LemakMotor\/index.htm\">Csaba Lemak\u2019s first flights <\/a>with a powered paramotor in 2007, convinced your editor that lightweight electric flight was a practical and economic reality with rigid-wing machines. After all, Eric Raymond had flown across the United States in 1990\u00a0with his model-motor-powered Sunseeker, and others had demonstrated limited hops before that.\u00a0 But the draggy nature of the powered parasail showed that excellent performance might be possible with the units pushing or pulling ultralight aircraft skyward.\u00a0 Imagine a series of designs that use off-the-shelf model gear (including hybrids) to allow low-budget flying.<\/p>\n<h4>January 12 Followup<\/h4>\n<p>William Rich included the following in his Minimalist Airplane Study Group discussion yesterday. \u00a0It has a link that helps one understand the basic design needs for powered paragliders.<\/p>\n<div id=\"yui_3_15_0_1_1484231648696_1911\">&#8220;The tentative requirements are safety, low cost, 5 to10-minutes duration, and 250-fpm minimum climb for a 175-pound pilot (skivvies). Lots of discussion but it all boils down to energy density, efficiency,\u00a0and work required to achieve the requirements.<\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1910\"><\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1909\">&#8220;The novelty is learning to love short electric flights to save money and minimize propulsion weight.<\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1908\"><\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1896\">&#8220;Perhaps someone would be kind enough to set me straight (I fear our SUNNY pilot may weigh 130-pounds!).<\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1915\"><\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1916\">&#8220;Here is a typical electric discussion thread (of the many) &#8211;<\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1917\"><\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1921\"><u id=\"yui_3_15_0_1_1484231648696_1919\"><span id=\"yui_3_15_0_1_1484231648696_1918\" style=\"color: #0066cc;\">&#8220;<a id=\"yui_3_15_0_1_1484231648696_1920\" href=\"https:\/\/www.rcgroups.com\/forums\/showthread.php?1872317-Need-help-calculating-thrust-and-runtime-for-electric-hang-gliding\" target=\"_blank\" rel=\"nofollow\" data-rapid_p=\"1\">https:\/\/www.rcgroups.com\/forums\/showthread.php?1872317-Need-help-calculating-thrust-and-runtime-for-electric-hang-gliding<\/a>&#8220;<\/span><\/u><\/div>\n<div id=\"yui_3_15_0_1_1484231648696_1922\"><\/div>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Fhow-cheaply-can-one-fly%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>How low(cost) can you go and still fly?\u00a0\u00a0 That question forms one of the pursuits of the Minimalist Airplane Study Group, hosted by William Rich on Yahoo Groups.\u00a0 He may have found an answer that leads to several intriguing alternative uses for the type of electric powerplant described below. \u00a0Use of model aircraft components leads [&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":[6862,6680,14],"tags":[1496,7674,7672,159,7675,2845,3034,7673,1009,2844,1312],"class_list":["post-11230","post","type-post","status-publish","format-standard","category-batteries","category-electric-aircraft-components","category-sustainable_ga","tag-3d-printing","tag-carp-buster-net","tag-csaba-lemak","tag-eric-raymond","tag-laserhacker-com","tag-minimalist-airplane-study-group","tag-powered-parachutes","tag-thingiverse-com","tag-turnigy-motor","tag-william-rich","tag-zippy-lithium-polymer-cells"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Cheaply Can One Fly? 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