{"id":3741,"date":"2011-07-15T13:14:50","date_gmt":"2011-07-15T20:14:50","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=3741"},"modified":"2011-07-17T17:55:02","modified_gmt":"2011-07-18T00:55:02","slug":"electric-gull-flies-at-arlington","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/electric-gull-flies-at-arlington\/","title":{"rendered":"Electric Gull Flies at Arlington"},"content":{"rendered":"<p>The\u00a0annual fly in at Arlington, Washington was an electric landing zone for <a href=\"http:\/\/www.thundergull.com\/\">Mark Beierle\u2019s Gull 2000<\/a>, powered by his own design 20-kilowatt motor.\u00a0 The 36-coil, 42 magnet disk, weighing 16 pounds, is mounted on a truss arrangement behind the airplane\u2019s high wing, and drives a ground-adjustable pusher propeller.<\/p>\n<p>Flying five half-hour demonstration flights during the half-week event accounted for almost half the six hours total time on the airplane so far.<\/p>\n<p><iframe loading=\"lazy\" title=\"Earthstar Electric Gull 2000 at Arlington 2011\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/lEqz0rSZ0v8?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 airplane has a 74-Volt<a href=\"http:\/\/www.hobbyking.com\/hobbyking\/store\/uh_listCategoriesAndProducts.asp?idCategory=252&amp;curPage=1&amp;v=&amp;sortlist=&amp;LiPoConfig=\"> Rhino Lithium-polymer battery  pack <\/a>made up to 11 packs in a parallel\/series arrangement.  Beierle says this array, and taking voltage from  the ends of each 3.7-Volt series pack, allows balancing of all 210 cells.  Power is run through a <a href=\"http:\/\/kellycontroller.com\/index.php\">500-Amp Kelly controller<\/a>, which weighs about 12 pounds: Beierle hopes to try a new Kelly  unit which will be half that weight\u00a0and less expensive.\u00a0\u00a0 Battery protection is provided by circuits in  the charger, which will be the same Kelly unit Beierle uses in recharging his  electric cars.  Incidentally, he uses the  same battery packs in his ground vehicles.<\/p>\n<p>A\u00a0<a href=\"http:\/\/www.ebikes.ca\/drainbrain.shtml\">Cycle Analyst <\/a>device monitors motor  performance and battery status. \u00a0 Normally used on bicycles,  the Analyst is a low-budget instrument which fits the economical approach favored  by Beierle.<\/p>\n<p>Originally powered by a PMG 132 motor, the Electric Gull 2000  was a bit short on performance. \u00a0 The new  motor, designed with the help of a German physicist, is a considerable  improvement, according to Beierle. \u00a0 He  built the motor from computer drawings by his designer, who then joined Mark  for early testing and tweaking of the machine.<\/p>\n<p>The new combination provides an attractive  performance profile.  The airplane can  maintain flight for 1.5 hours at a cruise of 65 miles per hour.<\/p>\n<p>Beierle reports pulling 217 Amps on takeoff, 211 in  climb, and only 40 Amps at 55 mph.  He  has not used full power yet, but will after adjusting the pitch of the  propeller to require more amperage for takeoff.<\/p>\n<p>He is also looking at <a href=\"http:\/\/www.jobymotors.com\/public\/views\/pages\/products.php\">Joby Motors\u2019 JM2 series<\/a>,  noting the even greater power and reasonable price.\u00a0  This would make a nicely-priced power package, with the motor at  $1,299, the controller at $1,000, and the battery pack costing about $2,000.  A $4,299 system (not including instruments and cabling)\u00a0attached to a $10,000  airplane could give hours of inexpensive flying.<\/p>\n<p>Beierle claims ultralight status for the airplane,  which like Dale Kramer\u2019s electric Lazair, could make electric flight a  realizable objective for many pilots.\u00a0  Both craft will be at AirVenture 2011 in Oshkosh, Wisconsin late in  July.\u00a0 Live examples of what simple electric airplanes can be will probably excite a lot of interest on the ultralight field.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Felectric-gull-flies-at-arlington%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\u00a0annual fly in at Arlington, Washington was an electric landing zone for Mark Beierle\u2019s Gull 2000, powered by his own design 20-kilowatt motor.\u00a0 The 36-coil, 42 magnet disk, weighing 16 pounds, is mounted on a truss arrangement behind the airplane\u2019s high wing, and drives a ground-adjustable pusher propeller. Flying five half-hour demonstration flights during 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":[15,14],"tags":[1423,695,1306,1421,1416,1417,1422,1222,1420,1307,1418,575,1419,1415],"class_list":["post-3741","post","type-post","status-publish","format-standard","category-electric_powerplants","category-sustainable_ga","tag-airventure-2011","tag-cycle-analyst","tag-dale-kramer","tag-eaa-arlington-airshow","tag-electric-gull-2000","tag-hobby-king","tag-joby-jm2","tag-joby-motors","tag-kellly-controllers","tag-lazair","tag-lithium-polymer-batteries","tag-mark-beierle","tag-rhino-lithium-batteries","tag-thunder-gull-2000"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Electric Gull Flies at Arlington  - 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\/electric-gull-flies-at-arlington\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Electric Gull Flies at Arlington  - CAFE Foundation Blog\" \/>\n<meta property=\"og:description\" content=\"The\u00a0annual fly in at Arlington, Washington was an electric landing zone for Mark Beierle\u2019s Gull 2000, powered by his own design 20-kilowatt motor.\u00a0 The 36-coil, 42 magnet disk, weighing 16 pounds, is mounted on a truss arrangement behind the airplane\u2019s high wing, and drives a ground-adjustable pusher propeller. 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