{"id":369,"date":"2016-04-12T17:29:49","date_gmt":"2016-04-12T17:29:49","guid":{"rendered":"http:\/\/jaisor.net\/?p=369"},"modified":"2016-04-12T17:29:49","modified_gmt":"2016-04-12T17:29:49","slug":"thrust-tests-rotorgeeks-cobras-2300kv-emax-redbottoms-2600kv","status":"publish","type":"post","link":"https:\/\/jaisor.net\/index.php\/2016\/04\/12\/thrust-tests-rotorgeeks-cobras-2300kv-emax-redbottoms-2600kv\/","title":{"rendered":"Thrust Tests &#8211; Rotorgeeks, Cobras 2300KV &#8211; EMAX RedBottoms 2600KV"},"content":{"rendered":"<p>Few weeks ago I ordered the Turnigy Thrust Stand and Power Analyser v2 from <a href=\"http:\/\/www.hobbyking.com\/hobbyking\/store\/__84687__Turnigy_Thrust_Stand_and_Power_Analyser_v2.html\">HobbyKing<\/a>.\u00a0The initial thrust measurements were not accurate so I took it apart to discover one of the linear bearings was bad. This weekend, the bearing replacement arrived. After a swap and few drops of motor oil the weight measurements were spot on. The electrical measurements were correct as I verified with an external G.T. Power RC module.<\/p>\n<h2>The Setup<\/h2>\n<p>I\u00a0have two identical nano-tech 2.2Ah tanks that get swapped\u00a0after each prop. If the voltage goes below 16.7v I top them off. All motors are brand new and never flown on a quad. Those are the spare 5th I keep &#8220;in-case&#8221; for my builds.<\/p>\n<p><a href=\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52.jpg\" rel=\"attachment wp-att-370\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-370 size-large aligncenter\" src=\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-1024x768.jpg\" alt=\"2016-04-11 19.17.52\" width=\"640\" height=\"480\" srcset=\"https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-1024x768.jpg 1024w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-300x225.jpg 300w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-768x576.jpg 768w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-1536x1152.jpg 1536w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-2048x1536.jpg 2048w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-1200x900.jpg 1200w, https:\/\/jaisor.net\/wp-content\/uploads\/2016\/04\/2016-04-11-19.17.52-1980x1485.jpg 1980w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p><strong>ESC:<\/strong>\u00a0DYS XM 30A BLHeli 14.3 &#8211; medium timing<\/p>\n<p><strong>LiPo:<\/strong> 16.7v nano-tech 4S 2200mAh 45-90C<\/p>\n<p><strong>Props:<\/strong> I mostly fly DAL pros so that is what I focused on. I was curious about the HQs so I threw them in the mix:<\/p>\n<ul>\n<li>DAL T5045 Bull Nose TRI<\/li>\n<li>DAL T5045 Blunt Nose TRI<\/li>\n<li>DAL T5040 TRI DAL T5040 TRI<\/li>\n<li>DAL 5045 Bull Nose V1<\/li>\n<li>DAL 5045 Blunt Nose<\/li>\n<li>HQ 5&#215;3<\/li>\n<li>DAL J5045<\/li>\n<li>DAL T4045 Bull Nose TRI<\/li>\n<li>DAL 4045 Bull Nose<\/li>\n<\/ul>\n<p><strong>Motors:<\/strong><\/p>\n<ul>\n<li>Rotorgeeks 2204 2300KV<\/li>\n<li>Cobra 2204 2300KV<\/li>\n<li>EMAX RS2205 2600KV (red bottoms)<\/li>\n<\/ul>\n<h2>Rotorgeeks 2204 2300kv<\/h2>\nThe table with ID 1 not exists.\n<p>&nbsp;<\/p>\nThe table with ID 2 not exists.\n<p>&nbsp;<\/p>\n<p>[supsystic-table-diagram id=&#8217;3&#8242;]<\/p>\n<h2>Cobra\u00a02204 2300kv<\/h2>\nThe table with ID 3 not exists.\n<p>&nbsp;<\/p>\nThe table with ID 4 not exists.\n<p>&nbsp;<\/p>\n<p>[supsystic-table-diagram id=&#8217;4&#8242;]<\/p>\n<h2>EMAX RS2205 2600kv (Red Bottoms)<\/h2>\nThe table with ID 5 not exists.\n<p>&nbsp;<\/p>\nThe table with ID 6 not exists.\n<p>&nbsp;<\/p>\n<p>[supsystic-table-diagram id=&#8217;12&#8217;]<\/p>\n<h2>Comparison<\/h2>\n<p>[supsystic-table-diagram id=&#8217;9&#8242;]<\/p>\n<p>&nbsp;<\/p>\n<p>[supsystic-table-diagram id=&#8217;10&#8217;]<\/p>\n<h2>Summary<\/h2>\n<ul>\n<li>Cobras and Rotorgeeks 2300KV are very close, with Cobras slightly more efficient (3.9%) but producing marginally less thrust (-1.55%) on average<\/li>\n<li>The EMAX 2205 2600KV Red Bottoms are beasts! With 1.3kg of thrust on\u00a05&#8243; and close to 1kg on\u00a04&#8243; tri-blade props, I see why they are hyped so much. The EMAX\u00a0outdid Rotorgeeks\u00a0and Cobra thrust by about 25% at the cost of -15% efficiency.<\/li>\n<li>DAL Blunt Nose props are great &#8211; good balance between power and efficiency<\/li>\n<li>DAL Bullnose are more powerful at lower RPM but very inefficient at full throttle (crazy high amps)<\/li>\n<li>The HQ 5&#215;3 is a clear winner\u00a0in efficiency, yet producing respectable amount of thrust. The\u00a0EMAX 2600KV with\u00a0HQ 5&#215;3 will rip around at 939g of thrust, drawing just under 21A.<\/li>\n<\/ul>\n<p>Here is <a href=\"https:\/\/www.dropbox.com\/s\/vgmbgr2927lad5r\/Thrust%20Tests%20-%20EMAX%202600%20-%20Cobra%202300%20-%20Rotorgeeks%202300.xlsx?dl=0\">the raw data<\/a> if anybody is interested<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Few weeks ago I ordered the Turnigy Thrust Stand and Power Analyser v2 from HobbyKing.\u00a0The initial thrust measurements were not accurate so I took it apart to discover one of the linear bearings was bad. This weekend, the bearing replacement&hellip; <a href=\"https:\/\/jaisor.net\/index.php\/2016\/04\/12\/thrust-tests-rotorgeeks-cobras-2300kv-emax-redbottoms-2600kv\/\" class=\"more-link\">Continue Reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[6,10,15,16,17,20,29,33,34,40,42],"_links":{"self":[{"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/posts\/369"}],"collection":[{"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/comments?post=369"}],"version-history":[{"count":0,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/posts\/369\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/media\/370"}],"wp:attachment":[{"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/media?parent=369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/categories?post=369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jaisor.net\/index.php\/wp-json\/wp\/v2\/tags?post=369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}