{"id":2908,"date":"2021-02-20T11:26:00","date_gmt":"2021-02-20T09:26:00","guid":{"rendered":"http:\/\/dima.fi\/blog\/?p=2908"},"modified":"2021-03-08T21:54:55","modified_gmt":"2021-03-08T19:54:55","slug":"ac4","status":"publish","type":"post","link":"https:\/\/dima.fi\/blog\/ac4\/","title":{"rendered":"AC4 &#8211; a bit different quad"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"893\" height=\"670\" src=\"http:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-frame.jpg\" alt=\"\" class=\"wp-image-2909\" srcset=\"https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-frame.jpg 893w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-frame-300x225.jpg 300w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-frame-768x576.jpg 768w\" sizes=\"auto, (max-width: 893px) 100vw, 893px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>I have been watching a new DJI Mini 2 quad. Especially its motors and props. Thinking that DJI can optimise motor and prop combination for efficiency. Mini 2 specs say 30min flight time and people got 25min. Still good result for 250g drone with 2S battery. I got curious if I could build a lighter drone with the same motors, could I get an even longer flight time?<br>I thought, that my <a href=\"https:\/\/dima.fi\/fpv\/anticrime\/\" target=\"_blank\" rel=\"noreferrer noopener\">AC3<\/a> would be the last project, but couldn&#8217;t resist sketching several versions and ended up with this design.<\/p>\n\n\n\n<p>This quad is intended to be sub 250g, with 4k HD on board and with long range capability. <\/p>\n\n\n\n<p>See more info on the build and part list on <a rel=\"noreferrer noopener\" href=\"https:\/\/rotorbuilds.com\/build\/26388\" target=\"_blank\">Rotorbuilds.com\/build\/26388<\/a><\/p>\n\n\n\n<p><strong>Update 7.3.2021:<\/strong> Arms cause motor vibration around their twist axis. So they need to be redesigned. See video below. Developing continues.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Developing AC4 - 214g 2S HD LR quad 34min flight time - Part 1\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/gDYjIjrLArg?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>\n<\/div><figcaption>Part 1 video of the developing this quad<\/figcaption><\/figure>\n\n\n\n<p>If you are interested in this frame, don&#8217;t hesitate to contact me. I&#8217;ll consider to put it on sale at <a href=\"https:\/\/droneit.se\/\" target=\"_blank\" rel=\"noreferrer noopener\">Droneit.se shop<\/a>.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1848\" height=\"1844\" src=\"http:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited.jpg\" alt=\"\" class=\"wp-image-2926\" srcset=\"https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited.jpg 1848w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-300x300.jpg 300w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-1024x1022.jpg 1024w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-150x150.jpg 150w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-768x766.jpg 768w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-1536x1533.jpg 1536w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/IMG_20210223_030145-edited-600x600.jpg 600w\" sizes=\"auto, (max-width: 1848px) 100vw, 1848px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Specs<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-top-plate-edited-1.jpg\" alt=\"\" class=\"wp-image-2918\" width=\"310\" height=\"310\" srcset=\"https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-top-plate-edited-1.jpg 573w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-top-plate-edited-1-300x300.jpg 300w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-top-plate-edited-1-150x150.jpg 150w\" sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Top plate<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>2mm<\/li><li>Two 20&#215;20 slots in the front and the rear<\/li><li>Twist-lock v2 hole for HD camera mounts<\/li><li>Battery strap slots for 15mm wide strap<\/li><li>Big hole at the front part for the power lead<\/li><\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-bottom-plate-edited.jpg\" alt=\"\" class=\"wp-image-2920\" width=\"291\" height=\"290\" srcset=\"https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-bottom-plate-edited.jpg 536w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-bottom-plate-edited-300x300.jpg 300w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-bottom-plate-edited-150x150.jpg 150w\" sizes=\"auto, (max-width: 291px) 100vw, 291px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Bottom plate<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>2mm<\/li><li>25.5&#215;25.5 holes for AIO Toothpick FC<\/li><li>20&#215;20 slot ends for centre FC+ESC stack<\/li><li>One 20&#215;20 slot in the rear<\/li><li>Twist-lock v2 hole for something<\/li><\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-arms-edited.jpg\" alt=\"\" class=\"wp-image-2922\" width=\"304\" height=\"303\" srcset=\"https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-arms-edited.jpg 661w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-arms-edited-300x300.jpg 300w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-arms-edited-150x150.jpg 150w, https:\/\/dima.fi\/blog\/wp-content\/uploads\/2021\/02\/AC4-sep2-v13-arms-edited-600x600.jpg 600w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Arms<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>3mm<\/li><li>2mm at the tips for motors<\/li><li>Front arm is straght<\/li><li>Rear arm is 90\u00b0 boomerang<\/li><li>3mm holes for mounting to the bottom plate<br><strong>Attention! Arms are under redesigning. So the new versions are coming.<\/strong><\/li><\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Hardware<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>4x 4x20mm standoffs<\/li><li>8x M2 6mm hex screws<\/li><li>4x M3 10mm hex screws<\/li><li>4x M3 lock nuts<\/li><\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">3D printed parts<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Nano camera mount<\/li><li>TBS Immortal or FrSky R9 T-antenna front mount<\/li><li>Combined mount for TBS Unify pro32 nano, antenna and Beitian BN-220 gps module<\/li><\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>My new project: AC4 -sub 250g, 4k HD camera,  Long-range drone with DJI motors and props<\/p>\n","protected":false},"author":1,"featured_media":2909,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[176],"tags":[224,225],"class_list":["post-2908","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-anticrime","tag-drone","has-thumbnail"],"_links":{"self":[{"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/posts\/2908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/comments?post=2908"}],"version-history":[{"count":7,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/posts\/2908\/revisions"}],"predecessor-version":[{"id":2930,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/posts\/2908\/revisions\/2930"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/media\/2909"}],"wp:attachment":[{"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/media?parent=2908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/categories?post=2908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dima.fi\/blog\/wp-json\/wp\/v2\/tags?post=2908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}