{"id":507,"date":"2012-12-09T23:34:27","date_gmt":"2012-12-09T22:34:27","guid":{"rendered":"http:\/\/majek.mamy.to\/?p=507"},"modified":"2013-06-10T01:20:59","modified_gmt":"2013-06-09T23:20:59","slug":"tricopter","status":"publish","type":"post","link":"https:\/\/majek.sh\/en\/tricopter\/","title":{"rendered":"Tricopter"},"content":{"rendered":"

On one happy day Santa Claus came into my home and brought me some parts to make the Tricopter \ud83d\ude42<\/p>\n

Since I saw detailed build log of David’s Tricopter<\/a> I started to think about having one:-) Not about quadcopter, hexacopter of other kind of -copter, but it had to be folding tricopter. Meantime I collected few useful small and handy parts, so only most impotant (and costly) parts left to buy. And now arrived: motors, ESCs, props and servos (but in buget version).<\/p>\n

So, let’s start building \ud83d\ude42<\/p>\n

Update 2013.06.10<\/strong>: I made some errors and bad decisions during this build, please read short summary<\/a> before you follow this build log.<\/p>\n

Tail servo<\/h2>\n

At the beginning look at my new servo: HK15148B Digital Servo<\/a>.
\n\"\"<\/a>
\nI hope that it’s not too weak, because David used stronger one.<\/p>\n

Looks nice, but if you looked at Rcexplorer’s build log, you should notice that this servo should lay on it’s left side. And there is a first problem: on the left side there is a cable output.
\nSo let’s look what we can do with it:
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\nLooks promising \ud83d\ude42
\nI made a hole on bottom part of servo for new cable output:
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\nbend cable to the bottom of servo and assembled it that way.
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\nCut handle and servo is ready:
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Yaw mechanism\/cradle.<\/h2>\n

Servo should sway tail motor to make yaw work.
\nI got one X servo’s arm and increase inner hole to 4mm:
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Now I could put a M4 screw through servo arm and one piece of wheel mount<\/a> and glue it together using epoxy. Of course before glueing I sanded both adjoining surfaces. Trick with screw is for centering both pieces.
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After epoxy cured, I drilled 1.5mm holes for small screws (probably I have it from other HXT micro servos). Next, I increased holes only in arm part to 2mm (by drilling \ud83d\ude42 ).
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Next step was to cut excessive parts and one part of sway mechanism is ready:
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I decided to make this part a little other way than in original Tri because I didn’t have 4mm carbon fiber rod. Hole in part of wheel mount is about 3.95mm, so I drilled it once again using stock 4mm drill (only part connected with servo arm!), so screw inside this part will be a little more loose. Having weight in my mind, I replaced steel screw with nylon one and put two parts together:
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\nNylon screw could be secured by a drop of CA on the head side (it shouldn’t move there).<\/p>\n

Tail cradle finished (almost – wait for bad suprise further):
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Frame<\/h2>\n

Center plate of frame should be made from glass fiber. I found im my stuff only plates coated with copper (to make printed circuit boards), so I used them. It will weight a little more, but for my first copter I think that it won’t matter.
\nI printed template from David’s site and started to cut things:-)
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Because I don’t have a CNC machine, I thought at first about ‘coffin’ shape, but with little effort it is possible to cut much better shape only with hack-saw.
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\n\"\"<\/a><\/p>\n

Lucky for me, at this point I switched to making arms. It occured that I bought 12×12 pinewood sticks instead of 10×10…
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So some holes had to be moved to all parts fit together.
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Frame assembly – rember to use thread locker for every nut! I used blue one: HK-171 Thread Locker (blue)<\/a>. I also used only M3 screws as I didn’t have any M2.5.
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\n\"\"<\/a><\/p>\n

Tail<\/h2>\n

It’s time to mount some hardware:-)
\nFew zip-ties and it looks very promising:
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But it only looked that. While I was trying to mount a motor, it occured that there is not enough room for two mounting zip-ties. So I had to use Dremel with 1.5mm drill and make some space for it.
\n\"\"<\/a><\/p>\n

And this was my failure – making holes could be much easier if it was done before mounting everything. But I use another motors, so mounting is also different and I couldn’t predict it. In fact it looked ok during test fitting.
\nBack to the pictures:
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\n\"\"<\/a><\/p>\n

Motors<\/h2>\n

And finally time was come for motors. I bought 2213N 800Kv brushless motors<\/a> for this tricopter. I thought about original hexTronik DT750<\/a> but that time was unavailable (and it costs few $ more).
\nAnyway, to mount this motor to tail 4 zip-ties could be used:
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\n\"\"<\/a><\/p>\n

Mounted prop saver<\/a> on motor shaft. Of course, nuts should be also secured using thread locker.
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Zip-ties on other arms:
\n\"\"<\/a><\/p>\n

And all motors mounted:
\n\"\"<\/a><\/p>\n

After 2 days of work:
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to be continued…<\/p>","protected":false},"excerpt":{"rendered":"

On one happy day Santa Claus came into my home and brought me some parts to make the Tricopter \ud83d\ude42 Since I saw detailed build log of David’s Tricopter I started to think about having one:-) Not about quadcopter, hexacopter …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[24,11,31,13,42],"_links":{"self":[{"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/posts\/507"}],"collection":[{"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/comments?post=507"}],"version-history":[{"count":51,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/posts\/507\/revisions"}],"predecessor-version":[{"id":1190,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/posts\/507\/revisions\/1190"}],"wp:attachment":[{"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/media?parent=507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/categories?post=507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/majek.sh\/en\/wp-json\/wp\/v2\/tags?post=507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}