Micro H-Quadcopter

by ukarmy04, published

Micro H-Quadcopter by ukarmy04 Feb 25, 2013


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This is my second revision of the micro h-quadcopter I have been designing. I've made a few modifications in order to improve the rigidity and durability of the frame. The arms are still angled outwards at 25 degrees in order to take on loads more axially in a crash. The motor holes are designed for the Turnigy 2900KV motors and the controller board posts are designed for 50mm boards with 45mm hole spacing.

You can find a build log of this quadcopter on my website:

A brief overview and some flight footage of the quadcopter can be found here:

Also, flight footage of KapteinKuk using this frame design:

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Thanks for the heads up! I've updated the link and it should now be working.

could you please write some stuff specs? propellers dimensions, flight weight and Li-Po used?
great work btw

Would this be able to handle an addition of a camera and transmitter? I know absolutely nothing about quads, but I really want to get into FPV racing. This seems like a cool entry level project to do!

im almost done building one of these... itll be my first quad. looking forward to learning how to fly it.

Can anyone tell me spacing for the motor mounting points? Have some extra rcx 1804s and theirs are 12 mm. Would love to use them if anyone can help.

Really nice Frame, good work!
Is it possible to release a Version with 30.5mm Hole Spacing ? Would be very nice for Naze32 FC :)
(I´ve tried it a couple of times, but i don´t cope with Inventor Fusion ..)

Can this be printed on a Makerbot2x? I loaded the file and it said it needed to resize for the machine.

Well, just looked at the spec of the makerbot. It shows [9.7 x 6.0 x 6.1 in]build area. Guess it's 1" to short.

I believe someone made a remix of this frame that could be printed on smaller printers. The files should be here on Thingiverse

What radio controller setup do you use?

  1. Just bought my Turnigy Micro Quad..


  1. Buildt it, flew it crashed it.

  2. Printed this:

Layer height: 0.2mm

Shell thickness: 0.6mm

Bottom / Top Thickness: 1mm

Fill density: 15%

Speed: 75

Time: 1h 40 minutes

  1. Drilled the hole 2mm all the way on the arm mounts so i could use zipties on the motors.

  2. Drilled 4 holes (3mm) under to fit the legs from the micro quad.

  3. much better and stable frame. Hovers easily! Thanks

Result? Speedy bastard.. :)

Step 2 also included "broke" it? I see the price comparison for individual parts to the kit you mentioned is very close, within a couple of dollars. Basically you get it assembled on the frame?

Late reply, i bought the kit not planning to print this one. I flew it and the whole frame was destroyed. So i had to either buy a new or print ;)

Love this lil guy!

Printed at 2 outside layers, 3 top/bottom layers, and 40% infill. Ended up hitting a tree and snapped an arm. I'm re-printing now w/ 3 outside, and 60% infill. lets see what happens.

Very nice! Your build looks very clean and that 3S battery must give you a lot of power.

Got the 'copter assembled and the receiver test on the KK2 says the transmitter is talking to it. But the motors won't spin up even at full throttle. The motors do pulse at a 1s interval during receiver test so they are getting power. Is there an "engine start" button I am missing?

Very nice design! I saw KapteinKuk's print of this. You are doing a good job when someone like him says good things about your work.
I just loaded the model into MakerWare, and it seems that as provided the model is too big to fit on the MakerBot Replicator 2 bed. Is this what you would expect? I'm printing it now (using "fit to maximum size") and am going to measure how far off the size is.

Thanks! Yeah, the overall dimensions are supposed to be ~6.3" x ~6". Right now I'm printing these on my friends Printrbot and he can fit the entire frame on the print bed. There should be a remix of this frame on thingiverse that can be split into four smaller segments and printed on smaller printers.

Might sound silly, but how did you get the props you mention on your parts page to fit on the Turnigy 1800/2900kV motors ? The props hole are really, really too small as far as I can tell.

Yep that's exactly right. The prop holes are way too small for them to be tension fit without modification. I used a small file to ream out the center of the prop hole until it was just big enough to tension fit. It was pretty difficult to consistently reproduce good results, though.

I'll have to figure this out too then :) Getting a file or drill bit smaller than 2mm will not be a trivial task. HobbyKing comments suggest to use a 5/64" (1.9844mm) drillbit, but I have no clue on where I could get that in France (metric system). Thanks !

Can you provide the KK2 Settings and are you running the latest 1.5 firmware?

I think I was using 1.4 when I built this quad and my settings can be found here:


I just built the frame and it looks great. Ordered the parts from HobbyKing and now the waiting begins... I used PLA with a 25% infill and it seems very strong yet lightweight.

Good to hear. Yeah, 25% infill should be more than enough for a quadcopter this small.

Which print parameters (infill, solid layers, perimeters) did you use to print this model.
Thanks - Guhl

Nice! Looks much tidier then my 3D quadrocopter :-)