Shop our Airplanes Products Drone Products Sales
Thread Tools
Aug 10, 2014, 04:31 AM
Old Flying Bastard
Kipkool's Avatar
Discussion

Brocopter Y3 : DIY mini foldable fpv tricopter.


Sup guys.

I've made this little tricopter using Autodesk Inventor 2014.
Most parts can be 3D printed.



I've published the files on Thingiverse, feel free to build yours:
http://www.thingiverse.com/thing:413639

Specs:
- 250mm motor to motor
- use 10mm carbon tubes for the arms
- 1.5mm carbon center plates
- easily foldable
- can use 6" props or even more if you make longer arms
- fits Mobius cam + 25x25 fpv cam
- anti vibe mount for mobius
- Yaw mechanics protected between the center plates ( the whole rear arm turn instead of the motor mount only )
- rock solid, easy to repair.








Yaw axis use 2 bearings (19x10x7mm) . Arms is locked between a glued endpoint and the control horn.

[IMG]https://dl.dropboxusercontent.com/u/13323558/minitri/3Dview1.jpg/IMG]



Mobius can also be put between the center plates, there's a hole under the bottom plate to access the buttons. This way you can put the fpv cam on top and tilt it a bit.



First fpv flight video after pid tunings. This little bro is pretty well locked in:

Brocopter, locked in. (5 min 14 sec)
Last edited by Kipkool; Sep 07, 2014 at 09:31 AM.
Sign up now
to remove ads between posts
Aug 10, 2014, 04:32 AM
Old Flying Bastard
Kipkool's Avatar
Here is a test of the yaw mechanics, smooth, no plays , lot of torque:

Brocopter Yaw test. (0 min 54 sec)
Last edited by Kipkool; Aug 10, 2014 at 04:40 AM.
Aug 10, 2014, 04:33 AM
Old Flying Bastard
Kipkool's Avatar
First tryout after tuning quickly pids :

Brocopter tryout (1 min 49 sec)


Actual setup of first proto is:
- 1806 rctimer 2300kv
- Kiss ESC 12A
- MKS DS450 micro servo (9.5g).
- CC3D flight controller running Taulabs.
Last edited by Kipkool; Aug 10, 2014 at 05:06 PM.
Aug 10, 2014, 09:00 AM
Registered User
PiperWipo's Avatar
Nice! What is the weight of this frame?
Aug 10, 2014, 11:02 AM
Old Flying Bastard
Kipkool's Avatar
Thanks,

367g fully stuffed without battery.
This includes 3 motors, servo , esc, fc, mobius + fpv cam, video tx & wires.

lipo 1300 3S weight 104g.

The plates are still 3D printed, will probably be a bit less when I'll cut the CF ones.
Last edited by Kipkool; Aug 10, 2014 at 04:34 PM.
Aug 11, 2014, 03:47 AM
Old Flying Bastard
Kipkool's Avatar
There's no good fpv frame without a good solidity test.

Brocopter solidity test... (0 min 6 sec)


Tri have nothing but broken props. Ceiling totally messed up... )
Aug 11, 2014, 03:59 AM
Multirotor Bloodhound
Shufty's Avatar
Quote:
Originally Posted by Kipkool
There's no good fpv frame without a good solidity test.

https://www.youtube.com/watch?v=CSiS...ature=youtu.be

Tri have nothing but broken props. Ceiling totally messed up... )
Hahaha that was awesome!
Aug 11, 2014, 05:18 AM
Old Flying Bastard
Kipkool's Avatar
we can say there's enough power with 6" props
Aug 11, 2014, 06:29 AM
Registered User
I will suggest you to include anti-vibration mount for Mobius, You might have a lot of jello without one.
Aug 11, 2014, 06:56 AM
Old Flying Bastard
Kipkool's Avatar
mhhh, have you checked the pics ? there' already an anti jello mount for mobius I've made for this frame.

It's also written on the specs on the first post, and on thingiverse, dunno what to do more to make it more evident
Aug 12, 2014, 04:15 AM
Registered User
Hi,

I'm sorry didn't see carefully, I need new pair of glasses for sure !




Quote:
Originally Posted by Kipkool
mhhh, have you checked the pics ? there' already an anti jello mount for mobius I've made for this frame.

It's also written on the specs on the first post, and on thingiverse, dunno what to do more to make it more evident
Aug 12, 2014, 07:14 AM
Old Flying Bastard
Kipkool's Avatar
Here are some 3D views to understand more easily how everything fits together.
This should help

The little part on the rear arm in blue is the endstop. It needs to be glued to the arm after instertion:


Then put the control horn touching the bearing to lock the arm horizontally. Grey parts are te 2 bearings ( 19x10x7mm )


Glue some M3 nuts inside the front arm mounts. You can see there's oles for that. They will be use to lock the arm once unfolded.


Aug 12, 2014, 09:52 AM
CAD/3D Printing - FPV Racing
brannnt's Avatar
Nice looking build!

How are you attaching the motor mounts to the CF tubes?
Aug 12, 2014, 10:08 AM
Old Flying Bastard
Kipkool's Avatar
friction only. Far sufficient considering the size.I add one turn of tape to add more frictions, it's really hard to move it manually after.

It also act a bit as fuse in case of crash motor mounts will turn abosrbing a part of the hit.
Second fuse is the little screw to lock the arm once unfolded, if you use a nylon one.
Aug 12, 2014, 02:45 PM
Registered User
thefokker's Avatar
Fantastic work!!!!