I would like to start a new multirotor project. I would like to start a Coax Copter project for myself.
I've done some research on the internet. This is what I've found about coax copter. I would like to share this with you.
Images
Links
http://copter.ardupilot.com/wiki/singlecopter-and-coaxcopter/
[APM Single and coax copter wiki page]
http://www.robotshop.com/blog/en/skybotix-coax-autonomous-micro-helicopter-drone-250
[Optical Mouse sensor for hovering - Video on the page]
http://hackaday.com/2014/12/16/uav-coaxial-copter-uses-unique-drive-mechanism/
[Only to motors, no servo - Video on the page]
https://pixhawk.ethz.ch/micro_air_vehicle/coax
[They talk about their coax project. But there is only a single image on the page]
http://diydrones.com/forum/topics/my-new-coaxial-copter-project-imperial-probe-droid
[Someone here tried to build a single motor coax copter]
http://s263.photobucket.com/user/EQMOD/media/sub/ufobeam1.jpg.html
[???]
Suggestion/Question
-Does anyone have started any coaxcopter project?
-Any suggestion for the frame? Does anyone have any 3D file that I can use to print it?
-I see on the wiki that the firmware for the coax copter is still in an early stage. What kind of precaution I should use when I try it?
Comments
Hey out there
The subject of Coax copters has been bouncing around in my head for sometime.
Wondering if anyone can steer me towards any documentation that speaks to how to compile the code to support the Coax format of copters. I see links about how to connect to apm or pixhawk but nothing so far on compiling the code. I am not worried about the build, that's the easy part for me ish
Hi
Ok thanks
do you have a direct link to the firmware for kk flight control board because there are many.
I do not know which one to take.
thanks
PS: But probabily you need some programming skill to complete the firmware works on PixHawk/APM. I think that the actual version is not very complete. (IMHO)
All my tests was done with KK Flight Control Board.
I can not procede in the next stage due to problem to finish my frame in a correct way.
But in the future I also wish to procede to try Pixhawk.
Here there are the original page from the wiki:
http://copter.ardupilot.com/wiki/singlecopter-and-coaxcopter/#load_...
They write this:
Load the Firmware
It seems that you only neeed to compile by yourself the code, and you need to add the frame confing code line in config.h.
I hope that this comment could help.
Hi mens
I'm on the same type of project you already since several years.
I started by oversizing such drone CoaxCopter: engine, propeller, structure, power, battery, autonomy, according to my specifications.
I started the design of the 3D structure.
For electronics, I thought fully develop the firmware on a base dsPIC. This is partly done.
My IMU (inertial mesurement unit) works. I have the pitch angle, roll and yaw values via UART.
Drone management is yet to be tested.
The drone is controlled via a standard remote control.
But according to the website, the drone could be controlled with Pixhawk. But I can not find info on the firmware.
Is it available? The information is contradictory.
Ludo
Yep
I think its the best way to prove your config due to the ease of tuning and fast setup
Thx. Have you tried both 1m 4s and coax on the KK2 ?
Thx. Which autopilot have you been using ?
Single copters can be exceptionally stable (T-hawk for example) , and lets not forget that even coaxial copters are most certainly not intrinsically stable in yaw.
Generally single copters require a lot more engineering to fly properly, due to the high degree of necessary displaced air for control correction which requires louvers instead of simple single vane control surfaces in most cases.
Most single copters that fly poorly also have the CG at or below the propeller as well, which is detrimental to general stability unless you have enormous control surfaces.
In my opinion it is a much better idea to build a single copter if you are willing to put in the time to really get the control down. I have just finished one now with 3d printed louvers (2 for each of the four servos) that is incredibly stable.
The efficiency and much improved intrinsic safety of these two configurations makes them a really attractive choice once you get the dynamics of them figured out either way.
Coax copters are also neat, but tend to be a lot taller which makes them ill suited for my applications. That being said the two I have built flew fantastically and were much easier to get flying the way I wanted.
Some great single copter and coax copter info:
https://www.youtube.com/watch?v=IvAToG7GZPU
Beautifully maneuverable and stable single copter:
https://www.youtube.com/watch?v=Q7-X4hFmGQM
another excellent single copter:
https://www.youtube.com/watch?v=sBvmhWAXGe8
Really nice coax copter:
https://www.youtube.com/watch?v=8bNXXGGFESw
Another coax copter:
https://www.youtube.com/watch?v=WXCp1lPKFVY