Sunday, September 7, 2014

Improve frame drag in FFWD

I'v always reach a kind of speed limit with my miniquads above 70-80km/h. Probably because of the frame beeing so tilted that it create too much drag.

William from Schrediquette project made some wind tunnel test using tilted motors, and results are promising.

I've made some 3D printed mounts for the Pocket Rocket, you can download them on Thingiverse

This also help to see other thing than the grass when you're going fast.

First test yesterday, and I confirm, this is really promising.
Also, those 6x4.5 props are strong drug.

Thursday, August 28, 2014

Tricopter maiden

First fpv tryout of the printed tricopter showed in previous article.

PID were tuned using newautotune Taulabs feature from Peabody124.
I haven't touched anything and it almost give me really good settings.

Brocopter Y3 250, first maiden.

I still can improve the behavior.

Wednesday, August 27, 2014

Brocopter Y3: 3D printed mini foldable tricopter

So I've bought a 3D printer this summer, best hobby investment I've ever done so far.

To celebrate that I've decided to draw a mini tricopter. But I didn't want to have the yaw mechanic at the tail end.
After many different draws & simulation on Autodesk Inventor 2014 (top notch tool for that task), I've ended with a double ball bearing boom tail.

Here is the 3D assembly of the different parts

Center plates are cut on 1.5mm carbon fiber plates and total weight is under 100g. Weight can still be improved, I will try different filling rate later.

The tricopter have 3x 12A Kiss Esc from Flyduino. I've made a little piece to fill them all tightly and organise power distribution:

Then this plate is sticked to a CC3D case for the flight controller. It's a remix of the official one, using less height. You can find it on the Thingiverse page of this project.

The little black cube on the left is a 5V voltage regulator ( Recom 1A) for powering FC, servo & radio Rx.

It's now time to assemble  all the parts. I've mounted everything hanging up from the top plate. This way I can access the Esc wires, etc by just removing the bottom plate.

Flight controller is protected from water and dust. There's only holes for the servo connectors.

And here is the beast ready to fly:

Once folded

In the air

I've published all the needed STL and DXF to  Thingiverse.
There's also the RCGroups thread that should bring you more informations if you want to make one.

If some peoples are interested, I can have some center plates or complete kit with printed parts. 
Send me a message directly.

Videos are coming. :)

Sunday, May 11, 2014

Some fpv fun with 250 Pocket Rocket

Seems I've finally found the perfect combo for my 250 H-quad.
SunnySky 2204 2300KV with 6x3 props & 1800mA 3S gives me 8mn flight times with plenty enough pops for fun flying.

Frame is Pocket Rocket from ReadError with exended arms for 6" props.
Really nice little toy so far. :)

Treelanding from KipK on Vimeo.

little rocket in the pocket from KipK on Vimeo.

Tuesday, April 22, 2014

3DR cat & mouse play

Yesterday Mission Planner devs had fall back and removed bad otp check that prevent to upload firmware with homebrew boards.
This morning, the protection is back in their git.
WTF is happening in their head, don't they understand this completely deserve their purpose?

Anyway, this fake Open Source mind is tiring me.
I've forked Mission Planner on my github and will maintain a no otp version until they change their attitude on this.

Here is the fork:

and up to date binaries will be maintained here

Please 3DR guys,open your mind, respect open source spirit, improve your communication & marketing skills. Bad buzz is always a no go in business.

Sunday, April 20, 2014

Update non 3DR pixhawk using Mission Planner

Edit: Outdated, they've added a new check on MissionPlanner executable.
Grab the forked Mission Planner here:

After the tools posted yesterday, here is another trick.

I was looking in MP sources where's the otp restriction was hidden, in fact this is closed in a binary blob called pix4uploader.exe and source are not provided ( or have I missed'em? ).
I had to rollback to MP 1.2.74 to find one that works.

edit: outdated Download this here  and extract it in the Mission Planner directory.

Then you can use MP to update your clonehawk

Friday, April 18, 2014

Bypass new 3DR OTP "protection" on homebrew Pixhawk clone

Lot of flaming on forums those days about new 3DR OTP policy on mission planner.

To summarize the story, now you can't upgrade your pixhawk clone firmware from Mission Planner anymore. You will get an "OTP error" when trying to upload.
Only legit boards from 3DR works.

Considering this is an open source hardware & software, I don't get the move here.

Anyway, don't cry, there's an easy way to remove your pain.
You can upgrade your board using QUpgrade tool.

 Off course, for whatever reason, all qupgrade binaries have been removed from 3DR/PIX4 website.

You can still find the source from github here.
This compiles with QTeditor.
I've compiled a windows & mac binaries here: QUpgrade tool

With all the fuzz on this, I think they will change their position and make the things different quickly.


In home screen select correct firmware and hit Flash Now button:

FIXED: The Flash Now button in home screen doesn't work,  links have changed on the website. I'll try to fix that. You need to  manually grab the latest firmware following this:

To manually download & flash other builds follow this:

scroll down to All APM Firmware Options
go to stable or latest for current dev branch
Choose correct firmware
Most clones are v2
With latest firmware you don't need to unplug your board, just let it going, board will reset itself.
If not unplug it click ok, plug again.