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Old Feb 07, 2012, 09:48 AM
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Geneva, Switzerland
Joined Jan 2009
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X468HD X8 DJI Wookong M

Hi guys,

Here are some pics of my current build, an heavy lifter X8 based on the X468HD frame, with the DJI Wookong M.

I'm using X468 boom blocks and motor mounts, and the medium camera mount.
Motors are MT2814-11 (710Kv) and they will swing some 12x4.5 props.

Distance motor to motor is 740mm.

I'm currently waiting on the last 2 motors and the ESC's and will update the thread when I've new pics.
---------
EDIT 02.07.12:
Added some pics with the two missing motors and the cover.
GPS has been moved to an arm.
Still wainting on ESC's, the last missing parts before the maiden flight!

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EDIT 03.10.12:
Finally got the stuff I was waiting for, so I posted some new pics at the end.
Too much wind here those days, so the maiden is reported a bit... but I'll post a video when done.

The camera will be operate by a second person and there will be a video downlink, still need to had it.

I want to tweak the beast and have it flying as needed before puting all the stuff on...

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EDIT 04.07.12:

Check this post.

New pics at the end, too.

Center plates:



Motors on blocks (MT2814-11, 710Kv), Outrage 550 booms (21mm diam.)














Distribution board from Flyduino:






Copper plate under the IMU:




































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Last edited by helicoblast; Apr 07, 2012 at 08:30 AM. Reason: new pics added
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Old Mar 13, 2012, 07:11 PM
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Calgary Canada
Joined Jun 2006
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hi there, looking good, I am also planning an x8 build... please let us know how it flies!

steve
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Old Mar 14, 2012, 12:02 PM
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Geneva, Switzerland
Joined Jan 2009
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Hi Steeve,

Here's the maiden, it was a bit gusty but I'm really pleased so far:

Maiden flight X8 X468HD (3 min 57 sec)
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Old Mar 30, 2012, 11:38 AM
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Calgary Canada
Joined Jun 2006
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how is this going?

I am still very unsure what to build... a hexa or a octo...

how are your flight times with the co-axial?
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Old Mar 30, 2012, 12:12 PM
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Geneva, Switzerland
Joined Jan 2009
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It's going on...

Seriously, there is still some work to do.
I just made a quick test in the wind today, it behaves really good, was holding position in GPS mode pretty nice. The copter weighs 4.5Kg, so it's an heavy machine, and that surely helps in the wind.

It's flying fine but I think I'll need to try different props and combinations to reduce vibrations and help stabilizing the flights. I'm actually using 12x4.5 gemfan but I'm thinking to switch to APC 12x3.8 for upper motors and 11x6 for lower motors.
There's a common knowledge that lower props need to be smaller with more pitch to be efficient. I'll try.

I also swapped the gimbal to an AV130 because the previous one was too floppy, but it still needs improvments.

Flight times with 2x 4S 5000Mah is around 8 min in hover.

The coaxial setup seems to handle better in the wind than flat setup.
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Old Mar 30, 2012, 12:17 PM
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Calgary Canada
Joined Jun 2006
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yes I agree the coxials always do better in wind... but at the cost of efficiency.

thanks for the info and update!

as for props those gemfan props are NFG in my opinion, I bought lots of them and they are just no good for heavy applications, I think you would find that putting some 11x6 graupners on there will smooth everything out.

good luck and keep posting this is a nice build.

steve
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Old Apr 07, 2012, 08:21 AM
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Geneva, Switzerland
Joined Jan 2009
807 Posts
Some changes since the last update

The X468 medium camera mount was too floppy for the NEX-5, so I changed it to an AV130. I did some modifications to the frame to fit the AV130 and it now works as well.

I had some vibrations I did not get rid off, until I changed the propellers. I swapped the 12x4.5 Gemfan for some APC 13x6.5 and what a difference!
No more vibrations, the copter seems to have more power and flight time has slightly increased, I'm actually flying 8 min with spare power, so it's 1 min more than before.

I will post a video on the next days.
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Last edited by helicoblast; Apr 07, 2012 at 08:32 AM.
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Old Apr 04, 2013, 09:39 PM
2jz
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Joined Mar 2013
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Hey guy i'm seriously in need of help, i want to mate the cine star 2 axis gimbal to my S800 .....what do i need and where do i get what i need? or are there any other gimbals that produce better stability?
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