Wookong-M on a RC-Carbon 900 mm boom

[BorisS]

Hi,

since i decided to use the WK-M on my new system gonna build up the thread about it here.

Following frame:

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gonna cnc some carbon plates to mount the MC and IMU, and LED. To stay in the tower format hoping thats gonna give me enough space to mount the ESCs on the center-plate.

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Specs:

Axi 2820/14
Turnigy Plush 40A ESC
Graupner 22 mx with 35MHz Module back in
SCM 16 Graupner.
Props 12/3.8 CFK, probably switching them later.
AV 200 Photohigher temporarily mounted

 

[UAVproducts]

Boris,

Very nice.

Can you provide more information, pics and specs on the case?

Look forward to the build.

 

[MICROFOE]

It looks like some type of Pelican case. I use one for my photo equipment. They come with the foam inserts that are perforated in half inch squares and you just remove them to the shape of whatever you are going to carry.

 

[BorisS]

yes its a peli case Peli Peli 1730 WF

http://pelican.com/cases_detail.php?Case=1730

1730 Transport Case
Interior Dimensions:
34.00" x 24.00" x 12.50" (86.3 x 60.9 x 31.7 cm)

 

[BorisS]

Started with the distribution ring for the ESCs, never did something like this before and somewhat followed and copied an approach from Mactadpole. The cooper windings are isolated with self binding isolation tape and should be okay. Any concerns or did i do something wrong ?

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[Mactadpole]

Started with the distribution ring for the ESCs, never did something like this before and somewhat followed and copied an approach from Mactadpole. The cooper windings are isolated with self binding isolation tape and should be okay. Any concerns or did i do something wrong ?

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Wow! that is fancy braiding. All that extra wire is going to add some weight, is their a reason you did the braid? I also would not have made it so big in diameter but it does lend well to being able to access the plugs. I would have made it just big enough to fit inside the 4 aluminum standoffs and then used a pair of needle nose when I needed to plug and unplug (thats what I do now). I also noticed you closed the negative loop, like I said I have been told this may cause a coil effect and create noise. My rings are small which I believed helped with me not having an issue. Maybe someone with better electricity knowledge than me can chime in. Otherwise it looks very neat and i am sure it will work fine.

Shawn

 

[BorisS]

Great ! I was going to cut the negative loop, but wasn't sure yet were I will end up to attach the lipo wires. No real reason for braiding just that I didn't have any thicker cooper wire by hand and then came the idea to make it more solid and braid it. Cant move my fingers anymore . And you also right on the weight thing, i will shrink it down and make it fit exactly. Thanks for the support !

Boris

 

[BorisS]

Mounting plate for WK-M finished and distribution ring between the Centerplate. I like the fact that you cant even see it and hoping that the folding of the booms inlcuding the motor wiring inside the booms and the ring wont be a problem. At the moment its looking good.

Just found a guy 5 min walk away from my apartment with a laser cutter super happy !

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[UAVproducts]

Dist. ring is amazing!!!

 

[BorisS]

lets hope it does what its suppose to since i am using the Axi 2820/14 with current capacity to 36A, but its should be fine. Have to keep a close eye on it.

Boris

 

[Flying Tivo]

For next time you could try liquid tape for the ring! Very nice idea, i might try it myself!

Felipe

 

[BorisS]

never heard of it gonna check it out. thanks ! Do you have a product name to the liquid tape ?

Thanks

Boris

(edit) ah get it its big in the states and common.

 

[UAVproducts]

Should have shrink tubing. I'm sure its not a big deal to redo it.

What about just wrapping it with electrical tape?

 

[BorisS]

nah its fine I used (I dont know the english word), a tape that melts into itself, it becomes one and is even water proof used it several times to isolate wiring in my garden. Just liked the idea of the liquid tape.

 

[david.scarbrow]

Sounds to me as though BorisS is using self-amalgating tape.

 

[Droider]

Self amalgamating?


You can get it in different colours.. red, black, grey,brown,blue. I would use something like 10mm or 16mm electric meter tails. They are double insulated from the start so you could just cut a nick in the insulation and splice in and solder your esc feed. I would also use somthing other than deans.. maybe even solder the esc leads directly to the ring

Dave

PS nice build though boris.. aint it amazing what a crash can do ;-)

 

[BorisS]

Actually i will consider to get rid of the Deans and solder the leads directly on the ring, getting really tight between the centerplates. On the other side from my last repair experience its so much easier to change parts when the wiring can be unplugged. Up to now its still working out and since the ESCs will go on the centerplates, a couple more wires will need to be going between the plates and thats it. Lets see i would love to have to take everything apart again and redo the ring

AXIs arrived and mounted them.

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(edit) hmmm with the motors on and wires its already pretty heavy, 2.3 KG

 

[jes1111]

Did you weigh "The Ring"? To me it looks like it will be h-e-a-v-y!

You could save almost all of that weight by some creative soldering. This is a 1-to-4 splitter I made as an example, but 1-to-6 would be just as easy. Note that the pos/neg runs are twisted - helps keep EMI down, apparently.

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Why do you need plugs for each ESC? They are just another thing to go wrong mid-flight, IMO. I'll be soldering my wiring harness directly to the ESC's pads. After all, the only time you should need to disconnect them is on the workbench, right?

 

[jes1111]

Liquid electrical tape from UK: http://www.plastidip.co.uk/eStore/index.cfm?type=Domestic_Solutions/Liquid_Electrical_Tape&stage=1

 

[Mactadpole]

The liquid tape is what I use. Works very well since you can get it in all the nooks and crannies. I have been using this style ring for some time now and they work excellent.