CX WKM Build

[BorisS]

Hi Matthew,

Its a litle bit of a mess in there, because of the backlight canopy and i want to keep the motor wiring max length so the motors can be used as spares for my CS8.
The IMU is directly over the Herks and i dont have any problems.

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Boris

 

[Multirotorcraft UK]

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Here you go BorisS AeroXcraft have just put them on their site View attachment 3641View attachment 3642

 

[matthew.wright5]

Awesome thanks for the pic. For something so expensive it sure is small. Do you find you need to keep her cool? I've got a herkules heat sink coming with mine but I'm not sure how necessary it is to have it in. In running Axi 2814/22 motors and XOAR 12" carbon fibre props. I plan on lighting up my canopy from the inside too because I painted it white it should glow like a radioactive egg!

 

[BorisS]

To tell the truth I wouldnt know how to fit a heatsink in. If we are talking about a version like the custom one i made for my CS8:

View attachment 3653

But it certainly is possible to stick some RAM Heatsinks to the FETS, I wanted to do that but cutting up RAM Heatsink the the size of one FET which you have to do because between you have the soldering pads for the motors cables was to much of a hassle.

I dont have any problems heat wise concerning the Herks in the CX running KW4 which are comparable to 2218/14 axis.

Boris

 

[BorisS]

View attachment 5111
Here you go BorisS AeroXcraft have just put them on their site View attachment 5101View attachment 5102

Thanks Crison,

gonna get one in the next couple days !

Boris

 

[redridinghood]

Boris I got some Graupner 11x5 for my new CX build but I am worried if I will have enough lift on MT2814 770kv running on 4s. My estimated AUW comes to 3200g.
I see you have the Graupners on 700kv motors. Are you running them on 5S? Can you share your AUW with the mount and a gopro?

This is the test that got me worried: http://www.rcgroups.com/forums/showthread.php?t=1594904

 

[BorisS]

hmm just put mine on the scale. I have 2.5 KG with lipo 6000 4s mAh and GoPro VTX 1 Axis PH gimbal etc fully loaded. Why are you at 3.2 KG ?

Or my scale is broken

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[redridinghood]

http://www.ecalc.ch/xcoptercalc_e.h...on=100&airtemp=25&motor=tiger_motor&gear=1.10View attachment 3657

Plus 2 axis mount + plus Gopro 3d or Nex5N

 

[BorisS]

damm ecalc is not working like always even with firefox this time.

 

[BorisS]

just did it. Red I have these on the way and i will test them hopefully this week. With those you would be at 59% hover, not perfect but okay.


13 x 5 14 grams CF props http://www.aerobot.com.au/shop/all-products/51-aerobot-13x65-carbon-fiber-propeller-set-v2.html

 

[redridinghood]

Too bad... I really thought I could fly with the Graupners.

Thanks Boris

 

[BorisS]

And 13 " is max on the CX in my eyes 13 are very close to the canopy already, 14 " would go over the canopy.

 

[BorisS]

Too bad... I really thought I could fly with the Graupners.

Thanks Boris

Do something like this that would be cool. The kit to transform it into a X8 comes with the package.

View attachment 3658

8 ESCs or two herks will be very tight but doable. Would probably be lighter than 4.2 KG

 

[BorisS]

pop it up S wise and you have a killer !

 

[matthew.wright5]

13" props are def OK. I've done it. Its freaking close to the canopy, so no loose wires!!

 

[tkeeg]

Sharing my CX-4 build

Hi Guys,

I just came across this thread and thought that I would share photos and specs of my CX-4. It is equipped with the following: WK-M auto pilot system, Avroto 2814-11s motors, Graupner 11x5 electro props, 5800mAh 4 cell battery, CX-113 two axis camera mount, Sony Tx100v camera/HD video recorder, FPV camera, lipo low battery alarms, 900mHz video transmitter, custom made battery tray designed for quick battery change and adjustable balance point for swappingout different weight cameras in the front of the aircraft. Flying weight, loaded with all listed equipment is 6.5 pounds.

Video of and from the aircraft to follow soon.

Best regards,
Tom

PS: @BorisS.....GREAT job on your CX-4. Very nicely done!


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[matthew.wright5]

Hi Tkeeg,

Saw that beauty over on RCGroups. Very Nice. My all white canopy was locked in after I saw how good it looked on yours.

I have the CX-3 and Im disappointed about the location of the tilt servo. I also need to put together some sort of battery bay now I cant use my landing gear. I was looking at adapting the double battery tray available at kopterworx, or building something like yours. Can you describe your battery tray build in some more detail for us?

 

[tkeeg]

Hi Tkeeg,

Saw that beauty over on RCGroups. Very Nice. My all white canopy was locked in after I saw how good it looked on yours.

I have the CX-3 and Im disappointed about the location of the tilt servo. I also need to put together some sort of battery bay now I cant use my landing gear. I was looking at adapting the double battery tray available at kopterworx, or building something like yours. Can you describe your battery tray build in some more detail for us?

Hello Matthew and thanks for your kind words.

I did this build a few months ago so my memory may be a bit vague in some of the details. I used either 1" or 1 1/4" long aluminum standoffs with a 4-40 size thread and connected them to the frame of the CX-4 as you can see in the first photo. Getting the exact location where the standoffs would stick through the bottom canopy of the CX-4 was a bit challenging and I can't remember for sure exactly how I did it, but I was lucky enough to drill the four holes in the correct spots of the bottom canopy.
I used a piece of 1/4" plywood as the battery tray and drilled holes in it to bolt it to the aluminum standoffs, I applied industrial adhesive Velcro to the painted plywood and also to each of my batteries, then used a single long loop of Velcroto wrap around the battery tray & the battery for extra security. It is VERY strong & stable and you can easily change batteries in less than five seconds!

Tom

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[Multirotorcraft UK]

Matthew Have you considered using the POV mount at the rear to hold a large battery.

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[matthew.wright5]

Crinson you genius. Id kiss you if you werent just a line of text on my computer. Maybe you should change your name to macgyver. Brilliant stuff thanks very much. I'll definitely try it out.