Quark - Sub Atomic

By imclinden on Apr 10, 2021

17  765  10

The quark – a purple 40mm GnarlyFPV Sub Atomic.


Build follows the GnarlyFPV Sub Atomic reccomended electronics list, with deviations in bold, below.

  • JHEMCU GHF13AIO 16x16 FC & ESC
  • BetaFPV 1102 13500kv
  • Runcam Nano 4
  • TBS Unify 32 Nano VTX
  • Frsky XM+ Rx
  • 16x16mm VTX / Rx Sled
  • Foxeer Micro Lollipop
  • 350mah 2 HV lipo

Build Notes:

I wanted to mount the VTX and Rx to a 16x16 combination sled, to save on wiring compelxity and clean up the stack. I needed to swap the stock M2x11mm stack screws for M2x14mm, and then the stack fit happily.

The BetaFPV 1102 13500kV motors were stupid difficult to locate - I kept tabs on a number of sites for a few weeks and was finally able to snag a set. I don't know if the 18000kV variants that are more readily in stock would work, but I'm hearing good things about the T-Motor F1103 10,000kV motors.

To route the Rx antennas I had to remove the stock yellow goo, change the attachment angle, and then add drop of flexible adhesive. I'll probably end up moving the Rx antenna to the arms, but I was out of zip ties.

I flashed the ESCs with 48 KHz JESC and RPM filtering.

The complete build is just shy of 44 grams dry, and 66 grams with a 2S 350 mAh.



Sign in to comment

MakeitHappen   23 days ago  

Clean build. If VTX pad shown in diagram is battery voltage, which pad did you use for 5v for vtx and 5v for camera? Double checking to avoid any smoking magic. Avoiding any newb mistakes. Thank you!

imclinden   23 days ago 

On the front face of the controller there are two voltage positive pins - a BAT and 5V pin. I ended up soldering both the camera and VTX to the 5V pin because my vtx board was also powering the Rx.

MakeitHappen   13 days ago 

Thank you. I ended up using Power for camera from VTX. Seems like a cleaner video. So far so good, flies nice. Just need to learn to tune better.

rsheldiii   28 days ago  

Great build! That little sled is fantastic, I might have to pick one of those up. Did you mount the receiver antennas to anything?

daich   Apr 14, 2021  

yeah the T-Motor F1103 are nice. I've had 3x 10,000kv sets that I've run on 3s with 2.5" props without throttle cut. They are absolute beasts. They have huge bearings for their size motors, bigger than all the 1103 size motors that I know. for this reason they are super smooth BUT they are very heavy, more heavy than the average 1103 and much heavier than the lightest of those, like the skystars 1103 which are power and super light.
Also the F1103 have an issue with the shaft separating from the bells. I have three sets of them bought at various times from different places and four of the motors have developed a loose shaft which is quite sad as they are favourite flying 1103s. I have a feeling there might have been a bad batch or two with bad gluing of the bells

imclinden   Apr 14, 2021 

These 1102s have been a treat so far - I'm glad they shipped the "upgraded" bearing model, I was worried about longevity of the V1 bushing. Gnarly's recommendation was spot on , and I'm happy to have the weight savings

Jodie Froster   Apr 11, 2021  

Where yaa gonna put your battery strap? Round' the outside?

imclinden   Apr 11, 2021 

There's just enough room between the top plate and the Rx for a slim strap. But I can always ditch the M2 nuts between the FC and VTX sled for an extra mm, if things get tight.

Jodie Froster   Apr 11, 2021 

I was looking at those extra m3 nuts, but it looks to me (and obviously also to you) like they are necessary currently. I suppose you could put something between the FC and the radio mounting board to prevent shorts and drop the extra spacer nut. It also looks like you have space for the strap under the FC for a bottom mount battery. There is another Sub Atomic that got posted about the same time as yours that has the raidio gear heat shrinked and didn't use the mounting board. I have to say i'm surprised that it's the more space effeciant option, I love that mounting board so much (and it's reccomened for the frame, from the maufacturer, right?)! It's like we're in the negaverse

imclinden   Apr 11, 2021 

I'm using a non-gummy strap that fits fine. But I think that a piece of kapton and swapping the spacer nuts for washers would buy just enough space for a gummy strap.

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