Sub 250 Gram Pixracer Build - Parts

Posted by Edgar Scott on April 12, 2016 at 6:11am

Since my Sub 250 gram pixracer is complete I thought I would share a parts list and some build pics.

The FC is a small 36x36 Pixhawk based, its capable of full autonomous waypoint flights, ACRO, has 5.8 GHZ Video, I added an inline DVR for doing real time recording. It even has a Wifi module for telemetry over Wifi. All in a small package that does not need registration.

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I recently moved all the GPS and Video Tx inside to protect against damage in a crash
Also added aluminum standoffs for strength and moved the battery to the top.

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Frame:  http://www.banggood.com/Diatone-Blade-150-Carbon-Fiber-Quadcopter-Frame-Kit-Only-20g-p-982271.html?p=I32013833408201410RW

Motors CW : http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=505_506_749&products_id=5052


Motors CCW : http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=505_506_749&products_id=5051

ESC: http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=505_507_699&products_id=4919


Props: http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=534_539_567&products_id=4928

http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=534_539_567&products_id=4929


Pixracer FC and Power Module: http://auav.com/


Battery: http://www.getfpv.com/batteries/flight-packs/lumenier-800mah-3s-20c-lipo-battery-jst.html

Strap: http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=53_160&products_id=3735

FPV Camera:

http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_62_12&products_id=1275

Video Tx

http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_30_33&products_id=5190

Later upgraded to green aluminum standoffs

https://aerialpixels.com/shop/tools-hardware/metric-standoffs/m3-x-35mm-aluminum-round-step-standoff-green-4pcs

https://aerialpixels.com/shop/tools-hardware/metric-screws/m3-x-6mm-aluminum-socket-button-head-metric-screws-green-4pcs/?ref=isp_rel_prd&isp_ref_pos=4

NOTE, I was using this with DVR, lag was horrid, so dont use it, its impossible to race with.
Video Tx: http://www.overskyrc.com/mxvtxb-video-tx-micro-video-tx-6g-p-549.html

DVR and FPV Camera: http://www.overskyrc.com/micro-digital-camera-10g-real-time-dv-output-p-541.html

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Replies

    • MR60
      Forrest Frantz > Edgar Scott April 26, 2016 at 7:06pm

      I'd like to start with the frame if you are interested (keep the exact shape but build it out of composite sandwich panel). Friend me if you are interested (I can send you the parts). It would be great to get it up to 3 min flight time at a winning race speed and acceleration (about 7-8 min normal flight time). This would really help the FPV racing app.

    • Tom > Forrest Frantz May 6, 2016 at 7:03am

      We are currently also experimenting with the DT200 frame but want to switch to a printed PETG parts and use less screws, preferable a print from 2 parts with proper protection.

      prefering these T-Motors and 5 inch props

  • Quadzimodo April 19, 2016 at 5:52am
    Nice rig. That is what the PixRacer was built to do! Love those tiny props, but worry they would be a mission to balance. Best of luck with your PIDs.

    Still waiting on my order from auav, but it shipped a week ago and thus can't be too far away. I have high hopes for this exciting new FC.

    That little camera and DVR combo unit looks interesting. What is the latency on the live output like?
    • Edgar Scott > Quadzimodo April 19, 2016 at 8:07pm

      latency is bad, I also have a RMRC micro one and that one seemed so much quicker, but no DVR.

      There is a FPV video in the top of this post so you can see the recording.  Its not much but its a start.

      This video was done before I got it flying as good as today so don't expect much in the way of flying, but you can at least see the video quality.

      Here is today's test with new standoffs and PIDs, you can see how much better its gotten.

  • Kristian Klausen April 14, 2016 at 7:10am

    Looks really nice! Could you provide a link to the power module?

  • Marcus Wright April 13, 2016 at 9:08am

    I always break the FPV antennas off when connected straight to the board.  A short pig tail zip tied to the frame for strain relief works well.  But then again, I crash more than most!!!

    • Edgar Scott > Marcus Wright April 17, 2016 at 3:52pm

      Funny you say that, I lost it on my last flight, they are like 25 bucks at getfpv

  • DG April 12, 2016 at 7:38pm

    What ESC's?

    Which PM did you use?

    Not sure how involved you want to get, but here's a video on tuning:

    I had problems with my big Y6 1 1/2 years ago, but had the advantage of Leonard Hall intervening and get me close enough to do auto tune. Watching yours do AT would be a real hoot!

    Have you checked vibration levels in the logs? Also, what do the THR_OUT look like at hover? I'm wondering what the thrust is of those props vs weight

    BTW, you've inspired me to build a sub 250g fully autonomous quadcopter. Thanks a lot for your efforts!!

This reply was deleted.