GEPRC GEP-MX3 'Sparrow'

By cjdavies on Oct 15, 2017

19 2,999 8

Transplanting the components from my Realacc MM130-o (Owl-style clone) onto a smaller frame.

162g dry, 263g with 850mAh 45C 4S Nano Tech.

Photos

Part List

Frame	GEPRC GEP - MX3 Sparrow 139mm DIY Frame Kit - $35.00 \|GearBest.com (19 builds) Gearbest.com	$35.00
Flight Controller	FuriousFPV RADIANCE Flight Controller - DSHOT600 VersionSKU: FPV-RADDS (3 builds) Furiousfpv.com	$29.95
ESCs	Racerstar RS20Ax4 20A 4 in 1 Blheli_S Opto ESC 2-4S Support Dshot150 Dshot300 for RC FPV Racing Drone (67 builds) Banggood.com	$27.56
Motors	4 x EMAX RS1306 4000K Brushless Motor CW (19 builds) Getfpv.com	$51.96
Propellers	DYS-XT 3030 3 (1CW & 1CCW) Kadosmultirotors.com	$1.39
FPV Camera	RunCam Micro Swift 600TVL 2.1mm IR Blocked 1/3 CCD FPV Camera PAL/NTSC 5.6g (199 builds) Banggood.com	$29.99
FPV Transmitter	Runcam TX25 5.8G 48CH 25mw Video Transmitter for Micro Swift Micro Swift 2 Micro Sparrow (7 builds) Banggood.com	$12.99
Receiver	FrSky XSR 2.4GHz 16CH ACCST Receiver w/ S-Bus & CPPM (481 builds) Getfpv.com	$14.99
Radio	FrSky Taranis X-Lite Pro ACCESS 2.4GHz Radio Controller (Deep Sea Blue) (21 builds) Getfpv.com	$199.99
Goggles	Eachine EV800DM Varifocal 5.8G 40CH Diversity FPV Goggles with HD DVR 3 Inch 900*600 Video Headset Build in 2000mAh Battery (2 builds) Banggood.com	$79.90
HD Camera	GoPro HERO8 Black - Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 1080p Live Streaming Stabilization (19 builds) Amazon.com	$348.99
Radio Module	Frsky R9M Lite Pro 900MHz Transmitter Module Up to 1W RF Power Compatible FrSky ACCESS Protocol for Taranis X-Lite Pro S and X9 (12 builds) Banggood.com	$65.99
Soldering Iron	Hakko FX888D-23BY, 599B-02 Soldering Station with 599B Tip Cleaner, Blue/Gold (13 builds) Amazon.ca	$95.13

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Discussion

Arise Jul 18, 2018

Do you know the weight of the aluminium top part (the canopy) with its screws and standoffs? Without the carbon base frame. Thanks!

cjdavies Aug 13, 2018

No idea I'm afraid & I'm not planning to pull it apart to rebuild it quite yet!

the_AdimalFPV Nov 10, 2017

I'm trying to design my first build and I am thinking about putting these 1408 4100kv motors on the 145mm GEPRC frame. (http://geprc.com/product/geprc-gep-gr1408-4100kv/). I also want to run the runcam split 2 with a 850mAh 4S battery. I'm assuming those motors would give me more punch power, but I do not know as I have never built a quad yet. Is this possible/would it be worth it?

cjdavies Nov 10, 2017

I'm no expert on 3" builds, but I think the consensus is that 14xx is more 4" territory than 3", unless you want to run really heavy/aggressive 3" props (which might give you more punch, but wouldn't necessarily fly as smooth nor as long). These 1306/4000 certainly aren't lacking in punch (

) while still getting a good 5 minutes on an 850 4S - & apparently these Emax ones aren't even considered that good anymore as 13xx motors go!

the_AdimalFPV Nov 11, 2017

Hmmm, i'll take your word for it. Those 1306/4000 look very nice and i'll probably run them now. Thanks!

Whiffles Oct 15, 2017

I was tempted to build that frame. It's pretty unique and GEPRC makes a quality frame for the price.

cjdavies Oct 15, 2017

I was pleasantly surprised by the quality, especially considering the pricepoint. I'm still amazed that a 36mm stack with bags of spacing between the boards fits in so easily, it really was a breeze to build.

Whiffles Oct 16, 2017

Yep, it looks to have plenty of space. It would probably be a very good candidate for the Runcam Split.

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