'Murican Crab

By Walker on Jul 10, 2017

5 273  9 

Blew up Omnibus F3 Nano v1 & fried V2's BEC powering VTX, receiver and taillight. Ordered F4 Nano v3 in hopes of third time charm, but am presently using a spare PikoBLX so it isn't a $300 paperweight in the interim.

It's very quick, but a little underpowered to carry a GoPro and retain its desirable flight characteristics. Maybe the new BH 1608 or returner 1806 would satisfy in that regard, but I'm content to just thrash this thing around for the joy of it.


Part List


Garagecrab (12 builds)

Flight Controller

OMNIBUS F4 Nano v3 with LC filter (5 builds)


4 x EMAX D-SHOT Bullet Series 20A ESC (BLHELI_S) (18 builds)


4 x Rotorgeeks 7075 Series 1407 3200kv (6 builds)


DAL T4045 V2 Tri-Blade (23 builds)

FPV Camera

FOXEER Arrow V3 2.5mm 600TVL 4:3 HAD II CCD PAL/NTSC IR Block Mini FPV Camera Built-in OSD MIC (108 builds)

FPV Transmitter

TBS UNIFY PRO 5G8 V2 SMA (112 builds)


TBS UNIFY PRO 5G8 Linear Antenna (62 builds)


Frsky XM+ Micro D16 SBUS Full Range Receiver Up to 16CH for RC FPV Racing Drone (546 builds)


Panda Power 1300 4s 95c TOP (28 builds)

Power Distribution

Piko PDB (3 builds)

Misc Parts

Matek LED Tail light WS2512B with Loud Buzzer Dual Modes for RC Drone FPV Racing (20 builds)
Show stores (10)


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lazd   Jul 11, 2017  

Nice build! I was worried the Nano V2s BEC would be weak, they always write "1.5A" but that's the maximum current at a 0.1V drop, and we're asking for a 11.8V drop... All of my Crabs have a separate BEC, using the RTFQ 1-17V adjustable voltage regulator, it gets the job done.

As far as carrying a GoPro, I have an identical build with RG 1407 3200kV, Bullet 20A, and DAL T4045 v2, but I run 1000mAh batteries, and though it carries the GoPro just fine it's definitely not as nimble as it is without it, but it's still a joy to fly.

Walker   Jul 12, 2017 

Your treetop zooming videos definitely piqued my interest in the frame.

I agree it carries a session fine as is, but for me what is given up isn't worth the buttery video. I even went down to an 850 trying to keep the cornering and hangtime, but it wasn't a compromise I was happy with. I guess I just have too many quads capable of doing the job better. First world problems.

Running a 1300 sans GoPro I'm getting 4-5 minute flights if I'm not putting the hammer down the whole time, which is pretty joyous :)

lazd   Jul 12, 2017 

I guess we'll need to do a RunCam Split-sporting crab build soon :)

1300mAh is a bit heavier than the frame was designed for, let me know how it holds up to abuse!

Whiffles   Jul 10, 2017  

Looks fantastic! Might want to crop your cover image to center the quad. It'll show up a lot better.

Walker   Jul 12, 2017 

Thank you!

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