Grvdigr Tombstone 4sX (sub 250g)

By moxfpv on Mar 15, 2018

12 476 3

I built this quad to prove I could build a 4 inch quad with a good size battery (4s 850mah) under 250grams. I originally bought an Avant Leggero loved the combination of the HQ 4X4.3X3V1S with 3600kv motors. I listed all the parts in a spreadsheet and looked for places to save weight. I heard good reviews of the RG motors, and they were only 14g each. I found working with the HGLRC XJB F428 stack a lot easier than most builds, the two boards have pins for power and signal. I went with the Grvdigr frame as it was 42g, I could have gone with another Avant frame, but the price was right, and it's Canadian. The Caddx F1 cam was a surprise how good it was, I originally put a Runcam MicroSwift but wanted to black out the frame.

Photos

Part List

Frame	Tombstone 4sX (3 builds) Grvdigr.com	$30.00
Flight Controller	HGLRC XJB F428 F4 Brushless Flight Control System - $59.80 \|GearBest.com Gearbest.com	$59.80
Motors	4 x Rotorgeeks 7075 Series 1407 3600kv (9 builds) Rotorgeeks.com	$84.44
Propellers	HQ Durable Prop 4X4.3X3V1S (2CW+2CCW) (3 builds) Rotorvillage.ca	$4.59
FPV Camera	Caddx Turbo Micro F1 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera 4.5g (77 builds) Banggood.com	$19.99
FPV Transmitter	Eachine VTX02 Super Mini 5.8G 40CH 200mW FPV Transmitter for RC Drone FPV Racing (26 builds) Banggood.com	$8.38
Receiver	Frsky XM+ Micro D16 SBUS Full Range Mini Receiver Up to 16CH for RC FPV Racing Drone Banggood.com	$13.69
Batteries	Tattu 850mAh 4S 45C Lipo XT60 Rotorvillage.ca	$18.99
Radio	Banggood.com (15 builds) Banggood.com	See Site
Soldering Iron	MINI TS100 Digital OLED Programable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (264 builds) Banggood.com	$49.99

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Discussion

moxfpv May 15, 2018

Some onboard video from last night's Micro Monday meetup with the 4sX

Burning North Mar 15, 2018

I love it! I was able to get the same frame under 250g, but only because I used a 650mAh 3S pack. Super impressed! Love the Tombstone frames. :)

https://rotorbuilds.com/build/6560

moxfpv Mar 17, 2018

That's awesome, great photos, I really like the gold, I think you will really like it on 4s if you haven't tried it already.

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