My Croak Wad

By daich on Jul 12, 2017

4  685  3

Micro build #2 ... Going for 3S!

Found a 20x20 tower for el cheapo - taking a gamble. the 4-in-1 ESC board has TWO standoffs?!! how in the world.... must dig into creative juices here

Motors are 4000kv so may need more prop than the 2435 4 blades....let's see how it flies first...alternatively the KT100 can actually fit 3 inch props if the top deck isn't used so I'm in the middle of sourcing a 3D printed AIO mount that sits on top of a 20x20mm square.

Delays Motor 1 ESC isn't working. No response when I throttle up on betaflight console. All other motors are fine. Checked soldering, swapped motors. I guess this wasn't tested property at the factory when it was sent out. The ESC is talking to the BLHeli dashboard which is even able to flash the firmware on it. I've given up trying to get it to work and just waiting on the ebay seller give me direction on what to do next

Update got refunded for the stack - ghetto but I've put in a racerstar 8a on one of the arms. I've also gone the 2.5" route with a micro swift in the original pod - she's ready to maiden!

Done! Final product sure did morph all over the place but turned out to be quite a bird in the end. The micro runcam is now in with a total weight of 50g before battery. Getting 11+ minutes of runtime out of 450mah 3S is just nuts. I have take some hovering breaths due to brain sag. Even after a ripping run and the the motor and battery comes down cool!!

Update 2017/14/08 This thing runs 4S - and still with cool motors. OMG is it a blast. 450mah 4s 75c Tattus - about 5 min of non-blinking heart thumping flight. Its my goto quad now... as it flies anywhere because it's so small yet deceivingly rips!! AUW is 118g with the 4s!


Part List


Realacc KT100 100mm Carbon Fiber Frame Kit for RC Drone (6 builds)

Flight Controller

Mini F3 Flight Control Tower PIKO BLX BLheIS 10A 2~3s 4 in 1 ESC For Indoor Brushless RC Racer Drone Quadcopter


20x20mm Racerstar Mini RS12Ax4 12A Blheli_S BB2 2-4S 4 in 1 Brushless ESC D-Shot Ready (19 builds)


2 x DYS BE1104 6500Kv Micro Brushless Motor- set of 2 (48 builds)


2 Pairs Gemfan 3025 PC Propeller CW/CCW For 1104 Motor 120 150 160 RC Drone FPV Racing Multi Rotor (30 builds)

FPV Camera

RunCam Micro Swift 600TVL 2.1mm IR Blocked 1/3 CCD FPV Camera PAL/NTSC 5.6g (192 builds)

FPV Transmitter

Eachine VTX03 Super Mini 5.8G 72CH 0/25mW/50mw/200mW Switchable FPV Transmitter (417 builds)


FrSky Ultralight XM Receiver Up To 16CH for RC Drone FPV Racing (71 builds)


Turnigy nano-tech 450mAh 2S 65C Lipo (E-flite Compatible - Blade 130X EFLB3002S35) (13 builds)


DJI FPV Remote Controller (Mode 2) (60 builds)


Jumper T12 PLUS Open Source 16ch Radio with JP4-in-1 Multi-protocol RF Module With HALL Gimbal for RC Drone Car Boat (10 builds)


DJI Digital HD FPV Goggles (145 builds)


FatShark Dominator V2 Headset System Goggles Video Glasses 600 X 480 VGA
See Site

HD Camera

GoPro Hero5 Black — Waterproof Digital Action Camera for Travel with Touch Screen 4K HD Video 12MP Photos (8 builds)

HD Camera

GoPro HERO7 Black Action Camera (102 builds)

Misc Parts

20×20 TPU micro Swift mount

Video Receiver

GTeng T909 5.8G FPV Artifact 32CH Receiver 2 inch LCD Wearable Watch for RC UAV Quadcopter Drone Aircraft -

Video Receiver

ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (178 builds)

Video Receiver

TBS Fusion (44 builds)

Radio Module

TBS Crossfire Micro TX V2 (154 builds)

Battery Charger

iSDT SC-620 Smart Charger (500W)
See Site

Soldering Iron

MINI TS100 Digital OLED Programmable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (265 builds)


Upgraded MINI ES121 Electric Screwdriver Smart Repairtools Built-in STM32 Chip OLED with Screwbits (2 builds)


Turnigy Transmitter Bag / Carrying Case


SpeedyBee Bluetooth USB Adapter
See Site

Misc Supplies

VIFLY ShortSaver 2 Smoke Stopper (2 builds)
See Site

Misc Supplies

FPV antennas for drones - Actuna TBS ImmersionRC - Actuna Sp. z o.o.

Misc Supplies

TrueRC X-AIR 5.8GHz Crosshair Antenna (RHCP) (4 builds)
See Site

Misc Supplies

Foxeer Lollipop 2 Stubby 5.8G Omni Antenna(2pcs)

Misc Supplies

ISDT BattGo BG-8S Smart Battery Checker Balancer Receiver Signal Tester Quick Charge Function (4 builds)
See Site
Show stores (13)


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Dsphar   Jul 16, 2017  

How was the first flight?

daich   Jul 17, 2017 

rubbish. 2535 are way underpropped for a 4000kv even on 3s
my plan to remedy this:
-lighten the whole craft by removing the pod
-ordered a 20x20 stack mount for the micro swift
-this will allow me to run 3" props
-8a esc that replaced motor 1 was suffering so will replace all the ESC's with a 12a 4in1

daich   Jul 22, 2017 

changed out ESC to 12a 4in1 and removed pod and temporarily have an AIO while waiting for micro swift mount
AUW 100gram including 450mah 3s battery!! She flies wonderfully now

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