GRI BabyTooth v3

By GRIzmak on May 26, 2021

3  272  4

This is third attempt to build quad inspired by FPV cycle Baby tooth 1S. This time weight went (again) a bit higher. Manly due to heavier motors.

Unfortunately, I was not able to source the FPV cycle parts. I had to find something to replace them.

I'm using DarwinnFPV AIO Flight controller. It's adwertised as 15A 1S FC.
Engines are soldered directly to the FC. This was mainly due to FlyWoo motors didn't have plugs. Also DarwinFPV AIO is shipped without connectios soldered in.

To be able to access the USB connector without removing the FC from the frame I have flipped FC upside down. After this, you will have to remap motor order and adjust FC orientation in Betaflight. Unfortunatelly you still have to remove the canopy to connect the USB cable.
I'm using RCINPOWER GTS V2 1202.5 11500KV. They look like a single bell design. It looks like they are even more similar (than FlyWoo RB1202.5 11500KV) to FPV Cycle 1202.5 motors. I'm using a 1,5mm version. mainly because there are more propellers on the market.

Motor wires are routed on the "back" of the arms, looking from the propeller spinning direction. This way they are protected from cutting in flight. In turtle mode you still can demage motor wires.

To have this build as compact as possible I have Happy Model EP2 ELRS receiver.

I'm using XT30 for better conductivity. You need to change the plug on the battery form PH2.0 to XT30. I didn't found any 1S 450mAh or 650mAh battery with XT30.

For the canopy I'm using FEICHAO Camera Canopy for Mobula 6 HD canopy. I have designed adapter for Caddx Ant Lite camera. I find this canopy to be the most durable for me.

For the camera I'm using the caddx Ant Lite. You can use two versions of the adapter: - This one is designed to be printed out of TPU and streached to put on the camera. - This one should be printed out ot some regit material. Unfortunately it can be fragile during the crash.

I'm using the TBS Unify 32PRO nano VTX. The cammera is powered from the VTX passthough pins. Video signal and Smart Audio are connected directly to the FC. The TBS Unify needs so mush current that I'm not able to fly on max power. I got some strange artefacts in the video feed. This is not much of a problem. I'm mostly using the 100mW setting.

Whole drone weight is 53g without the battery.


Part List


FONSTER Apro 125mm 3 Inch X Type Toothpick Frame Kit 16x16mm / 25.5x25.5mm Mounting Hole compatible Runcam Nano 3 14.6g (3 builds)

Flight Controller

DarwinFPV 15A 1-3s F411 Ultralight/Whoop AIO (11 builds)


4 x RCINPOWER GTS V2 1202.5 11500KV 2S 6000KV 4S Brushless Motor for FPV Racing 1.6inch 3inch Toothpick Cinewhoop Ducted Drones


4 Pairs Gemfan Hurricane 3018 3x1.8 3 Inch 2-Blade Propeller 2mm Hole T Mount for RC Drone FPV Racing (3 builds)

FPV Camera

Caddxfpv Ant Lite 1/3'' CMOS 1.8mm 1200TVL 4:3 PAL/NTSC Global WDR FOV 165° FPV Camera FPVCycle Edition for FPV Racing RC Drone (73 builds)

FPV Transmitter

Update 500mw+ Original TBS Unify Pro32 Nano 5G8 V1.1 5.8Ghz Micro Video Transmitter VTX 5.8Ghz for RC FPV Drone plane DIY Toys (2 builds)


5PCS Eachine 5.8G 3dBi Brass Antenna Omni Directional IPEX Port for VTX01/VTX02/VTX03/ATX03 (4 builds)


10X10mm HappyModel ExpressLRS ELRS 2.4G RX SX1280 Nano Long Range Receiver PP EP1 EP2 RX for RC Airplane FPV Long Range LR4 LR7 (18 builds)


5PCS Gaoneng 650mAh 3.8V 60C/120C HV Lipo battery PH2.0 Plug for Tinyhawk Happymodel Snapper7 E010 M80S Tiny7 Beta85 RC Drone (2 builds)


RadioMaster TX16S Hall Sensor Gimbals 2.4G 16CH Multi-protocol RF System OpenTX Mode2 Transmitter for RC Drone (96 builds)


Skyzone SKY03O Oled /SKY03S 5.8GHz 48CH Diversity FPV Goggles Support OSD DVR HDMI With Head Tracker Fan LED For RC Racing Drone (47 builds)

3D Printed

Happy Model Crux Caddx Ant Lite adapter by GRIzmak (4 builds)
See Site

3D Printed

Caddx Ant Lite adapter TPU by GRIzmak
See Site

Misc Parts

FEICHAO Camera Canopy for Mobula 6 HD Brushless Racing Quadcopte Drone Mini FPV Indoor Racer Parts (2 builds)

Radio Module

HappyModel 2.4G ExpressLRS ELRS Starter Set ES24TX 2.4G Micro TX with 3PCS 2.4G EP1 EP2 RX for RC Airplane FPV Long Range Drones

Radio Module

NAMIMNO ELRS 2.4GHz Flash Micro TX Module (2 builds)

Radio Module

JUMPER JP4IN1 Multiprotocol TX moduł CC2500 NRF24L01 JP4 in 1 wieloprototypowy moduł RF Tuner TM32 wersja OpenTX dla Frsky/Fly

Battery Charger

ToolkitRC M6D 500W 15A High Power DC Dual Smart Charger Discharger for 1-6S Lipo LiHV Lion NiMh Pb Battery (19 builds)

Battery Charger

ISDT Q6 Nano Q8 Lite 500W For Pocket Battery Balance Charger For RC Parts English language version

Soldering Iron

MINI TS100 Digital OLED Programmable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (264 builds)


Fpv Drone Backpack Iflight Backpack Drone Bag Double Shoulder Packet Auction FPV QAV250 IX5 V2 Packet Large Capacity (3 builds)
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MTopp   May 31, 2021  

Have you ever tried the JHEMCU 1s board?

GRIzmak   Jun 05, 2021 

Hi, no I haven't try it. Do you have any experience with it?

MTopp   Jun 05, 2021 

not great, but that's why its $27 I suppose. I have one that might still fly, but weak ESC, I have an extra board that tests that all is well I think, but it might also have a weak ESC. I used it in a babytooth, its odd how only one ESC was weak and it still hasn't fried completely. I wonder if maybe my ESC firmware, JESC, is what is causing this now that I think of it.

GRIzmak   Jun 07, 2021 

I was specially looking for FC with integrated ESC rated for current higher than 5A. This is the only one I have found for 1S. I don't like to go to pick up the drone so I'm quite often using the Turtle mode. Having higher available current I'm less likely to fry the ESC. During the flip. The other one rated for higher current is the CycleFPV FC. Unfortunately this is not available on their site and shipping to the Europe would bring the cost of the FC to unacceptable range.

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