Twig XL - Sub 250g freestyle build

By sp_fpv on Aug 02, 2022

4  46  0


This is probably the fourth revision of this build.
Sub250g freestyle drone designed for acro fliying while carrying the caddx peanut hd camera and don't compromise flight performance:
all the details below (auw, flight time, etc...) include the hd cam as a part of the drone.
Super snappy response and good throttle resolution (~7:1 thrust to weight ratio).
I'm using betaflight 4.3.1 and bluejay 0.16 (@24khz)
...and some titanium screws for weight savings.
This build was a bit tricky because this frame is intended for a 26x26mm aio (which i have used in the past) and i had to adapt it for a 20x20mm stack.

Stats (4s 750mah pack):

AUW: 249g :D
Flight time (hard freestyle): 4:30 to 5:00

Motors suggestion:

Motors i've tried so far with 4S LiPo:
iFight Xing 1404 3800kv -> too small stator, slugghish response
Diatone Mamba 1505 3800kv -> good alternative to my favourite below
Xnova 1804 3500kv t-mount -> good-ish but not durable (they failed pretty soon - shaft started slipping from the bell)
Xnova 1804 3500kv 5mm shaft (RM1804) -> it weighs a ton and eats batteries for no reason (considering the fact they have less stator volume than 1407 below)
Emax Eco 1407 3300kv -> a bit heavy and underpowered, but not bad
Brotherhobby Tornado T2 1407 3600kv -> perfect: light, thick magnets, very tight air gap and very powerfull
Brotherhobby vy1507 3100kv -> too heavy and underpowered
PS: 5mm shaft it's way more durable and less stressfull than t-mount

Prop suggestion:

Well... Gemfan Hurricane 3520 it's the only 3.5" prop available in 5mm hub.
I wish HQProp comes with 2.5x2x3 and 2.5x2.5x3 in M5 hub.

Battery suggestion:

Tattu r-line 4S 750mah

Tune (default if not specified):

Clean build required.
Master multiplier slider: 1.6
I Term slider: 0.65
Stick response: 0
Dynamic damping: 0
Vbat sag compensation: 100%
Dynamic idle: 29
Throttle boost: 0
Anti-Gravity: Off

My FC don't have a BB so here i'm staying on the safe-side,
I will update the configuration as soon as I have one with the blackbox.
Gyro lowpass 1: Off
Gyro lowpass 2: 500Hz PT1 (static)
Gyro RPM filter Harmonics Number: 2
Dynamic Notch Q: 300
Dynamic Notch Count: 2
Yaw Lowpass Filter: Off


Part List


TWIG XL 3 (4 builds)

Flight Controller

Diatone Mamba AIO F411 3-6S Flight Controller w/ 35A 8Bit ESC - 20x20mm (4 builds)


4 x BrotherHobby Tornado T2 1407- 3600kv


Gemfan Hurricane 3520 Durable Tri-Blade 3.5" Propeller (2CW+2CCW) - Choose Your Color (16 builds)

FPV Camera

Foxeer Nano Toothless 2 StarLight Mini FPV camera 0.0001lux HDR 1/2 CMOS Sensor 1200TVL Support OSD F405 F722 FC Control (8 builds)

FPV Transmitter

RUSHFPV Tank Mini 20x20 25-800mW 5.8GHz VTX - MMCX (87 builds)

FPV Transmitter

RushFPV Module Micro AGC


ELRS Lite Receiver (6 builds)


Tattu R-Line 750mAh 14.8V 95C 4S1P Lipo Battery Pack with XT30 Plug (4 builds)


Radio FrSky Taranis X9 Lite S (2 builds)


Fat Shark Scout FPV Goggles (10 builds)

3D Printed

Caddx peanut big pod by sp_fpv
See Site

HD Camera

Caddx Peanut Action Camera (2 builds)


Standoff M3 Aluminium HEX 5MM X 20MM Black (4 Pack)


M3x8mm Titanium Screw - 10pces


Lethal Conception - Support stackable pour Caddx Vista sur FC AIO 26x26


2 x Vis Titane M2x6mm - 10pces

Misc Parts

Panasonic 470uF 35V Capacitor for ESC Noise Reduction (26 builds)

Radio Module

HappyModel ES24TX Slim Pro ELRS 2.4GHz RC Transmitter Module (6 builds)

Battery Charger

SkyRC S65 Balance Charger / Discharger 65W 6A 2-4S 230V AC (2 builds)

Soldering Iron

Soldering Iron Station with Temperature Control
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