249g

By sp_fpv on Sep 02, 2022

2  88  0

Description:

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).
This build is a bit tricky because if you use too much tape or different pieces it will be over 250 grams :)
This build use only the top and bottom plate of the betaflight xknight35 frame kit, custom M2x20mm (4mm wide) aluminium standoff, titanium screws and custom 3d printed lightweight parts.
The front 3d printed part is for mounting a nano camera.
The middle 3d printed part is for fitting a elrs nano receiver.
The rear 3d printed part is for mounting the xt30 connector and securing the vtx antenna with a zip-tie.
I'm using the included 90° mmcx dipole antenna included in the vtx kit (which is useless in this build), I will upgrade with a longer one and with a straight mmcx connector to stick out better on top of the battery (better range and coverage).

Stats (4s 750mah pack):

AUW: 249g
Flight time: 4 to 5 mins

Motors suggestion:

Brotherhobby Tornado T2 1407 3600kv

Prop suggestion:

Gemfan Hurricane 3520

Battery suggestion:

Tattu r-line 4s 750mah

Tune (for now):

Clean build required.
PIDF
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

FILTERS
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

ESC
bluejay timing: medium

Photos

Part List

Frame

X-Knight 35 Frame Kit
Betafpv.com
$25.99

Flight Controller

Diatone Mamba AIO F411 3-6S Flight Controller w/ 35A 8Bit ESC - 20x20mm (5 builds)
Pyrodrone.com
$61.99

Motors

4 x BrotherHobby Tornado T2 1407- 3600kv (2 builds)
Drone-fpv-racer.com
$84.88

Propellers

Gemfan Hurricane 3520 Durable Tri-Blade 3.5" Propeller (2CW+2CCW) - Choose Your Color (18 builds)
Pyrodrone.com
$2.99

FPV Camera

Foxeer Nano Toothless 2 StarLight Mini FPV camera 0.0001lux HDR 1/2 CMOS Sensor 1200TVL Support OSD F405 F722 FC Control (9 builds)
Banggood.com
$34.97

FPV Transmitter

RUSHFPV RUSH TANK MINI VTX 5.8G Smart Audio 20X20 (90 builds)
Pyrodrone.com
$37.99

FPV Transmitter

RushFPV Module Micro AGC (2 builds)
Drone-fpv-racer.com
$3.78

Receiver

BetaFPV ELRS Lite 2.4GHz Receiver - Choose Version (4 builds)
Racedayquads.com
$11.99

Batteries

Tattu R-Line 750mAh 14.8V 95C 4S1P Lipo Battery Pack with XT30 Plug (5 builds)
Genstattu.com
$18.59

Radio

Radio FrSky Taranis X9 Lite S (2 builds)
Aerial-shop.com
$154.94

Goggles

Fat Shark Scout FPV Goggles (10 builds)
Pyrodrone.com
$199.00

3D Printed

Xknight35 caddx peanut by sp_fpv
Thingiverse.com
See Site

3D Printed

Xknight35 front by sp_fpv
Thingiverse.com
See Site

3D Printed

Xknight35 rear by sp_fpv
Thingiverse.com
See Site

3D Printed

Xknight35 mid by sp_fpv
Thingiverse.com
See Site

HD Camera

Caddx Peanut Action Camera (2 builds)
Caddxfpv.com
$259.99

Hardware

3 x Vis Titane M2x6mm - 10pces (2 builds)
Drone-fpv-racer.com
$8.43

Hardware

Aluminium Standoff M2 (4 mm - 30 mm ) black
Smartshapes.de
$0.44

Radio Module

HappyModel ES24TX Slim Pro ELRS 2.4GHz RC Transmitter Module (6 builds)
Racedayquads.com
$47.99

Battery Charger

SkyRC S65 Balance Charger / Discharger 65W 6A 2-4S 230V AC (2 builds)
Skyrc.eu
$33.36

Soldering Iron

Soldering Iron Station with Temperature Control
Tilswall.com
$35.99
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