So basically I converted a Diatone ER349 to a Donut 3 frame. I will post more videos of it flying around once I get around to it!
Here is the PID tune I am using on betaflight 3.5.1, the motors come down cold!
Flight times are about 3 minutes on a 4s 850mah. I will try a 1000-1300mah in the future.

https://drive.google.com/file/d/1S8_EbKN5XDOAzzafYdW15wQ0u-YN8Vg1/view

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Photos

Part List

Frame	Donut" 3 Inch 140mm H-type Frame Kit 3D Printed + Carbon Fiber for RC Drone FPV Racing 75.5g (5 builds) Banggood.com	$29.99
Flight Controller	MAMBA F722 MINI Betaflight Flight Controller OSD 5V/2A & 306 30A 2-6S Blheli_32 Dshot1200 FPV Racing Brushless ESC for RC Drone (13 builds) Banggood.com	$85.49
Motors	4 x MAMBA 1408 4000KV 3-4S Brushless Motor For Diatone GT R349 FPV Racing RC Drone (24 builds) Banggood.com	$59.96
Propellers	Banggood.com (10 builds) Banggood.com	See Site
FPV Camera	RunCam Swift Micro V2 2.1 FPV Kamera OSD (282 builds) N-factory.de	$31.95
FPV Transmitter	TBS Unify Pro 5G8 V3 (SMA) (197 builds) Getfpv.com	See Site
Antenna	XILO AXII SMA 5.8GHz Antenna (RHCP) (2pcs) (13 builds) Getfpv.com	$19.99
Receiver	TBS CROSSFIRE NANO RX (SE) - FPV LONG RANGE DRONE RECEIVER (412 builds) Team-blacksheep.com	$29.95
Batteries	Gaoneng GNB 14.8V 850mAh 4s 80/160C Lipo Battery for RC Drone (11 builds) Banggood.com	$20.80
Batteries	TATTU 14.8V 850mAh 75C 12.58Wh 4S XT30U-F Plug Lipo Battery for RC Racing Drone (13 builds) Banggood.com	$19.56
Radio	FrSky 2.4G 16CH Taranis X9D Plus Transmitter SPECIAL EDITION w/ M9 Gimbals (48 builds) Getfpv.com	See Site
Goggles	SKYZONE SKY02X 5.8Ghz 48CH Diversity FPV Goggles With Head Tracker Front Camera Fan 2D/3D HDMI For RC Drone (12 builds) Banggood.com	$285.55
HD Camera	GoPro HERO7 Black Action Camera (102 builds) Getfpv.com	$399.99
Radio Module	TBS Crossfire Micro TX V2 (153 builds) Team-blacksheep.com	$69.95
Battery Charger	Online-Shop Ursprüngliche SKYRC IMAX B6 MINI Balance RC Ladegerät/Entlader Für RC Hubschrauber Wieder spitze NIMH/NICD Flugze (6 builds) De.aliexpress.com	$27.16
Tools	Emax H1.5 H2.0 H2.5 H3.0mm Hexagon Socket Screwdriver Set Allen Driver for RC Drone FPV Racing (3 builds) Banggood.com	$7.33

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Diatone ER349 to Donut 3 cinewhoop conversion!

By Thomaat on Nov 09, 2019

Photos

Part List

Frame

Flight Controller

Motors

Propellers

FPV Camera

FPV Transmitter

Antenna

Receiver

Batteries

Batteries

Radio

Goggles

HD Camera

Radio Module

Battery Charger

Tools

Discussion

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