A coaxial bi-copter

By ledimestari on Jul 30, 2019

46  2,155  13

A flying stick, or a coaxial bi-copter, is what I decided to build once I saw the video by RCTESTFLIGHT. Even though he clearly didn't put too much effort into the design the concept was cool and the idea was quite simple even if it might look complicated. I knew I could do much better job in creating one of these and make it more robust and durable while keeping it 90% 3D-printed.

Flight video:

See the full build log with more details on my blog.

Photos

Part List

Frame

Machifit 500mm*12mm*10mm Black Carbon Fiber Tube Roll Wrapped Tube for Multicopter
Banggood.com
$4.87

Flight Controller

Matek F722-SE F7 30x30 Flight Controller w/ 5V BEC , Video Power Switcher, Dual Camera Image Switcher (74 builds)
Racedayquads.com
$62.99

ESCs

2 x Spedix GS30 32Bit DShot1200 30A ESC (30 builds)
Racedayquads.com
$25.90

Motors

2 x Racerstar 2207 BR2207S Green Edition 1600KV 2200KV 2500KV 3-6S Brushless Motor For RC Drone Frame
Banggood.com
$18.34

Propellers

2 Pairs Gemfan Flash 7042 7.0x4.2 PC 2-blade Propeller 5mm Mounting hole for RC FPV Racing Drone (13 builds)
Banggood.com
$3.86

FPV Camera

Caddx Turbo Micro F2 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera W/ Microphone (41 builds)
Banggood.com
$20.99

FPV Transmitter

DYS MI200MW 25/200mW Switchable 5.8G 40CH FPV Transmitter (10 builds)
Banggood.com
$13.99

Antenna

Pagoda-2 5.8ghz RHCP Antenna (14 builds)
Armattanquads.com
$6.00

Receiver

FT4X 2.4G Mini SBUS Receiver Compatible With FASST for RC Drones (2 builds)
Banggood.com
$15.99

Batteries

Turnigy nano-tech 1300mAh 4S 45~90C Lipo Pack
Hobbyking.com
$19.60

HD Camera

GoPro HERO7 Black Action Camera (106 builds)
Getfpv.com
$399.99

Misc Parts

10PCS M2/M3 Clevis Wire Trolley Iron Chuck Metal Rod Clamp For RC Airplane
Banggood.com
$2.82

Misc Parts

5 pcs M2 M3 M4 RC Ball Link With Rod Ball Joint Set RC Airplane Spare Part
Banggood.com
$2.47

Misc Parts

6X MG90S Metal Gear RC Micro Servo (3 builds)
Banggood.com
$12.59

Misc Parts

Grade 12.9 Carbon Steel Black Threaded Metal Rod M2/M2.5/M3/M4 Length 250MM
Banggood.com
$1.91

Misc Parts

2 x Panasonic 1000uF 35V for ESC Noise Reduction (119 builds)
Racedayquads.com
$2.98
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Discussion

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fw42   Apr 18, 2021  

Amazing

facewizard13   Aug 11, 2019  
1

yup, this is the weirdest thing I've seen today

ledimestari   Sep 02, 2019 

Haha, Thanks, I guess

thegreen4me   Jul 31, 2019  
1

RIP rctestflight-bro; what could have been if you were with us for longer

Show 2 more comments
thegreen4me   Aug 03, 2019 

are u guys sure??? In my timeline he died in a motorcycle accident!!!

SkyLine FPV   Aug 04, 2019 
1

That's Sam Sheperd.

ledimestari   Aug 05, 2019 

I understand the cunfusion, their videos we're kind of similar with same style of building foamboard airplanes with voiceover. Samm Sheperd was indeed the one in a motorcycle accident, but his tribute video came out six months before rctestflights flying stick video.

Minichado   Jul 30, 2019  
2

Basically you are now piloting darth mauls lightsaber.. epic! got any flight video?

ledimestari   Jul 31, 2019 
1

There is now! I don't know why the embedding code didn't work...

Whiffles   Jul 31, 2019 
1

You don't need to use the embed code. Just paste the youtube link and it'll embed.

thumbtwiddler   Jul 30, 2019  
4

the new vannystyle frame looking kinda funky ngl lol

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