Scrapy Koko 120 - 2.5" with 3" props or "break me please"

By WizzX on May 04, 2020

14  304  2

As I updated my 3" Cloud 149 cinewhoop with new motors, ESC, FC and VTX i would like to reuse leftowers from that. Those "scrapy" parts was quite poor and not so powerfull, But if I use really light frame, they can be strong enough to have fun .
I just blindely chose iFlight Turbobee 120RS really light (8.6 g ) frame what is 2.5" toothpick class with 16x16 stack, but I beleave that I would put the 3" props, 20x20 stack and larger motors somehow :)
I know, i know. This frame is too week for that bulky components, but why not?

So the issues was:

  • Put 3" props on that frame which can handle max 2.5" props (motor extenders)
  • use 13xx motors on frame with holes for 11xx motors (motor extenders)

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  • Use 20x20 stack on that frame with 16x16 (stack extender)

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3D models
Again, As I'm good friend with Sketchup and my 3D printer, theres some 3D printed parts,
You can find all related 3D models here

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My 3D printer:
I have SLA LCD 3D printer (Anycubic Photon S) and UV resin.
https://s.click.aliexpress.com/e/_dXeSan0
I’m using Flexible resin.
https://s.click.aliexpress.com/e/_dXGSLIw

Components used:
Frame - iFlight Turbobee 120RS https://s.click.aliexpress.com/e/_dWF6oNe
FC - F4 Noxe V1 Flight Controller https://s.click.aliexpress.com/e/_dV4X0pW
ESC - 15A 4 in 1 ESC https://s.click.aliexpress.com/e/_dTIHwCO
Motor - Readytosky 1306 3100KV https://s.click.aliexpress.com/e/_stOpcU
Props - 3045 3blade https://s.click.aliexpress.com/e/_dUeFohC
Cam - Caddx Turbo EOS2 16:9 Mini PAL https://s.click.aliexpress.com/e/_d801GIK
RX - Radiolink R12DSM https://s.click.aliexpress.com/e/_s7wq96
VTX - Mini 5848 VTX 48CH https://s.click.aliexpress.com/e/_dUx9cbM
LiPo - Battery Tattu 450mAh 75C 14.8V 4S https://s.click.aliexpress.com/e/OCPf6NEs

Later I will add split cam to get some HD video. I already ordered:
Runcam Split 3 nano https://s.click.aliexpress.com/e/_dVihUVQ

Build:
Get the frame ready for grinding

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And grind out a bit of carbon on the outside of arm as on the picture (if your motor axes stand out from motor)

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Prepare aluminium extenders from 16x16 to 20x20 stack (Which also move tower 4mm to back to fits the split camera)
I just cut it with engraving laser to the tape sticked to the aluminium plate, to preciser cutting

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2D model of FC extenders here

And some hand work with saw and grinder

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Put it on the frame, than (as My VTX had one side of PCB flat) put a thermal pad on that plates to get some heat from VTX

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Than add VTX and 5mm Nylon spacers.

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Solder XT30 wires sideways from the ESC.

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Split the cable to 50/50 and solder half from top a half from bottom of PCB to have stronger joints

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I removed old heat shrinks from motor wires (as they looks ugly and are too wide) and use only one bigger shrink for all 3 wires and only short thin shrink on the ends of the cables (sorry no photo here)

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Add 2 screw to the motor and solder the cables to the ESC and put a insulation tape on the arms to protect cables.

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And you can unscrew two temporary screws and screw motor via 3D printed extenders

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And a picture with extenders only from final build:

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you can find a 3D model of extenders here
theres also optional stands inside of 3D model for SLA printing
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Even I created more bulky front version which is not tested yet:
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Rest of the build is just standard connection of FC, RX and camera, so I did not take any pictures.
anyway as it is reused from my Cloud 149, just go to that build

Photos

Part List

Frame

US $22.0 |iFlight Turbobee 120RS Spare Part 120mm Wheelbase Bottom Plate w/ Canopy Frame Kit for RC drone FPV Racing Toothpick|P
Aliexpress.com
See Site

Flight Controller

US $14.79 |Upgraded 20x20mm Betaflight F4 NOXE V1 BEC Flight Controller AIO OSD BEC w/ LC Filter Barometer Blackbox for RC Dron
Aliexpress.com
See Site

ESCs

4 x US $14.35 19% OFF|15A 4 IN 1 BLHELI_S ESC Mini F3 F4 Flight Controller Board Built in Barometer OSD 20x20mm Brushless Support 4S
Aliexpress.com
See Site

Motors

4 x US $18.0 25% OFF|1306 3100KV 2 4s Brushless Motor For Diatone 150 180 210 Quadcopter Multicopter CW & CCW 4Pcs/lot|Parts & Acces
Aliexpress.com
See Site

Propellers

US $4.95 38% OFF|6Pairs 12PCS Black T3045 3045 PC 3 blade Propeller for iFlight BumbleBee MegaBee Brushress Motor RC Drone FPV R
Aliexpress.com
See Site

FPV Camera

US $16.19 19% OFF|FPV Camera Caddx Turbo EOS2 1200TVL 2.1mm 1/3 CMOS 16:9 4:3 Mini FPV Camera Micro Cam NTSC/PAL For RC Drone FP
Aliexpress.com
See Site

FPV Transmitter

US $12.22 |Mini VTX5848 48CH 5.8G 25/100/200mW Switchable FPV RC Drone VTX Video Transmitter Module OSD Control Multirotor Spare
Aliexpress.com
See Site

Receiver

US $15.64 8% OFF|Radiolink R12DSM 2.4G 12 Channels Receiver for Radiolink Transmitters AT9 AT9S AT10 AT10II|Parts & Accessories|
Aliexpress.com
See Site

Batteries

US $11.99 |4PCS ACE Tattu 450mAh 75C 14.8V 7.4V 4S 2S Lipo Battery XT30 XT60 T Plug for RC FPV Racing Drone|Parts & Accessories
Aliexpress.com
See Site

Radio

RadioMaster TX16S Hall Sensor Gimbals 2.4G 16CH Multi-protocol RF System OpenTX Mode2 Transmitter for RC Drone (95 builds)
Banggood.com
$185.99

Goggles

US $299.99 50% OFF|Eachine EV200D 1280*720 5.8G 72CH True Diversity FPV Goggles HD Port in 2D/3D Built in DVR|fpv goggles hd|fpv
Aliexpress.com
See Site

3D Printed

ScrapyKoko 120 | 3D Warehouse
3dwarehouse.sketchup.com
See Site

HD Camera

GoPro Hero5 Session (Renewed) (17 builds)
Amazon.com
$184.99

HD Camera

Insta360 GO Smallest Stabilized Mini Camera Vlog Making for IPhone and Android
Aliexpress.com
$179.99

Radio Module

Original TBS CROSSFIRE TX/ TX LITE /MICRO TX V2 915MHz Radio Transmitter Long Range RF Module for FPV Drone Racing Long Range
Aliexpress.com
$79.99

Battery Charger

Battery Charger D6 Dual Channel Intelligent Model Charger 2 in 1 For Phone RC Plane Wireless Charger
Aliexpress.com
$103.00

Backpack

Protector Plus 25L Outdoor Bag Multifunctional Waterproof Military Backpack for Hiking Camping Climbing Travel Sport Travel Bags
Aliexpress.com
$32.75
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Discussion

Sign in to comment

-X3-   May 04, 2020  
1

Insane, first crash will total it for sure ! I managed to break that exact frame with the stock motors and 2,5" props lol

lorenzo220580   May 04, 2020  
1

very very  nice

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