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.
I’m using Flexible resin.

Components used:
Frame - iFlight Turbobee 120RS
FC - F4 Noxe V1 Flight Controller
ESC - 15A 4 in 1 ESC
Motor - Readytosky 1306 3100KV
Props - 3045 3blade
Cam - Caddx Turbo EOS2 16:9 Mini PAL
RX - Radiolink R12DSM
VTX - Mini 5848 VTX 48CH
LiPo - Battery Tattu 450mAh 75C 14.8V 4S

Later I will add split cam to get some HD video. I already ordered:
Runcam Split 3 nano

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


Part List


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


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
See Site


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
See Site


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


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


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
See Site


RadioMaster TX16S Hall Sensor Gimbals 2.4G 16CH Multi-protocol RF System OpenTX Mode2 Transmitter for RC Drone (96 builds)


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
See Site

3D Printed

ScrapyKoko 120 | 3D Warehouse
See Site

HD Camera

GoPro Hero5 Session (Renewed) (17 builds)

HD Camera

Insta360 GO Smallest Stabilized Mini Camera Vlog Making for IPhone and Android

Radio Module

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

Battery Charger

Battery Charger D6 Dual Channel Intelligent Model Charger 2 in 1 For Phone RC Plane Wireless Charger


Protector Plus 25L Outdoor Bag Multifunctional Waterproof Military Backpack for Hiking Camping Climbing Travel Sport Travel Bags
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-X3-   May 04, 2020  

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  

very very  nice

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