4fast4furious (updated description)

By KM|fpv on Jan 27, 2021

3  183  3

As the new so called drone laws are restricting nearly anything in the hobby above the 250g mark, I've decided to give up on the 5" miniKwads and build myself a new 4" one.

But I will still be owning my "LoneRangrXL8"!

The second one is based on the skystars grx4 frame, and will be powered by an GHF411 AIO and iflight xing motors.

Update I:
I've seen and heard about the "frsky workbench problems", that when the rx is too close to the tx, there is no signal (RXLOSS/BADRX in betaflight). I gave the frsky xm+ rx a try, and after this copter cutting my left arm because of RXLOSS (standing behind it), I got outside to have some fun with it anyways. Regardless to say, that there was no fun for me. After launching, I gave a full punch to it and immediately RXLOSS popped up, I gained control back - but stopped flying and removed this frsky xm+ rx for the trusty (no rssi) fs-rx2a.
I hope I'll get my hands on an ExpressLRS mini rx, otherwise I have to find another good rx with at least rssi.

Update II:
Sometimes, you reach out for help and than there's someone who can and is willing to help (for money of cause)! Now I have the tiny frsky r9mx receiver, flashed with ExpressLRS - happy flying!

Update III:
changed the motors to the emax rs 1606 3300kV, they fit better the prop size and LiPos I wanted to fly.

Update IV:
after disassembling my TP3, i took the caddx baby turtle from it and swapped the caddx ant for this.
now i can have HD video on this awesome build.

Update V:
Remixed a good canopy from thingiverse to fit the caddx baby turtle and the vtx, also ordered the longest M2 (30mm) screws for mounting secure. And I've ordered new propellers from HQprop, the old 4x4.3x3 where way to heavy pitched. Also testing the avan scimitar, they where intended to be used on my QAV180 The"in-between" .

Update VI a:
It's killing my batteries, I really need some help on this. I think it's too light for the powerful motors. I've changed props a couple of times, but I'm missing the opportunity to go full throttle a few seconds with "LOW BATTERY" at the late end, but I get this warning about 60% (I think) and it's almost immediately.

Update VI b:
Changed the motors to my beloved GepRC speedx 1408 3500kW, the emax RS1606 3300kV are now on my QAV180 with the emax avan scimitar.

Photos

Part List

Frame

Skystars GRX4 4 zoll Carbon Faser Rahmen Kit 155mm 4mm Arm fahrwerk für RC Modelle Multicopter Racing DIY Teile
De.aliexpress.com
$21.15

Flight Controller

JHEMCU GHF411AIO (2 builds)
Fpvframe.ch
$55.00

Motors

4 x GEPRC SPEEDX GR1408 1408 3500KV 3750KV 2-4S Brushless Motor CW Screw Thread for RC Drone FPV Racing
Banggood.com
$63.96

Motors

4 x Premium-Modellbau
Premium-modellbau.de
See Site

Propellers

HQProp T4X2.5Grey (2CW+2CCW)-Poly Carbonate (3 builds)
Hqprop.com
$2.99

Propellers

HQProp Durable 4x2.5x3V2S Grey
N-factory.de
See Site

FPV Camera

Caddx Baby Turtle Whoop Version Nano FPV Camera / 26x26 1080P 60 FPS HD DVR - Black (16 builds)
Racedayquads.com
$64.99

FPV Transmitter

Eachine Nano V3 VTX 5,8 GHz 40CH Umschaltbar FPV Sender Gebaut in Mikrofon Unterstützung OSD/Pitmode/IRC tramp RC Racing Drone
De.aliexpress.com
$21.59

Receiver

ImmersionRC Ghost Átto 2.4Ghz Receiver (6 builds)
Pyrodrone.com
$29.95

Batteries

GNB GAONENG – batterie Lipo 500mAh, 4S 14.8V 90C 180C XT30 FPV RC Drone (3 builds)
Fr.aliexpress.com
$21.12

Batteries

2PCS Gaoneng GNB 520mAh 3S 11.4V 80C/160C HV Lipo battery with XT30 Plug for Betafpv Beta85X Whoop indoor FPV Drone RC parts
Aliexpress.com
$20.00

Radio

Jumper T-Lite 16CH Hall Sensor Gimbals CC2500/JP4IN1 Multi-protocol RF System OpenTX Mode2 Transmitter Support Jumper 915 R900/C (21 builds)
Banggood.com
$69.99

Radio

Flysky FS-NV14 2.4G 14CH Nirvana Transmitter with iA8X Receiver 3.5 Inch Display Open Source (19 builds)
Banggood.com
$179.00

Radio

[US$83.99~93.99] JumperRC T-Lite V2 2.4GHz 16CH Hall Sensor Gimbals 150mW Built-in ELRS/ JP4IN1 Multi-protocol OpenTX Remote Con
See Site

Goggles

ORQA FPV.One OLED FPV Goggles + Free Bonus (FPV.PRO Antenna Set, FPV.Connect, FPV.Battery) (4 builds)
Getfpv.com
$649.99

Goggles

FatShark Dominator V1 Headset System Goggles Video Glasses 640 X 480 VGA
Goodluckbuy.com
$270.49

3D Printed

Gatehunter X Canopy by Dave_C_FPV (4 builds)
Thingiverse.com
See Site

HD Camera

Hawkeye FIREFLY Q6 Airsoft 1080P HD Multifunktions-Sportkamera für FPV
Banggood.com
$60.59

HD Camera

Insta 360 Go AI Auto Editing Hands-free Smallest Splashprooof FlowState Stabilized Sport Camera (8 builds)
Banggood.com
$203.90

HD Camera

[CA$109.65 5% OFF] Mobius Full HD Sport Kamera 1080P 30FPS 720P 60FPS Für Multirotor rc teile from Spielzeug Hobbys und Roboter
See Site

Video Receiver

Eachine PRO58 RX Diversity 40CH 5.8G OLED SCAN VRX FPV Receiver for FatShark Goggles (37 builds)
Banggood.com
$34.97

Video Receiver

ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (180 builds)
Getfpv.com
$159.99

Radio Module

JUMPER AION ELRS – avion à haute fréquence 2.4G TX NANO, avec aile fixe, avec télécommande
Fr.aliexpress.com
$35.47

Radio Module

FrSky R9M Lite 900-MHz-Sendermodul Bis zu 1 W HF-Leistung mit R9 MX OTA ACCESS Langstreckenempfänger-Kombination mit montierter
See Site

Battery Charger

URUAV U3 18W 2A/3A Type-C Battery Balance Charger for 2-3S LiPO/LiHV/LiFe/Lilon Battery
Banggood.com
$9.63

Battery Charger

Online-Shop Ultra Power UP-S6 6x4,35 watt DC 1 s Balance Ladegerät Entlader Lade Hub 6-in-1 ladegerät für RC Micro MX MCPX Li
De.aliexpress.com
See Site

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
See Site

Battery Charger

US $66.99 |HTRC T240 DUO AC 150W DC 240W 10A Touchscreen Dual Kanal Batterie Balance Ladegerät Entlader Für RC spielzeug Freie
De.aliexpress.com
See Site

Soldering Iron

MINI TS100 Digital OLED Programable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (258 builds)
Banggood.com
$49.99

Tools

Pro'sKit 900-015 Helping Hands Soldering Aid (2 builds)
Amazon.com
$10.00

Tools

Wowstick 1F+ 64 In 1 Electric Screwdriver Cordless Lithium-ion Charge LED Power Screwdriver From XIAOMI ECO-System (21 builds)
Banggood.com
See Site

Accessories

Orqa FPV.Connect (2 builds)
Shop.orqafpv.com
$68.99

Accessories

Happymodel Moxon 2.4GHz antenna for ExpressLRS TX module SMA plug for ES24TX Series For DIY FPV Racing Drone
Xt-xinte.com
$3.63

Accessories

FatShark Face Plate Frontplatte V2 mit Lüfter für die Fatshark Dominator kaufen | FPV24.com
Fpv24.com
See Site

Accessories

TATTU 2500mAh 2S1P 7.4V LiPo Battery DC3.5mm With LED Indicator Button For Fatsahrk Aomway Skyzone Eachine Goggles (7 builds)
Banggood.com
$24.95

Accessories

AG01 MINI CNC Hall Gimbals for TX12 & Zorro
Radiomasterrc.com
See Site

Accessories

ESP8285 ESP-M3 integr. 8Mbit Flash WiFi WLAN Serial Modul +25 dbm Low Power 20µA
Amazon.de
See Site

Accessories

Androegg ESP8285 ESP-M1 integr. 8Mbit Flash WiFi WLAN Serial Modul +25 dbm Low Power 20µA
Amazon.de
See Site

Misc Supplies

AchilleΣ Plus for Eachine PRO58 / RealAcc RX5808 Pro Plus OSD
Achillesfpv.eu
See Site
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Discussion

Sign in to comment

AlvaSpeed   Jul 04, 2021  

How did you fit 25.5 Fc on the 26.5 bolt pattern. Did you dremell it? I have a 26.5 frame and I cant place the Jhemcu aio without forcing the bolts....

KM|fpv   Jul 05, 2021 

it perfectly fit the frame.

OptimaZe   Jan 27, 2021  
1

I've downsized my collection as well. I only have 2 kwads left that are over 250g. Everything else is well below that mark. Fortunately with the latest generation of frames, motors, and AIO FC's we can still have some very fast, and very good performing machines that don't require registration.

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