QX90 Vintage Rebuild

By RawFPV on Jul 15, 2024

2 0 2

QX90 2016 Vintage Rebuild

This thing has been many things since it was initially bought as a BnF. It's been on 3d printed frames, a mini wing, and even a hovercraft. I felt it needed to go back to its orginal confiuration now that my son has started his FPV jorney, and give him a few more options and knowlage of what flying used to be like when I first started.

I found almost all the original parts to rebuild it as it was, but updated the receiver to ELRS and flashed the last 4.06 betaflight firmware being this is an F3 chip. The FC on this thing is very cappable with having 3 open UARTs and 6 places to solder a motor to. I did consider making this into a hex style quad, but then I ended up finding the smaller newer version of this board and will be making that later.

Considering its age and tech, it flies extremely well and is very smooth as long as you don't try any flips at low altitudes lol.

Photos

Part List

Frame	QX90 Micro FPV Racing Quadcopter Carbon Fiber Frame Kit Citytechbd.com	$1.26
Flight Controller	Tiny SP RACING F3 EVO BRUSH Flight Controller Geekbuying.com	$27.69
Motors	4pcs 8520 Coreless Brushed Motor and 65mm Propellers Set 12,000kV (2x CW / 2x CCW) Speedyfpv.com	$3.99
FPV Camera	Redpawz JF-03 AIO Mini FPV Camera Geekbuying.com	$24.99
Receiver	BetaFPV ELRS Nano Receiver - 2.4GHz (32 builds) Pyrodrone.com	$9.99
Batteries	weBLEEDfpv 300mAh 1S LiPo Batteries * CHOOSE PLUG STYLE * (6 builds) Webleedfpv.com	$26.99
Radio	RadioMaster Boxer MAX RC Transmitter w/ AG01 Hall Gimbals ELRS - Choose Color (3 builds) Pyrodrone.com	$259.99

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Discussion

scirocco Jul 17, 2024

Very good to see (nostalgy) somebody to build brushed drone...
Yeah QX90 and QX100 had been my favorite frame 8 years ago :)
https://rotorbuilds.com/build/27143

Brushed is very good to learn ACRO fly but not enough for realy freestyle bcus less power of motors.
Anyway I like and using them this time even they are many years old! I have
1S-2S 8520 65mm https://rotorbuilds.com/build/27142
2S 1020 75mm https://rotorbuilds.com/build/27253
Last update had been Xm+ into ELRS!
Good toy for big boys :)

wind_rapport Jul 16, 2024

Love it. I still fly a dang Inductrix from time to time so I can always appreciate the legacy stuff. Solid post, build, pics, and writeup 👍

Some Inductrix stuff!

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