The story of the amazing spare-parts quad

By LeonidasGFX on Feb 12, 2020

7  208  1

This is my main basher-quad. Made out of random parts - some are quite good, others are total crap - but after a lot of tuning it flies surprisingly well.
The only parts that still survived since day 1 are the FPV camera, the reciever and the motors. And the GoPro of course, which has a broken screen so I am blind when it comes to changing settings (I had WiFi off when I cracked the screen).
The motors are pretty banged up by now but with RPM filtering they still work fine. I started running them on 6S with a 71% motor_output_limit in betaflight. Works fine, and the ESC from that cheap Mamba stack seems to be pretty reliable aswell.

Here is it's story:

It started it's life as a TBS Source. The AKK VTX I used worked pretty well, until it died in crash. I replaced it with the RushTank Racing, which I sticked on the top plate (make sure to remove the stickers on the heat sink, the carbon is actually pretty good at removing the heat). Since I hated those stupidly stiff pigtails, I went straight to a MMCX-Lollipop antenna. A good amount of electrical tape made it stiffer so it doesnt move around and gets caught in the props.

At some point the gyro on the Mamba F405 stack had enough of the crashes and started having really weird noise spikes. I replaced it with a Kakute F7 (unfortunately the ICM gyro version) from a Kakute stack that was intended to go into my Hyperlite Glide build - but ended up not fitting in there because of the foam-mounted gyro (Kabab, I am sorry for trying to fit all 30x30 hardware into your build that is designed to have everything seperated).

Eventually I had enough of the way too heavy and chunky TBS SourceOne (I mainly fly over fields anyways) and swapped it for a cheap AstroX 5 clone that was collecting dust in a corner. It's about 104g (so I shaved about 40g just by swapping frames) and the carbon wasn't too bad - it was cut in the correct orientation and after a bit of wet sanding the edges it ended up being pretty nice and very stiff. I noticed the weight improvement immediately, it felt a bit better in sharper turns and propwash handling improved visibly, apart from that the throttle control improved quite a bit. It is now at adecent 610g AUW with a 1000mAh 6S pack.

A few days ago I managed to knock off a capacitor on the ESC, so I replaced it with the same ESC from my first quad which coincidentally fell out of a tree 2 days before that (it was stuck up there for almost 7 months). On the damaged ESC I ran JESC, now I am running JazzMaverick's firmware. I don't feel a difference at all.
Oh and I am using HQ 5.1x3.1x3 props after I ran out of 4.3 HQ props. They lack a bit of top end but I compensated for that by increasing the motor output limit to 76% (which is basically increasing the KV of the motor).

I will probably change those stupidly tall standoffs for some shorter ones and get a proper GoPro mount. And if I can get my hands on the same Emax Eco motors but in 1900KV I might swap them aswell. The noise of the current bearings could impress a rattlesnake.

And shoutout to krunked for helping me with the pid/filter tune! It flies pretty damn good now.

Photos

Part List

Frame

Tonier 220mm X Style 5 Inch Carbon Fiber Frame Kit 5mm Arm Thickness for RC Drone FPV Racing
Banggood.com
$21.05

Flight Controller

Holybro Kakute F7 V1.5 STM32F745 Flight Controller W/ OSD Barometer for RC Drone (9 builds)
Banggood.com
$45.00

ESCs

MAMBA F405 MK2 Betaflight Flight Controller F40 40A 3-6S DSHOT600 FPV Racing Brushless ESC (97 builds)
Banggood.com
$42.99

Motors

4 x Emax ECO Series 2207 1700KV 1900KV 3-6S/ 2400KV 3-4S Brushless Motor for RC Drone FPV Racing (16 builds)
Banggood.com
$47.96

Propellers

HQProp DP5.1X3.1X3 3-blade 5.1Inch Poly Carbonate POPO Propeller 2CW+2CCW (4 builds)
Banggood.com
$3.63

FPV Camera

Foxeer Standard/Mini Predator 4 Super WDR 4ms latency 1000TVL FPV Racing Camera OSD 4:3 16:9 NTSC PAL for RC Drone
Banggood.com
$38.99

FPV Transmitter

RUSH Tank Racing VTX 5.8G Smart Audio Video Transmitter 20/50/200/500mW for RC Drone Multi Rotor (16 builds)
Banggood.com
$21.99

Antenna

2pcs Foxeer 5.8G Lollipop 3 2.5DBi Omni FPV Antenna RHCP StraightMMCX / AngleMMCX for RC Drone (3 builds)
Banggood.com
$21.84

Receiver

Frsky XM+ Micro D16 SBUS Full Range Mini Receiver Up to 16CH for RC FPV Racing Drone (1431 builds)
Banggood.com
$13.69

Batteries

CNHL MiniStar 22.2V 1000mAh 6S 100C Lipo Battery XT60 Plug for RC Drone FPV Racing (10 builds)
Banggood.com
$26.85

Radio

FrSky ACCST Taranis Q X7 Transmitter 2.4G 16CH Mode 2 White Black International Version for RC Drone (220 builds)
Banggood.com
$109.99

Goggles

Fat Shark Dominator V3 FPV Goggles (57 builds)
Getfpv.com
$299.99

HD Camera

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

Misc Parts

3D Pinted Gopro Session 4/5 Camera Mount for Skystars Star-load 228mm Frame Kit RC Drone FPV Racing (2 builds)
Banggood.com
$7.21

Video Receiver

FuriousFPV True-D V3.6 5.8G 40CH Diversity Receiver System For Fatshark Dominator Goggles RC Drone
Banggood.com
$59.99
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Discussion

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howboutdatFPV   Apr 22, 2020  

weird question, but how does this esc perform on 6s? ive got a 4s quad with one in it and am thinking about an upgrade

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