Biton --- Marmotte DJI / upside-down Holybro Metal ESC / Karearea 2207 Bi-Turbine

By MamaJOE on Dec 10, 2021

5  205  0

The story behind the build

This bulid evolved from my Black KISS build (
Here I actually planned already to use the Karearea TOA 2207 1980 KV Bi-Turbine motors, which wheren't available at this time.
After I got some, I had to update!
But with my Black KISS, I had bad problems in the meantime.
Overall it flew great, but it still had some twitches and uncommanded movments, what scared me.
I blamed the FC and/or ESC to be the problem, but I think I was was wrong...

Choice of components

The motors were already specified.
Than I really fell in love with this Holybro 65 A metal-monster ESC, so I want one.
The videosystem and the frame where the only things, I took from my old build.
For the FC I wanted a iFlight F7 with dual-gyro, because I already have one (mini) running and I love it.


This build was a bit boring, because I already made it once.
To complicate it a bit, I tried an upside-down mounted ESC, to have a special wire routing.
The mount of te Immortal T at the back turned out to be useful, so I did it again.
I didn't really like the cage for the cap and spike absorber, like I had it before. That's why I removed it and outsourced the component's into the back of the copter.

Flight quality

Well, it flies good...but I had the same problems (more or less) than before - uncommanded movements!
After some research, I'm pretty sure the problem is the frame or more it's vibration characteristics.
Find the answer here:

With a little bit more (precise) filtering, it flies good, but not that great what I expected of a quad, built of top notch components.

The Karearea motors also where a bit disappointing. The look worthy, got a lot of power (max. 3400 W for all four acc. to BF OSD) and work great. But two of five had a noticeable bearing clearance out of the box.
In BF these motors show acceleration forces > 1 g. Not really what I expect from a premium motor.


I found out, the bearing play is caused by too little axial prestress on the bearings.
So I shortend the drive shaft by some µm and now the motors are running perfectly smooth, without any play or additional heat generation.


Weight with props: 433 g
AUW with 6S 1050 mAh: 613 g
AUW with 6S 1400 mAh: 659 g
Flight time (1050 mAh): approx. 2:30 to 4:30
Flight time (1400 mAh): approx. 3:00 to 6:00
v_max: 175 km/h (straight flight, with constant altitude)


Part List


Armattan Marmotte DJI Edition 5" Frame (8 builds)
See Site

Flight Controller

iFlight SucceX-D F7 V2.2 TwinG FC (2 builds)
See Site


HOLYBRO Tekko32 F4 Metal 4in1 65A BLHELI32 128K ESC 4 6S 30.5X30.5mm for RC FPV Racing Freestyle Drones Replacement DIY Parts (10 builds)


4 x TOA BI-TURBINE 2207 (V2) | kareareadrone (2 builds)
See Site


Azure Power Vanover Limited Edition 5.1x4.5x3 POPO Compatible Tri-Blade 5" Prop 4 Pack - Choose Your Color (7 builds)

FPV Camera

Caddx DJI Digital HD FPV Air Unit Kit (289 builds)
See Site


TBS Crossfire Immortal T V2 Antenna (149 builds)


DJI FPV Air Unit Antenna MMCX 90° 2PC (10 builds)


TBS Crossfire Nano Rx - FPV LONG RANGE DRONE RECEIVER (1491 builds)


Tattu R-line Version 4.0 1400mah 22.2V 6S1P 130C Lipo Battery - XT60 (15 builds)


Tattu R-Line Version 4.0 22.2V 6S 1050mAh 130C LiPo Battery - XT60 (21 builds)

Power Distribution

Diatone Sanyo 2000uF 35V Low ESR Kondensator Board mit 2 blauen LED (4 builds)
See Site


Boxer EdgeTX Rotor Riot Edition Radio Controller - ELRS (4 builds)


21700 5000mAh Battery for TX16S
See Site


DJI Goggles 2 - Ultra Low Latency 1080p/100FPS 4K/60FPS Digital HD FPV (22 builds)


CopterFarm Super Sticky Cow Tongue Pad Batterie LiPo (7 builds)
See Site

Misc Parts

FETtec Spike-Absorber (15 builds)

Misc Parts

Matek Lost Model Beeper & FPV FC 5V Loud Buzzer (34 builds)

Misc Parts

Plasti Dip Liquid Electrical Tape schwarz 118ml 4oz black (9 builds)

Battery Charger

2 x Power Genius SAFE Parallel board XT30 and XT60 2S to 6S with Fuse Protection (3 builds)

Battery Charger

3 x BAT-Safe LiPo Tresor sicheres Laden und Aufbewahren der Akkus
See Site

Battery Charger

ISDT PC-4860 Lipo Ladegerät Parallel Ladestation Unterstützung 4 Packs von 1-8S XT60 RC LiPo Akku
See Site

Battery Charger

HGLRC Thor Lipo Battery Balance Charger Board Pro 40A XT60 XT30 Plug 2-6S Integrated with Lipo Discharger for IMAX B6 ISDT Q6 Na (2 builds)

Battery Charger

Q6 Nano Lipo Ladegerät, DC 200W Smart tragbares digitales Ladegerät fü

Battery Charger

2 x Amacoam 2 Stück Lipo Batterie Sicherer Beutel Feuerfeste Explosionsschutz Lipo Battery Guard Tasche Sack Gebühren Schutz Tasch
See Site

Battery Charger

K2 Air Bluetooth Fernbedienung LIPO Ladegerät, AC/DC 200W/500WX2 20A S

Soldering Iron

Tilswall Soldering Station, 65W Solder Station Welding Iron with Smart Temperature Control (392°F-896°F), Extra 5pcs Sol (2 builds)
See Site


Tarion Pro PB-01 Professional Camera Backpack


ETHIX Heated Deluxe Lipo Bag V2


Kesser® Campingstuhl faltbar klappbar tragbar Angel Stuhl Camping Stuhl Faltstuhl bis 120 kg Strandstuhl Angelstuhl Klapphocker
See Site


LINGHUANG Avata Tragbar Aufbewahrungstasche für DJI Avata für DJI Goggles 2 für Motion Controller, Tragetasche Schutzhülle f
See Site


Onseuk Kompatibel mit DJI AVATA Goggles 2 Foam Pad Sponge Comfortable Eye Mask Drone Goggles Zubehör (Grau+Schutzhülle)
See Site

Misc Supplies

Bier – Wikipedia
See Site
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