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 (281 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 (1479 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


RadioMaster TX16S Multi-Protocol RF Module OpenTX 2.4GHz RC Transmitter w/ V3 Hall Gimbals (93 builds)


21700 5000mAh Battery for TX16S
See Site


URUAV V2 3 in 1 Dust-proof Shading Sheet Protective Lens Cover for DJI Digital FPV Googles


DJI Digital HD FPV Goggles (141 builds)


iFlight Crystal HD Patch 5.8GHz RP-SMA Antenna for DJI - LHCP - Choose Your Design (4 builds)


2 x Double Quad RX Black Edition LHCP RP-SMA male speziell fr DJI HD FPV System (2 builds)
See Site


CNHL 18650 DLG 4S1P 3200mAh 14.8V 3C Li-ion Long Range Pack XT60 Plug


Replacement DJI FPV Goggles Sponge Foam Padding


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)

Radio Module

TBS Crossfire Micro TX V2 (43 builds)
See Site

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

Battery Charger

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

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

Soldering Iron

K2 Air - ISDT
See Site


Skyreat Hard Carrying Case for DJI FPV V2 Goggles


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

Misc Supplies

Bier – Wikipedia
See Site
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