Marmod --- Lownoise Mod for the Marmotte DJI / Karearea 2207 Bi-Turbine

By MamaJOE on Apr 25, 2022

6  240  2

The story behind the build

This bulid evolved from my BITON build (https://rotorbuilds.com/build/28643).
This build was great, but I still had problems with uncommanded movments.
And as an engineer I just had to make it work...that's it.

Choice of components

The components are the same as in the Biton build, I just added some reinforcements to get rid of the vibrations and a GPS.
My idea was to strengten the arms to reduce the flex an therefore the shaking on the roll axis.
So I watched out for some suitable components and found the replacement arms for the Badger.
These should fit more or less to the arms of the Marmotte. I just took the 6" version to have a bit more length to fix them.
To fix the arms the centerplate of the Rooster seemed to be worth a try.

Building

This build was really great fun, because it was a lot work to customize all the carbon parts and make them fit together.
I did a lot of testing and modifications untill I was satisfied with the result.

Flight quality

I tried to remove as much as possible noise from this build.
So I reinforced the frame, supported the Immortal-T antenna with spring steel wires, used a Mamba interference shielding, added 2000 µF of low ESR capacitance, moved the battery under the quad to fix it to the fat Rooster centerplate, tuned the bearing play of the motors...and at the end it worked!
Ok, the downside is that it's more a tank than a flying machine - but it's incredible lownoise now and flies really great.
I'm able to turn off the dynamic notch filter and still push the PIDs. The bigger mass gives the quad some kind of "solid" flightfeel and I love it.
The only real downside is the reduced flighttime, because this battleship is at battery drainer.

Data

Weight with props: 525 g
AUW with 6S 1050 mAh: 705 g
AUW with 6S 1400 mAh: 751 g
Flight time (1400 mAh): approx. 3:00 to 6:00
v_max: 185 km/h (straight flight, with constant altitude)

Photos

Part List

Frame

Rooster Center Plate
Armattanquads.com
$9.00

Frame

Badger Arm 6 inch
Armattanquads.com
$5.25

Frame

Armattan Marmotte DJI Edition 5" Frame (8 builds)
N-factory.de
See Site

Flight Controller

SucceX-D F7 V2.2 TwinG Flight Controller (HD Version) (3 builds)
Shop.iflight-rc.com
$70.99

Flight Controller

Mamba interference shielding FPC (3 builds)
Diatone.us
$1.99

ESCs

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)
Aliexpress.com
$95.53

Motors

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

Propellers

Azure Power Vanover Limited Edition 5.1x4.5x3 POPO Compatible Tri-Blade 5" Prop 4 Pack - Choose Your Color (7 builds)
Racedayquads.com
$3.29

FPV Camera

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

Antenna

TBS Crossfire Immortal T V2 Antenna (149 builds)
Pyrodrone.com
$5.95

Antenna

DJI FPV Air Unit Antenna MMCX 90° 2PC (10 builds)
Customquads.com.au
$25.00

Receiver

TBS Crossfire Nano Rx - FPV LONG RANGE DRONE RECEIVER (1491 builds)
Team-blacksheep.com
$24.95

Batteries

Tattu R-line Version 4.0 1400mah 22.2V 6S1P 130C Lipo Battery - XT60 (15 builds)
Pyrodrone.com
$39.99

Batteries

Tattu R-Line Version 4.0 22.2V 6S 1050mAh 130C LiPo Battery - XT60 (21 builds)
Racedayquads.com
$33.99

Power Distribution

XT60 Male Pigtail 14AWG 80mm - BLACK
Impulserc.com
$4.08

Power Distribution

Diatone Sanyo 2000uF 35V Low ESR Kondensator Board mit 2 blauen LED (4 builds)
Fpv1.de
See Site

Radio

Boxer EdgeTX Rotor Riot Edition Radio Controller - ELRS (4 builds)
Rotorriot.com
$259.00

Radio

21700 5000mAh Battery for TX16S
Radiomasterrc.com
See Site

Goggles

DJI Goggles 2 - Ultra Low Latency 1080p/100FPS 4K/60FPS Digital HD FPV (22 builds)
Pyrodrone.com
$449.00

Hardware

2x n-Factory.de Kevlar Battery Straps rubberized 250x20
N-factory.de
See Site

Hardware

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

Misc Parts

FETtec Spike-Absorber (15 builds)
Fettec.net
$4.98

Misc Parts

Matek Lost Model Beeper & FPV FC 5V Loud Buzzer (34 builds)
Racedayquads.com
$3.59

Misc Parts

Mamba GPS/Beidou M8PLUS/M22 (2 builds)
Diatone.us
$16.99

Misc Parts

Plasti Dip Liquid Electrical Tape schwarz 118ml 4oz black (9 builds)
Plastidip-sale.com
$13.95

Battery Charger

2 x Power Genius SAFE Parallel board XT30 and XT60 2S to 6S with Fuse Protection (3 builds)
Pyrodrone.com
$19.98

Battery Charger

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

Battery Charger

ISDT PC-4860 Lipo Ladegerät Parallel Ladestation Unterstützung 4 Packs von 1-8S XT60 RC LiPo Akku
Amazon.de
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)
Hglrc.com
$29.99

Battery Charger

Q6 Nano Lipo Ladegerät, DC 200W Smart tragbares digitales Ladegerät fü
Isdtshop.com
$29.99

Battery Charger

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

Battery Charger

K2 Air Bluetooth Fernbedienung LIPO Ladegerät, AC/DC 200W/500WX2 20A S
Isdtshop.com
$122.99

Soldering Iron

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

Backpack

Tarion Pro PB-01 Professional Camera Backpack
Tarion.eu
$149.99

Accessories

ETHIX Heated Deluxe Lipo Bag V2
Team-blacksheep.com
$64.95

Accessories

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

Accessories

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

Accessories

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

Misc Supplies

Bier – Wikipedia
De.wikipedia.org
See Site
Show stores (23)

Discussion

Sign in to comment

MamaJOE   Sep 22, 2022  

Do you know Chris Rosser's analysis of the Marmotte frame? If not see my BITON build. Perhaps it will help to fix the battery under the quad?
Reinforcing the arms should work. But you should fix the reinforcement somehow in the middle of the frame.

DigitalLover   Sep 22, 2022  

hi can I have you FB please. I have a Gecko 4inch 4mm and it fly greet, the noise only from 200-300hz and easly to filter. unlike that Gecko, my Marmotte is totally shit compared to Gecko, I have think about buy more buttom arm to make it double thick or make a 6mm arm version. What do you think?

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