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

By MamaJOE on Apr 25, 2022

5  198  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 (8 builds)
N-factory.de
$106.46

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 (5 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 (168 builds)
Getfpv.com
See Site

Antenna

TBS CROSSFIRE IMMORTAL T V2 ANTENNA (125 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 (1331 builds)
Team-blacksheep.com
$24.95

Batteries

Tattu R-line Version 4.0 1400mah 6S 130C Lipo Battery Pack (12 builds)
Pyrodrone.com
$39.99

Batteries

Tattu R-Line Version 4.0 22.2V 6S 1050mAh 130C LiPo Battery - XT60 (19 builds)
Racedayquads.com
$33.99

Power Distribution

XT60 Male Pigtail 14AWG 80mm - BLACK
Impulserc.com
$3.80

Power Distribution

Diatone Sanyo 2000uF 35V Low ESR Kondensator Board mit 2 blauen LED (4 builds)
Fpv1.de
$1.95

Radio

RadioMaster TX16S Multi-Protocol RF Module OpenTX 2.4GHz RC Transmitter w/ V3 Hall Gimbals (82 builds)
Racedayquads.com
$199.99

Radio

21700 5000mAh Battery for TX16S
Radiomasterrc.com
See Site

Goggles

URUAV V2 3 in 1 Dust-proof Shading Sheet Protective Lens Cover for DJI Digital FPV Googles
Uruav.com
$7.55

Goggles

DJI Digital HD FPV Goggles (125 builds)
Getfpv.com
$529.00

Goggles

iFlight Crystal HD Patch 5.8GHz RP-SMA Antenna for DJI - LHCP - Choose Your Design (4 builds)
Racedayquads.com
$44.99

Goggles

2 x Double Quad RX Black Edition LHCP RP-SMA male speziell fr DJI HD FPV System (2 builds)
Antennenfreund.de
$48.82

Goggles

Replacement DJI FPV Goggles Sponge Foam Padding
Shop.iflight-rc.com
$11.99

Goggles

Ersatz Akku Li-Ion 4,4Ah (4 * 18650 Akku) + Tasche für Magicshine.eu - bikelight.eu - LED-Fire.com und andere LED-Lampen mit 7,
Amazon.de
$0.98

Hardware

2x n-Factory.de Kevlar Battery Straps rubberized 250x20
N-factory.de
$8.55

Hardware

CopterFarm Super Sticky Cow Tongue Pad Batterie LiPo (6 builds)
Copterfarm.de
$5.81

Misc Parts

Matek Lost Model Beeper & FPV FC 5V Loud Buzzer (33 builds)
Racedayquads.com
$5.49

Misc Parts

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

Misc Parts

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

Misc Parts

Plasti Dip Liquid Electrical Tape schwarz 118ml 4oz black (8 builds)
Plastidip-sale.com
$13.95

Radio Module

TBS Crossfire Micro TX V2 (43 builds)
Getfpv.com
See Site

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

2 x BAT-Safe LiPo Tresor sicheres Laden und Aufbewahren der Akkus
Amazon.de
$117.18

Battery Charger

2 x Amacoam 2 Stück Lipo Batterie Sicherer Beutel Feuerfeste Explosionsschutz Lipo Battery Guard Tasche Sack Gebühren Schutz Tasch
Amazon.de
$44.90

Battery Charger

ISDT D2 Mark 2 200W 12A Netzteil Lipo Akku Batterie Balance Ladegerät Entlader AC DC Dual für Rc Modelle 1-6S Li-ion Life NiCd
Amazon.de
$117.10

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
$48.82

Backpack

Skyreat Hard Carrying Case for DJI FPV V2 Goggles
Getfpv.com
$19.99

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
$32.03
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Discussion

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MamaJOE   8 days ago  

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   8 days ago  

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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