Black Marmotte

By Rickard on Aug 09, 2021

2  260  0

Built this quad using some new parts and some old parts from a 3 inch 4S quad. Old DJI air unit & camera, old FC & ESC with new frame, new 2306 1700KV motors and some 6S batteries. The 40A 20x20 ESC did break after only a few flights. The blackbox data showed really noisy/spiky gyro signals right when the ESC broke, which could have been causing extra stress on the ESC. Switched out the 4in1 ESC to a larger 30x30 50A ESC, also 4in1, which has held for many flights. (The Marmotte frame has 20x20 mounting holes, but they are M3 size.)

The quad suffered from mid throttle oscillations. Around 45% to 50% throttle the gyro signal was very noisy and the quad would shake (notable through the FPV feed). At both low and high throttle, the quad flew fine with smooth gyro signals. Increasing the ESC PWM frequency from 24kHz to 48kHz completely removed the mid throttle oscillations and extra noise to the gyro. Better gyro signal at all throttle levels allowed for more aggressive tune and now the quad flies great.

I wanted to use the FPVCycle Imperial motors, but since they were out of stock I went with Emax ECO II instead. The look of the ECO II fit well with the Marmotte.

Mounting the GoPro with only a Ummagrip and a strap is not the best method, but it is simple, easy to remove and works ok.

Photos

Part List

Frame

Marmotte DJI Edition (12 builds)
Armattanquads.com
$114.00

Flight Controller

iFlight SucceX-D TwinG Stack (F7 50A 2-6S) for DJI HD FPV system
Unmannedtechshop.co.uk
See Site

Flight Controller

iFlight SucceX-D Mini TwinG Stack (F7 40A 2-6S) for DJI HD FPV system
Unmannedtechshop.co.uk
See Site

Motors

4 x EMAX ECO II Series 2306 1700Kv Motor (33 builds)
Racedayquads.com
$63.96

Propellers

HQ Prop Durable 5.1x3.6x3 Tri-Blade 5" Prop 4 Pack - Grey (3 builds)
Racedayquads.com
$3.60

Propellers

Gemfan Hurricane 51433 Durable Tri-Blade 5" Prop 4 Pack - Choose Your Color (34 builds)
Racedayquads.com
$3.29

FPV Camera

Caddx DJI Digital HD FPV Camera (164 builds)
Getfpv.com
See Site

FPV Transmitter

DJI Digital HD FPV Air Unit Module (121 builds)
Getfpv.com
See Site

Antenna

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

Batteries

Tattu R-Line Version 4.0 1300mAh 6S1P 130C Lipo Battery (19 builds)
Getfpv.com
$39.99

Radio

DJI Digital FPV Remote Controller - Mode 2 (60 builds)
Racedayquads.com
$209.29

Goggles

FPV Drone Parts for – FPV Quad Drone Shop – Drone Racing Store (131 builds)
Racedayquads.com
$165.99

HD Camera

GoPro Hero7 Black — Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 720p Live Streaming Stabilization (26 builds)
Amazon.com
$298.00

Misc Parts

5 PCS Super Loud 5V Active Alarm Buzzer Beeper Tracker 9*5.5mm for RC MultiRotor FPV Racing Drone (15 builds)
Banggood.com
$6.99

Misc Parts

Ummagawd UMMAGRIP Universal Super Sticky Battery Pad (175 builds)
Racedayquads.com
$4.99

Misc Parts

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

Misc Parts

5M 6mm Wide TIGHT Braided PET Expandable Sleeving Cable Wire Sheath Black/Silver/Gold/Red/Orange/Yellow/Green/Blue/White/Clear (2 builds)
Aliexpress.com
$3.25

Battery Charger

Imax RC Ladegerät Battery Charger Imax B6AC + schwarz (3 builds)
Asmc.de
See Site

Backpack

QuadGuard TX Case
Lowepro.com
See Site

Accessories

Camera Butter Glass ND filter for GoPro Hero 5/6/7 (Choose Density) (5 builds)
Pyrodrone.com
$9.99

Accessories

Lumenier AXII HD DJI FPV LHCP Combo Set
Droneit.se
$873.60

Accessories

Jumper T16 Stick Ends Rocker (M3)
Unmannedtechshop.co.uk
See Site
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