HSKRC "Mavic", 3S3P Li-Ion, 52min hover

By ledimestari on Apr 02, 2020

28  809  7

The maiden flight of this thing lasted 52 minutes. It was like 1c outside and my fingers were freezing.

I found this frame and motors on aliexpress and knew that I wanted to build this. After that, my goal was to have a copter with same weight than DJI Mavic Pro, but with three times the battery capacity. This build ended up being just a little heavier than Mavic Pro but I don't know where I could save any more weight.

INAV 2.4.0 on 7" endurance preset held it very well in place for the whole 52 minutes. It kind of lost the position only once when I had to take it to manual control just to set it to POSHOLD again.

Theoretically the copter is loaded with 10120 mAh of li-ion. After 52mins, 7030mAh was drawn. and then the copter could not stay in air any longer.

Build timelapse video:

Maiden DVR video:

Video about soldering li-ion battery:


Part List


HSKRC X328 328mm 8 Inch Frame Kit compatible DJI Mavic Motor 20x20/30.5x30.5mm Hole 105g for RC Drone

Flight Controller

Kakute F7 Mini 20x20 Flight Controller (7 builds)


20x20mm Flywoo GOKU 406S 40A BL_32 2-6S DShot1200 4in1 Brushless ESC for Cinewhoop RC Drone FPV Racing


US $25.64 26% OFF|4pcs DJI Mavic Pro Accessories 2008 1400kv Motor Mavic Pro Motor Arm Replacement Kits CW CCW Spare Part For DJ
See Site


2 x 1Pair Original 8331 Propeller Low-Noise Quick-Release Propeller Blade For DJI Mavic Pro Platinum

FPV Camera

Caddx Turbo Micro F2 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera W/ Microphone (37 builds)

FPV Transmitter

HGLRC GTX NANO 5.8G 48CH BFOSD 0mW/25mW/50mW Switchable NTSC/PAL FPV Mini Transmitter (20 builds)


Lumenier AXII U.FL 5.8GHz Antenna (RHCP) (148 builds)


TBS Crossfire Nano RX - FPV Long Range Drone Receiver (568 builds)


9 x 18650 Murata (Sony) VTC6 li-ion akkukenno - Ei suojapiiriä - Flat-top (8 builds)

3D Printed

HSKRC X328 Mount for BN-880Q and immortal-T by Ledimestari
See Site


Suleve™ MXSS2 M2/M2.5/M3 Stainless Hex Socket Cap Head Screws Allen bolt Nut Assortment Kit 300pcs

Misc Parts

Beitian BN-880Q GPS+GLONASS Dual GPS Antenna Module FLASH TTL Level 9600bps for FPV Airplane RC Racing Drone (4 builds)

Misc Parts

Panasonic 1000uF 35V Low ESR Capacitor for ESC Noise Reduction (106 builds)

Radio Module

Team BlackSheep TBS Crossfire TX LITE (4 builds)
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KwadGoneMadFPV   Apr 14, 2020  

any dvr pls ?

ledimestari   Apr 18, 2020 

one of the videos is full dvr

malpom   Apr 11, 2020  

Hi good mornig at alll some peaople have try this motor whit 4S?

sergetania   Apr 02, 2020  

52 minutes is mind blowing! It's a very cool experiment but what do you do for 52 minutes while it's flying!? 😱😂

ledimestari   Apr 05, 2020 

I did a lot of things while it was flying, took pictures and videos of it, setup telemetry data to display on my transmitter, googled things on my phone like what is the max output of the cells and other stuff like that. And walked around to keep myself warm.

Minichado   Apr 04, 2020  

very awesome! any payloads planned or just planned as a long range cruiser?

ledimestari   Apr 05, 2020 

This thing was built just to fly as long as possible. I haven't planned any payloads for it but feel free to suggest if you have something light and useful in mind :)

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