HSKRC "Mavic", 3S3P Li-Ion, 1h hover

By ledimestari on Apr 02, 2020

57 2,614 14

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:

A new record flight time:

Photos

Part List

Frame	HSKRC X328 328mm 8 Inch Frame Kit compatible DJI Mavic Motor 20x20/30.5x30.5mm Hole 105g for RC Drone Banggood.com	$23.32
Flight Controller	Kakute F7 Mini 20x20 Flight Controller (12 builds) Getfpv.com	$33.00
ESCs	20x20mm Flywoo GOKU 406S 40A BL_32 2-6S DShot1200 4in1 Brushless ESC for Cinewhoop RC Drone FPV Racing (5 builds) Banggood.com	$57.35
Motors	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 Aliexpress.com	See Site
Propellers	2 x 1Pair Original 8331 Propeller Low-Noise Quick-Release Propeller Blade For DJI Mavic Pro Platinum Banggood.com	$23.02
FPV Camera	Caddx Turbo Micro F2 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera W/ Microphone (41 builds) Banggood.com	$20.99
FPV Transmitter	HGLRC GTX NANO 5.8G 48CH BFOSD 0mW/25mW/50mW Switchable NTSC/PAL FPV Mini Transmitter (20 builds) Banggood.com	$11.81
Antenna	Lumenier AXII U.FL 5.8GHz Antenna (RHCP) (148 builds) Getfpv.com	$14.99
Receiver	TBS Crossfire Nano Rx - FPV LONG RANGE DRONE RECEIVER (1500 builds) Team-blacksheep.com	$24.95
Batteries	9 x 18650 Murata (Sony) VTC6 li-ion akkukenno - Ei suojapiiriä - Flat-top (10 builds) Akkula.fi	$125.55
3D Printed	HSKRC X328 Mount for BN-880Q and immortal-T by Ledimestari Thingiverse.com	See Site
Hardware	Suleve™ MXSS2 M2/M2.5/M3 Stainless Hex Socket Cap Head Screws Allen bolt Nut Assortment Kit 300pcs Banggood.com	$7.79
Misc Parts	Beitian BN-880Q GPS+GLONASS Dual GPS Antenna Module FLASH TTL Level 9600bps for FPV Airplane RC Racing Drone (6 builds) Banggood.com	$14.99
Misc Parts	Panasonic 1000uF 35V (FC-Series) Low-ESR Capacitor for ESC Noise Reduction (121 builds) Racedayquads.com	$1.55
Radio Module	Team BlackSheep TBS Crossfire TX LITE (4 builds) Heli-nation.com	$149.99

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Discussion

kwasisiaw47@gmail.com Oct 04, 2023

Hi, does anyone have the CAD files to this frame ?

makesomemore_ Apr 25, 2021

awesome build!, whats it weight?

truog2003 Aug 20, 2020

hello, beautiful build, cool ... I´m building a quad with a similar setup (motor, propeller and batteries) but I will use a customized version of TBS source one (390mm and motor mount hole for mavic motor), it is already coming... in terms of flight, do you use 100% acceleration with these batteries?

Minichado Apr 04, 2020

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

Show 2 more comments

ledimestari Jun 25, 2020

I only have one Hero 7 Black and I ain't gonna strip that, but I could try with that or with some specified dummy weight if you're interested.

Whiffles Jun 25, 2020

No need. Have you tried carrying the Hero7?

ledimestari Jun 26, 2020

not yet, I'll make a mount for it now that I have achieved my goal of over 1 hour flight time.

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.

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