Floss 3.0 w/ DJI FPV System

By wrong17 on Apr 02, 2020

13  317  2

The Build
This is my second DJI FPV system build and once again I used the 3D printed parts that was designed by M490fpv (https://www.thingiverse.com/M490fpv/designs). But I had to do some modification because I plan to use a 4in1 esc instead of individual esc on the arms. I still went with this design because I like how the camera in pushed forward and up higher on the frame. But this also causes an issued because I now need more clearance for the props. So M490fpv suggested to use 6” arms to solve this problem.

The most difficult part of this build is keeping the stack as low as possible. I was hoping to use 30mm standoffs for the height of the frame and why test fitting everything it seemed possible. I 3D printed some spacers on the bottom of the ESC as a safety precaution so the electronics will not short out if it ever touched the aluminum bottom plate. I did the same for the FC too because there are a few capacitors that rests on top of the aluminum heat sink of the 4in1 ESC. I think I would have made this goal if I removed the aluminum heatsink that is on the Talon 4in1 ESC. But in the end the fit was to tight for my liking, so I end up using 35mm standoff instead. The 5 extra millimeters of space gave me all the room I needed and not worry about the electronics shorting out. So, in the pictures below I no longer need to cut the holes or notch out of the 3D printed DJI AIR unit holder.

After moving on to the 35mm standoff method, the position of the Air Unit was not ideal for my setup so I made a few modifications to the 3D models.
I remixed the Bottom Plate to move the Air Unit further up so there is more room for the antennas. The holes for the standoff was made smaller and now it holds in place without sliding up and down. So now I do not need to use the 10mm spacers. And finially I added a notch to the rear of the Bottom Plate, so the DJI Air Unit’s power cable can feed through from the back.

I am not a fan of MMCX connectors because the cabling they use with it is usually so stiff. For the Antenna Holder I modified the 3D file by removing material where the cable exits the hole. This will give the antenna more space to make the tight turn in the limited spacing.

Finially, the Motor Wire Cover which is not and part that was designed by M490fpv but was taken from a different quad. I reduced the size of the wire cover to fit the Floss’ thin arms.

I included the links for both the original and my remix 3d printed files in my parts list below.

Maiden Flight
The first few flights were good, and the stock Betaflight v4.1.5 PID's and Rates were nice and smooth. But I did not have too much confidence with it yet. I used the similar setup I had with the Floss 2.0 with 2207 Blaster 2450kv motors and Gemfan Hurricane 51466 props. But it did not fly the same because it seems to lack the trust and grip in the air while cornering.

So, I went back to my favorite Gemfan Flash 5552 props that like use on my 6” frames. On my first test flight it was a night and day difference. I got back all the things that was missing with the Gemfan Hurricane 51466 props. In the description for the 51466 props it states “Really great for overall general 5” quad use. High weight won’t perform as well as something that’s around 600g AUW or less.” I am pushed close to 600g when I am using a 1500mah lipo, so that might be the reason why I do not see the same performance is my lighter Floss 2.0.

Photos

Part List

Frame

Hyperlite Floss 3.0 Race Frame "HYBRID" (7 builds)
Pyrodrone.com
$44.99

Flight Controller

Mini Flight Controllers (20x20) (13 builds)
Racedayquads.com
$41.59

ESCs

Talon Gigawatt V2 4in1 20x20 35A 6S ESC (7 builds)
Heli-nation.com
$59.99

Motors

Hypetrain Blaster 2207 2450KV Motor (15 builds)
Rotorriot.com
$26.95

Propellers

Gemfan Durable 5552 Tri-Blade 5.5" Prop 4 Pack - Choose Your ColorClear (18 builds)
Racedayquads.com
$3.85

Propellers

Gemfan 51466x3 Hurricane Durable (4pcs) MCK (38 builds)
Pyrodrone.com
$3.29

FPV Camera

DJI Digital HD FPV Air Unit (85 builds)
Getfpv.com
$179.00

Receiver

TBS Crossfire Nano RX - FPV Long Range Drone Receiver (568 builds)
Team-blacksheep.com
$24.95

Batteries

CNHL MiniStar 1500mAh 4S 14.8V 120C Lipo Battery (19 builds)
Chinahobbyline.com
$26.49

Radio

FrSky Horus X10 Radio (Amber)
Getfpv.com
$375.99

Goggles

DJI Digital HD FPV Goggles (46 builds)
Getfpv.com
$529.00

3D Printed

Floss 3 6" DJI digital system installation parts by M490fpv
Thingiverse.com
See Site

3D Printed

Floss 3.0 DJI FPV System Parts by wrong17
Thingiverse.com
See Site

HD Camera

GoPro HERO7 Black Action Camera (67 builds)
Getfpv.com
$399.99

Misc Parts

2 x Replacement 6" Floss 3.0 arm
Pyrodrone.com
$8.50

Misc Parts

2 x 4MM ARM BRACE FLOSS 3.0 (choose size) (2 builds)
Pyrodrone.com
$7.98

Video Receiver

ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (129 builds)
Getfpv.com
$149.99

Radio Module

TBS Crossfire TX - Long Range R/C Link (11 builds)
Getfpv.com
$208.99

Battery Charger

HOTA D6 PRO Charger AC200W DC650W 15A (6 builds)
Pyrodrone.com
$119.00

Soldering Iron

TS100 Portable Programmable Smart Soldering Iron (145 builds)
Racedayquads.com
$51.29

Backpack

Lowepro QuadGuard BP X3 - Drone Backpack for 4 FPV Quad Racing Drones and 15" Laptop w/Exterior Mounts (Black)
Amazon.com
$286.00

Accessories

BoYz analog bay v2 for DJI FPV goggles
Themakerboyz.com
$23.98

Accessories

Analog FPV FatShark Module Adapter V2 for DJI Digital FPV Goggles
Pyrodrone.com
$11.99

Accessories

FuriousFPV Smart Power Case V2
Helidirect.com
See Site
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Discussion

Sign in to comment

Atomic   Apr 03, 2020  

how did you adjust the camera to work at a 90' angle

wrong17   Apr 03, 2020 

Sorry for the confusion, I notice I have one picture with the camera in the 90-degree positioned. I was just test fitting the camera without removing the screws.

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