Source One v3 7" HD Deadcat - DJI Air Unit

By wrong17 on Jul 02, 2021

16  437  3

This build is inspired by the multi color TPU 3D printing that I started to do. I used my favorite platform, the TBS Source One v3 frame with 7" deadcat arms.

Maiden Flight

3D Printing the TPU Parts:

I used Cura v 4.9.1 to slice the STL files and for the filament change (Extensions > Post Processing > Modify G-Code > Filament Change).
Since I only have a single printhead 3D printer, I have a manually switch filaments every time I change colors. So, it took a while to print some of these parts.

When printing with a .3 layer height, here are the specific layers where I changed the filament colors.
It is very important that you set the layer height to .3 or else the numbers I list below will not work for you.

TBS_Source_One_Arm_Protector_1_SLIM v11 Done.stl
Green
07 Black
09 Blue
16 Black
18 Green
30 Black
32 Blue

SQUIRT_DJI_CAM_MOUNT_with_gopro_v4.stl
Green
9 Black
11 Blue
16 Black
18 Green

XT60 v4 GPS.stl
35 black
37 blue
62 black
64 green
90 black
92 blue
132 black
134 green

Squirt GP 25deg Mount v17.stl
Green
22 Black
24 Blue
41 Black
43 Green

Quad Setup

For the PIDs and Filter setting please take a look at the image gallery for the screen shots. In addition to those settings I also have Bidirectional DShot turned on and the following Betaflight presets applied:

HD (smoothed FF for HD cameras, strong low turn rate smoothness, low iterm relax to minimise bounce back)

set iterm_relax_cutoff = 10
set rc_smoothing_auto_smoothness = 20
set ff_interpolate_sp = AVERAGED_3
set ff_smooth_factor = 40
set ff_spike_limit = 55
set ff_boost = 0
set feedforward_transition = 40
set yaw_lowpass_hz = 70
set throttle_boost = 5
set throttle_boost_cutoff = 10
set dyn_lpf_dterm_curve_expo = 7
set gyro_rpm_notch_q = 800

Vbat Compensation

set vbat_sag_compensation = 100
set vbat_pid_gain = off

Photos

Part List

Frame

RDQ Source One V3 7" Long Range Frame - 6mm V0.2 DeadCat Arms (15 builds)
Racedayquads.com
$29.97

Flight Controller

Hobbywing XRotor Micro 3-6S 30x30 Stack/Combo (F4 FC / 32Bit 60A 4in1 ESC) (13 builds)
Racedayquads.com
$79.99

Motors

4 x EMAX ECO II 2807 Brushless Motor - 1300KV (5 builds)
Newbeedrone.com
$67.96

Propellers

HQProp DP 7X3.5X3 V1S PC Propeller (Set of 4) (5 builds)
Newbeedrone.com
$3.59

FPV Camera

Caddx DJI Digital HD FPV Air Unit Kit (243 builds)
Getfpv.com
$189.99

Antenna

iFlight Albatross 5.8GHz LHCP RP-SMA FPV Antennas (Set of 2pcs) (3 builds)
Helidirect.com
$13.99

Receiver

TBS Crossfire Nano RX Special Edition FPV LONG RANGE DRONE RECEIVER (132 builds)
Pyrodrone.com
$29.95

Radio

Team BlackSheep TBS TANGO 2 V3 PRO RC RADIO (74 builds)
Heli-nation.com
$199.99

Goggles

DJI Digital HD FPV Goggles (109 builds)
Getfpv.com
$529.00

3D Printed

TBS Source One v3 HD Kit w/ XT60 Antenna GPS Mount - Caddx Vista Nebula Pro Holder - GoPro 5/6/7 & 9 Mount by wrong17
Thingiverse.com
See Site

HD Camera

GoPro HERO8 Black - Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 1080p Live Streaming Stabilization (19 builds)
Amazon.com
$348.99

HD Camera

GoPro Hero7 Black — Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 720p Live Streaming Stabiliza (21 builds)
Amazon.com
$259.99

HD Camera

BETAFPV Naked GoPro Hero 6 Black for Beta95X Cinewhoop Drone Quadcopter
Ebay.com
$219.99

Hardware

2 x Drone Tools for - RaceDayQuads (2 builds)
Racedayquads.com
$59.98

Misc Parts

DJI FPV Goggles Air Unit MMCX elbow to SMA Cable Part 07
Helidirect.com
$9.00

Misc Parts

TBS M8-2 GPS Glonass
Newbeedrone.com
$10.50

Battery Charger

HOTA D6 PRO Dual Charger AC200W/DC650W 15A w/ Wireless Cellphone Charging (9 builds)
Pyrodrone.com
$118.00

Soldering Iron

TS100 Portable Programmable Smart Soldering Iron (248 builds)
Racedayquads.com
$58.99

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

iFlight Crystal HD Patch and Stubby 5.8GHz RP-SMA Antenna Set for DJI - LHCP - Carbon
Racedayquads.com
$56.99

Accessories

FuriousFPV Smart Power Case V2
Helidirect.com
See Site

Misc Supplies

Armattan 3M Dog Bone Foam Landing Pads - 4 PiecesDefault Title (4 builds)
Racedayquads.com
$1.25
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Discussion

Sign in to comment

gitareest   Sep 21, 2021  

You've made beautiful build! So clean and steady!
How do you like 1700kv motors with 6s battery? How much current is there? Especially during power loops (cool rip on the video btw)?
It seems you use Betaflight? Could you please share your config?
Also could you please specify weight? Would be much appreciated.

wrong17   Sep 21, 2021 

Thanks. Take a look at this build I did that has a lot more info about weight. https://rotorbuilds.com/build/16878 The weight of this build (yellow blue & black stripes) is a bit more than my other 7" inch because of all the TPU, DJI air unit, and dual Antenna (I sold this quad so I can not get the exact weight for you). Some of my other builds ranges between 480g to 550g dry (not including the GoPro or battery).

As for 1700kv motors on a 6s 7" build, I think the KV is way too high. I tried using 2507 1850kv motors on a 7" Floss 3.0 frame and end up setting a throttle output limit to 70%. That would make the motors similar to 1300KV. You can check out that build here: https://rotorbuilds.com/build/25691

I am not really sure what the amp draw is during a power loop. In the past when I was using an analog system, i was able to record everything on the OSD. Since I am using DJI now, none of that info is saved. The only time I pay attention to amp draw is when I fly with a Lithium Ion battery, so I normally do not pay attention to it, sorry.

Sure, I can share my PIDs and Filters setting. Give me sometime to pull that off the quad.

wrong17   Sep 21, 2021 

I just added the PIDs and Filter setting screen shots and Betaflight presets to this build.

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