TBS Source One Slammed with 7" v0.1 Arms

By wrong17 on Jun 07, 2019

10  894  18

This build took me longer because I got distracted with the 3D printed I just bought, so it took me about 2 months before I finished it. I came across this brand-new frame on RCG and picked it up for a good deal ($20 shipped). It did not matter to me that it was version .1 and not the .2 because all I cared about is the optional 7” arms that was included. The 5” version of this frame only cost $26.99 and to upgrade to the 7” all you need to buy is the longer arms, which cost $24.95.

The first thing I did after receiving the frame was to replace the original 30mm standoff to 20mm. By doing this I hope to lower the CG because the battery is top mounted. The problem with slamming the frame is that I only have enough room for one board on the 30x30 mount. Typically, there is lots of space to work with but the 6mm thick arms and supporting plate is stuffed inside the 20mm space, so now there is not much room left. That is why I went with a Mateksys F405-CTR that has built in PDB that supports individual ESC.

Initially I was planning to use a set of Hypetrain Ummagawd v1.1 2306 2150KV motors but I came across a set of Iflight Xing 2208 2150kv motor on RCG that might be a better fit for a long-range quad. That is why I had to reprint all the TPU Parts from Blue to Green, so it can match the motors.

Another thing I got hung up on was how I should mount the ESC. Typically, you would mount it on the top of the arm because it is the most direct path, however I learned the hard way that props 6” and up are more prone to prop strike. I never had this issue with my 5” quads but I starting to see it more on the 6.” So, for this build I wanted to run the ESC on the bottom of the arms. But I do not like how power wire is so exposed on the bottom of the quad.

My maiden flight was a disaster. I flew 3 packs and crashed all 3 times. The first was nothing serious, I power loop in to a volleyball net. The second was a quad killer crash in to the concrete floor. I totally forgot to tighten the motors screws when I was building it. I only hand tighten them, so I could solder them to the ESC. Right after I did a punch out one of the motors fell off and the quad tumbled out of control towards the homes. I was fortunate enough that it missed the solar panels that were on the roof of the homes.

I think I am sold on these setup, not only does it fly well but it is taking all my crashes like a champ. I thought the first crash with the motors falling off and crashing in to someones house, it would have broke one of the motors. You can see on one of the motor bell that it hit something hard, but it still spins true and runs well. Even though it is bigger and heavier than my 5" and 6" quads, this guy feels a better than some of my smaller freestyle quads.
Here are 2 videos showing you DVR and HD footage so you can get an idea how the XING 2208 2150kv motors handle the 7" props:
Gopro 7 Black

Fatshark DVR


Part List


Team BlackSheep TBS SOURCE ONE 5" V0.3 FPV Frame (81 builds)


Team BlackSheep TBS Source One 7" Replacement Arms | Heli-Nation.com

Flight Controller

Matek F405-CTR Flight Controller (11 builds)


4 x Individual ESCs (3 builds)


iFlight XING 2208 1700/1800/2150KV Brushless Motors 2-6S For RC Drone ESC P2


HQProp Durable Prop 7X3.5X3V1S Black (2CW+2CCW) - Poly Carbonate

FPV Camera

Foxeer Falkor 2 Micro FPV Camera - 1.8mm Lens - 1200TVL 16:9/4:3 PAL/NTSC G-WDR - Choose Your Color (60 builds)


Menace RC Pagoda 'Raptor' Antenna (RHCP) (3 builds)


Team BlackSheep TBS Crossfire Nano RX - Heli-Nation (514 builds)


RDQ Series 18.5V 5S 1300mAh 100C LiPo Battery - XT60 (7 builds)


FrSky Horus X10 Radio (Amber)


FatShark Dominator HDO OLED FPV Goggles & ImmersionRC rapidFIRE 5.8GHz Goggle Module w/ Analog PLUS COMBO | Heli-Nation.com (2 builds)


DJI Digital HD FPV Goggles (32 builds)

HD Camera

GoPro HERO7 Black Action Camera (60 builds)

Misc Parts

Ummagawd UMMAGRIP Universal Super Sticky Battery Pad (120 builds)

Misc Parts

RDQ Micro M8N GLONASS GPS Module (41 builds)

Misc Parts

Capacitor Vanity Label - NOSYes (4 builds)

Misc Parts

Panasonic 1000uF 35V Low ESR Capacitor for ESC Noise Reduction (101 builds)

Misc Parts

TBS Source One GoPro Hero Mount by SelectaMota
See Site

Misc Parts

TBS SOURCE ONE 7" Arm Guards v0.1 by wrong17
See Site

Misc Parts

See Site

Video Receiver

ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (124 builds)

Radio Module

TBS Crossfire TX - Long Range R/C Link (10 builds)

Battery Charger

HOTA D6 PRO Charger AC200W DC650W 15A (4 builds)

Soldering Iron

TS100 Portable Programmable Smart Soldering Iron (135 builds)


Lowepro QuadGuard BP X3 - Drone Backpack for 4 FPV Quad Racing Drones and 15" Laptop w/Exterior Mounts (Black)
Show stores (8)


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miasmafpv   Oct 24, 2019  

Nice man! Love the black a green. where did you find that fpv cam holder? i have a falkor2 aswell and am in the process of tryi g to find something to make it fit my source one.

wrong17   Oct 24, 2019 

Thanks, I 3D printed the camera mounts from Thingiverse. Here is a link for the STL files: https://www.thingiverse.com/thing:3064253

ElGargamel   Sep 09, 2019  

How is the GPS doing so close to the VTX Antenna? Any interference or working well for you? I'm also thinking about a mount like that, but I wonder if for mid-long range it's not better to have it vertically mounted instead of horizontal?

wrong17   Sep 09, 2019 

To be honest, I never got my GPS working. I bought the GPS used, so I am not 100% sure if it is my betaflight setup, wiring or the modules that is the problem. I never trouble shooted the issue, so I am not sure if the the GPS being too close to the VTX antenna can be an problem. I never hear much about people complaining about the VTX antenna being too close to the GPS so I only assume it should be fine. When you say mountiing it vertically instead of horizontal, are you talking about the GPS or VTX? I thought the only option to mount the GPS is to point the top twords the sky.

ElGargamel   Sep 16, 2019 

The RX antenna :-)

Thomaat   Jun 07, 2019  

Looking good! What mm are those stand-offs?

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wrong17   Jun 14, 2019 

I only reccord in 4k 60fps so I do not have an option to pick superview. Let me drop my frame rates to 30 and try superview.

wrong17   Jun 14, 2019 

The answer to your question is yes, you will get props in superview. However, it is possible to use a 40 degree angle GoPro mount to get rid of the props. I am currently using 30 degree mounts. I did remix my current GoPro mount because I wanted more material around the lens. After my first crash the case did a pretty good job in protecting my GoPro but I did a chip on the lens protector.

wrong17   Jun 14, 2019 

Here is a video with the GoPo 7 Black set in 4K 30fps Superview:

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