RNGR - Source One 7" Long Range

By fly.615 on Jan 31, 2020

15  782  5

Wanted to build a long range setup for a while, after several months I finally feel like I have it built the way I want.

Initially wanted the Deadcat arms of the Source One, but was out of stock. So I went with X configuration and crossed fingers I wouldn't see props. Few test hovers fortunately didn't have any in view! Initially used a Spedix IS30 4-in-1 that I had in the drawer with varying 4s battery configurations and had voltage sags/brownouts at high-throttle. Making the move to 5s seemed logical and I'll likely experiment with Li-Ion packs before too long. Still relatively a work in progress!

Had to dial in some video/osd gremlins with the icons not being correct and interferance issues. A quick font reload and adding a shield between ESCs and VTX made great improvements.

Next on the list is working out battery life and doing some prop comparison between 7x4x3, 7x3x3, or bi-blade 7x4.5. Hoping to get 10-15 minutes of easy cruising.

Scales show dry weight of 630g and a hefty 923g AUW with RDQ 2200mAh 5s

UPDATE: 7/30 - Gone through a few iterations of this build now. I'm able to run a solid 7min with the 2200mAh 5s on HQ 7x4x3 which I found to provide the best control without sacrificing much fly time. Cruse speed is a modest 40mph and punchouts can reach nearly 100. Bi-blades weren't all that successfull and ended up feeling a bit too floaty and loose. I made a 4s Li-Ion pack out of 20700 cells and got 10 min of fly time, but I'm almost certain these 30A cells aren't enough as the pack is fairly hot coming down. Will likely try a 4s2p 18650 pack soon.

The untimely demise of my session and subsiquent move to an 8 Black necessitated trimming as much weight as I could out of the build. This included removing the arm and front guards, changing to a gopro stock mount, and gram-saving here and there. 668g/963g AUW with 2200mAh 5S


Part List


RDQ Source One V3 7" Long Range Frame - 6mm V0.2 Arms (9 builds)

Flight Controller



CLRacing 45A 32Bit 45A 30x30 4in1 ESC (2 builds)


4 x BrotherHobby Avenger V2 2507 1850Kv 3-6S Long Range MotorDefault Title (8 builds)


HQProp DP 7X4X3 Propeller (Set of 4 - Light Grey) (31 builds)

FPV Camera

RunCam Sparrow

FPV Transmitter

RDQ Mach 3 Video Transmitter 25-1000mW VTX 2-6S - U.FL or MMCX (124 builds)


TrueRC Singularity Long 5.8GHz SMA Antenna - RHCP or LHCP (6 builds)


FrSky R9MM OTA SBUS Long Range 900MHz Micro Receiver (ACCESS) (51 builds)


2 x RDQ Series 18.5V 5S 2200mAh 80C Long Range LiPo Battery - XT60 (24 builds)


FrSky R9M Transmitter Module (67 builds)


FrSky X-Lite 2.4GHz RC Transmitter w/ R9M Lite Combo - Black or Red (73 builds)


RadioMaster TX16S Multi-Protocol RF Module OpenTX 2.4GHz RC Transmitter w/ Hall Gimbals (10 builds)


Fat Shark Dominator V3 FPV Goggles (57 builds)

3D Printed

TBS Source One Accessory Kit (8 builds)

3D Printed

RDQ Mach 2 / Mach 3 Combo 30x30 Stack Mount - 3D Printed TPU - Choose Your Color (20 builds)

HD Camera

GoPro HERO8 Black
See Site


M3 Knurled Standoff w/ Small Step (1PC) - Choose Your Color & Size (3 builds)

Misc Parts

Vifly Finder 2 Buzzer - Lost Drone Finder/Locater/Alarm (86 builds)

Misc Parts

3 x 3-6s Tiny LEDs (14 builds)

Video Receiver

Furious True-D Diversity Receiver Module 5.8GHz System V3 Firmware 3.9 (24 builds)

Radio Module

FrSky R9M Module (67 builds)

Battery Charger

Hitech RCD 44245 RDX1 AC/DC Battery Charger/Discharger

Soldering Iron

UY CHAN Upgraded Original TS100 Digital OLED Programmable Pocket-size Smart Mini Outdoor Portable Soldering Iron Station Kit Emb (179 builds)


FrSKY 900MHz Super 8 Antenna for R9M and R9M Lite Module - FCC Version
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Keker FPV   Aug 03, 2020  

Good build ! What is the gopro mount for the first picture ? Is it TBS ND Filter ?

fly.615   Aug 03, 2020 

Thank you! It's from Brain3D, has an integrated holder for the TBS filters

blade1496   May 22, 2020  

Nice build! How's the performance on 5s with the 2507 1850kv motors?

fly.615   May 23, 2020 

Thanks! It does pretty well considering how heavy it is. I settled on 7x3.5x3 which provided a good balance of handling and efficiency. I would probably have dropped to the 1700kV if I were to do anything different. Also this frame is quite heavy on its own.

simogere   Mar 08, 2020  

Good shot! I'm planning to do the same but with dead cat arms. Have you got any dvr to show?
On my 6'', using a 6s li-ion pack, I obtain 15-20 min flight time of cruising (without the session 5)

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