Open Source FR7 - 7" Long Range Cruiser

By Jeffmhopkins on May 04, 2019

42  10,483  17

Using the new FR 7" Open Source Frame (link below)

Flying 4400 5S (dual 2200s) on 2408.5 2222kv this quad is meant for fast long range and killing some amps... She's a beast.

Betaflight 3.5.7, diff here:


Part List


FR7 v4.x Frame Cut Files by stynkebutt (7 builds)
See Site

Flight Controller

RDQ Bardwell F4 3-6S 30x30 Flight Controller V2 - JBF4 AIO FC w/OSD (159 builds)


4 x HGLRC Forward FD50A 2-6S 32Bit DShot1200 50A ESC


4 x HYPERLITE 2408.5 TEAM EDITION (CHOOSE KV) (20 builds)


HQProp DP 7X4X3 Propeller (Set of 4 - Light Grey) (55 builds)
See Site

FPV Camera

Foxeer Predator Standard/Mini V3 16:9/4:3 PAL/NTSC switchable 1000TVL Super WDR OSD 1.8mm Lens - Red, Black, Blue, and Purple (24 builds)

FPV Transmitter

RDQ Mach 3 Video Transmitter 25-1000mW 5.8GHz VTX - U.FL or MMCX (146 builds)




FrSky R9 Slim+ OTA 900MHz Mini Receiver - ACCESS (34 builds)


RDQ Series 18.5V 5S 2200mAh 80C Long Range LiPo Battery - XT60 (27 builds)


FrSky 2.4G ACCST Taranis Q X7 16 Channels Transmitter Remote Controller Black for RC Drone (263 builds)


FXT VIPER V2 5.8GHz Diversity FPV Goggles w/ DVR (13 builds)

HD Camera

GoPro HERO5 Session (302 builds)

HD Camera

Runcam 5 - 4K Action Camera - Choose Color (21 builds)

Misc Parts

Buzzers & Alarms (9 builds)

Misc Parts

RDQ Micro M8N GLONASS GPS Module (72 builds)

Misc Parts

FR# Print Files by stynkebutt (6 builds)
See Site

Misc Parts

511D108M035EK4DE3 Vishay / Sprague | Mouser
See Site

Radio Module

FrSky R9M Transmitter Module (69 builds)

Battery Charger

ISDT Q6 Plus 300W 14A MINI Pocket Battery Balance Charger (62 builds)

Soldering Iron

Weller WESD51 Digital Soldering Station (3 builds)


RDQ 9 Piece Drone Racing Tool Kit (8 builds)


TrueRC X2-Air 5.8GHz SMA Receiver Antenna - Choose Your Polarization


MenaceRC 5.8GHz SMA VTX & Receiver Antenna Pack - RHCP (3 builds)


TrueRC True-MoX 915 915MHz RC Antenna for R9 - RP-SMA (2 builds)
Show stores (8)


Sign in to comment

Roll Pitch Y'all   Feb 04, 2020  

whats the 915 mhz antenna in the back of the quad? the stock r9slim plus it the standard T shape, can you link to that antenna?

iJaaay   Jul 18, 2019  

What made you decide to run dual 5S instead of single/dual 6S? Or even just a high mah single 5S?

Jeffmhopkins   Jul 19, 2019 

i already had them :)

i wouldn't mind running a 4-5Ah 5S single battery, but theyre not the cheapest

BadMonkeyFpv   Jul 03, 2019  

hi, it's awesome. have you got the weight please without the lipo?

Jeffmhopkins   Jul 05, 2019 

730-740 all up with session no battery

WILLBEER   Jun 09, 2019  

Poor guy, splashed down to Davey Jones locker. Rust in Peace :'(

Jeffmhopkins   Jun 09, 2019 

It was sad. Still have two more FR7s to build up ;)

HK-AERIAL VTOL   May 30, 2019  

Hey allright! Another 2408.5 7" LR club member! I love the sound of the bearings on arm. They have that "premium skateboard bearing" sound that makes me feel warm inside. I've been getting nearly 10 minutes of flight on the 1622 KVs (on a big 6S) with plenty of power left over! That's more "beach cruiser" than it is "freestyle motocross".

Jeffmhopkins   May 30, 2019 

Yeah man, 2222kv on 5S feels great for line cruising and mountain surfing!

HK-AERIAL VTOL   May 31, 2019 

Killer! I'll see the hawks and buzzards gliding around when I get home and that will make me want to get up there and just float around with them (unfortunately they wisely keep their distance so I can't really fly "with them"). I'm glad LR seems to be gaining as much steam as X-Class. That is my next leap to take (gotta save up a little money and do some research). Thanks for sharing Jeff!

Alpha   May 26, 2019  

flight time ?

Jeffmhopkins   May 26, 2019 

So this build was purpose built for fast cruising, not efficiency. Taking that into account with dual 2200 5S at 55-60 average cruise you're looking at probably 8-9 minutes without being super hard on batteries. If you wanna go hella slow (35-40mph) I'm sure this build would reach 12+ minutes, and change the props out to the crappy 7x3.5 probably 15 minutes..... But that's not my type of flying.

But when I fly I think more about how far while maintaining speed. So in that regard this rig is capable of 3 miles out and back at a decent cruise, or 4 miles out and back with one leg fast. I've done two 1.5 mile out and backs on the same battery with mAH to spare on the same flight.

weieva   May 27, 2019 

I use Tattu all the time, and many of my friends use this brand of battery.Of course, because it has many advantages, such as high security, high energy density, high cycle life, high and low temperature performance.We all play with this.You can also customize battery, shape and capacity.Hope it helps!
More information is available here

OakFpv   May 20, 2019  

Is there room for a 4 in 1?

Jeffmhopkins   May 20, 2019 

Sure is. My buddy is running one.

Notagolf   May 05, 2019  

where did you have cut the frame

Jeffmhopkins   May 05, 2019 

It was cut at CNC madness

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