XL7 Mid/Long range Cinema bird

By buhatkj on Jun 08, 2019

2  263  3

This is my first mid/long range build, and it was been far from trouble free, and its not close to over yet....
I killed 2 airbot f4 pro's trying to solder to the terrible tiny pads on some spots, gave up, and got an f4 v5 instead.
I killed one of the 4 in 1 ESCs too, just clumsily knocked a surface mount diode or something right off while handling. Whatever solder they use is terribly brittle on some of these things. Just as well, cant see how theyd have held up in even the first crash, of which there will likely be many.
At some point, ill wanna get a crossfire module for my T16 and a matching nano RX for this thing, but meanwhile, i'll be happy just to get the darn thing in the air.

The plan is to use full-up iNav with this thing, and have position hold, waypoints, the whole shebang. It fits an 1800mah which isnt huge, but hopefully with the bigger props will give me reasonable flight time. The motors are 1700kv, and while ill probably usually fly it on 4s the idea is to be able to upgrade to 6s with no hardware changes. FC runs on regulated 5v off the ESC, and the VTX has its own 12V regulator right off the battery.

Compared to my last build this has been the opposite of cheap! Lets hope it flies nice.
It will carry my Hawkeye firefly 6s, which is the best cam I own, and will do 4k and has a gyro image stabilization. Hoping for nice footage, as I live way out in the country now, and there is tons of lovely greenery to fly over and through and around and probably into.

So as of 6/8/2019 its flyable! Al lot of annoying things went wrong during this build, but after all the frustration it was nice to see it in the air. Manual angle and horizon modes fly fine, and its very steady in the air, but alt hold and pos hold didnt seem to want to engage, despite having plenty of satellites. I'll be checking out the blackbox logs hopefully they will provide some answer? blackbox is new to me, i have more experience with the pixhawk for real navigation stuff, iNav is new to me. When I get my nav modes sorted out and some decent footage to show I'll get that up here too :-)


Part List


iFlight XL7 V3 True X 7 inch 295mm Long Range FPV Freestyle Frame Kit Carbon Fiber FPV Frame (2 builds)

Flight Controller

OMNIBUS AIO F4 V5 Flight Control (22 builds)


iFlight iPeaka BLHeli_S 35A 6S 4-in-1 12V / 5V BEC DSHOT ESC FPV Racing Brushless ESC for RC Quadcopter Drone




EMAX Avan 6x3.8x2 Long Range Bi-Blade 6" Prop 4 Pack - Choose Your Color (11 builds)

FPV Camera

Caddx Turbo EOS2 4: 3 1200TVL 2.1mm 160 Degrés 1/3 CMOS Mini FPV Caméra NTSC / PAL Pour RC Drone (11 builds)

FPV Transmitter

Wolfwhoop Q3-S 5.8GHz 0.01/25/200/500/800mW 37CH Switchable FPV Video Transmitter with MMCX to SMA Female and Integrated FC Uart


iFlight 150mm Long Range Pagoda Antenna $6.99 KrazyKwads (2 builds)


iRangeX Fli14+ Mini Flysky Receiver w/ RSSI OSD Double Antenna 500m Distance for FS-i6 FS-i6S (7 builds)


HRB 1800mAh 6S 22.2V 50C LiPo Battery with XT60 Plug for SAB380 Align 470 ALZRC Devil 380 480 RC Helicopter Airplane Cars Truck


2 x FCONEGY 1800mAh 80C 14.8V Lipo Battery Pack with XT60 Plug for FPV Racing/Quadcopter/Drone/RC Airplane/Helicopter

Power Distribution

iFlight 2-8S Micro BEC Step-Down Voltage Regulator Module 5V/12V Output for FPV Racing Drone Quadcopter (2pcs)


ARRIS Jumper T16 Open Source Multi-Protocol RC Radio Transmitter with JP4-in-1 Module (Mode 2) NO Battery


Eachine EV100 720*540 5.8G 72CH FPV Goggles With Dual Antennas Fan 7.4V 1000mAh Battery For RC Drone (24 builds)

Misc Parts

RDQ BN-880 Flight Control GPS Module w/ Compass (12 builds)

Misc Parts

New Vifly Finder 2 5V Super Loud Buzzer Tracker Over 100dB w/ Battery & LED Self-power for RC Drone (21 builds)

Video Receiver

fosa FPV Monitor 5.8GHz 40Channels 7Inch LCD Monitor/Display Screen Receiver Monitor for FPV Drone Quadcopter with Wireless Rece (2 builds)


Hakko FX888D-23BY Digital Soldering Station FX-888D FX-888 (blue & yellow) (29 builds)


FPV Racing Drone Quadcopter Backpack Carry Bag Outdoor Portable Case for Multirotor RC Plane Fixed Wing (2 builds)
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buhatkj   16 days ago  

after a long break from flying, ive gotten back to it a little. I got this fellow out and the position and altitude hold work alright, with a bit of stuttering when they get close to the ground, im guessing thats propwash from ground effect or some such. RTH however, causes the thing to just go bonkers. Flew over my house and landed in the other yard, ejected the battery 30 feet, but fortunately no damage other that a few nicks on the props. I've added a lost model buzzer to it, and a filter cap, and i hope to get it out again soon.

Jodie Froster   Jun 09, 2019  

Where did you buy that "human intestine lining" 3-D printer filament?

buhatkj   Jun 10, 2019 

lol well the color was meant to be "red". It's a cheap TPU filament I got off Amazon. https://www.amazon.com/gp/product/B07P1TDLC6/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
I bought this kind because it has a comparitively high shore hardness, which lets it feed more reliably in bowden extruder printers like the ones i have. The parts of course come out less squishy than with other TPU filaments, but still quite durable and flexible enough for my purposes.

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