QAV-R

By lblb on Mar 14, 2016

3  2,488  4

This is my fifth quadrocopter and fourth Lumenier frame (QAV400, QAV250, QAV210, QAV-R) and this got rebuilt from my previous QAV210 posting. As with all my builds I have a great focus on aesthetics and durability. Everything is soldered on or has solid connections. Loctite on the motor and frame screws. I usually tape a lot of things to protect them from dirt, for example the underside of all four arms gets taped to prevent dirt from getting to the motor c-clip (not shown in pictures). The tape used is Tesa black premium Gaffer's tape. I have no OSD because a battery alarm via telemetry (Futaba system external voltage sensoring) is enough for me.

Weight: 345 g (everything except LiPo and GoPro)
AUW with LiPo: 511 g (T:W=7.5)
AUW with LiPo and GoPro: 589 g (T:W=6.5)

Some more photos here: https://imgur.com/a/9H6I8

Special considerations:
– I applied a bit of super glue around the sides to strengthen the carbon fibers and sanded afterwards, the other CF parts are sanded only
– The LiPo is secured by a rubberized strap but I also glued a rubber sheet on the top plate to prevent slippage
– The RC reciever got decased and the pin headers removed to make is small enough for the space available.
– I've yet to find double sided tape that behaves better than 3M VHB. Good stuff.
– I went for fancy anodized aluminium screws holding the motors and frame plates. They save about 10g in total. THe Lumenier textured standoffs are even lighter than similar black anodized aluminium standoffs, that's because they are hollow throughout.
– The GoPro mount is custom made.
– Everything should be water resistant, with the biggest weak point being the ESCs, which I haven't coated yet. Everything else is pretty much waterproof due to epoxy coatings on PCBs and Liquid Tape over solder connections.
– I've added a small connecetor in between the camera and VTX, so that I can go into the camera's OSD menu on the field. This is convenient to change the exposure, for example.
– The buzzer's ground is connected to the Lux, the positive side is conected to the LiPo voltage. That way, the buzzer is much louder. This works because the Lux only switches the ground side and would pass through 5V to the buzzer + pad.
– The GoPro has red Gaffer's tape around it so that I can find it when it has been catapulted away from the quad.
– The FPV camera lens is a Stock Optics 2.5 mm f/2 lens, should be better quality than the lens that comes with the camera and I find 2.5 mm to be a good middle ground while 2.1 mm feels too wide for me. I added red epoxy on the sides to further strengthen it against crashes. I've once had a lens fall apart from a crash...
– My order of the new DAl 5x4x3 triblades is already on its way, right now the HQProps are the best choice but they always break on impact.

Photos

Part List

Frame

QAV-R FPV Racing Quadcopter (5") (24 builds)
Getfpv.com
$114.99

Flight Controller

Lumenier LUX Flight Controller (Discontinued) (19 builds)
Getfpv.com
$39.99

ESCs

4 x Rotorgeeks RG20 Plus ESC (13 builds)
Rotorgeeks.com
$79.76

Motors

4 x Lumenier RB2204-13 2500Kv SKITZO Special Edition Motor (10 builds)
Getfpv.com
$99.96

Propellers

Aluminum M5 flange locknuts (2 builds)
Rotorgeeks.com
$4.34

Propellers

2 x HQ Tri Blade 5x4
Rotorgeeks.com
$5.00

FPV Camera

Foxeer HS1177 XAT600M DC5V-22V 600tvl Sony Super HAD CCD FPV Camera (71 builds)
Surveilzone.com
$14.99

FPV Transmitter

Lumenier TX5GPro Mini 600mW 5.8GHz FPV Transmitter with Power Switch (4 builds)
Getfpv.com
$36.99

Receiver

Futaba R3008SB 2.4GHz T-FHSS 8/32-Channel S.Bus2 High-Voltage Telemetry Receiver (3 builds)
Amazon.com
$79.70

Batteries

SLS XTRON 1300mAh 4S1P 14,8V 40C/80C (7 builds)
Stefansliposhop.de
$23.00

Power Distribution

Pyro-Drone PDB With XT60 Soldered
Pirofliprc.com
$9.99

Power Distribution

Kondensator 1000 µF 25V low ESR 1 STCK. Die guten !! Panasonic FC Serie (8 builds)
Ebay.com
$1.39

HD Camera

GoPro Karma Grip for HERO5 Black
Getfpv.com
$299.99

HD Camera

LayerLens for GoPro 3 & 4
Getfpv.com
$24.99

HD Camera

GoPro HERO5 Session (197 builds)
Getfpv.com
$199.99

HD Camera

GoPro Session (60 builds)
Getfpv.com
$149.99

Misc Parts

3M Scotch 5952 VHB Tape [45 mil / heavy duty mounting]
Findtape.com
$48.41

Misc Parts

Loc8tor Spare Tags (4 builds)
Rotorgeeks.com
$45.00

Misc Parts

2 x Rotorgeeks battery strap (10 builds)
Rotorgeeks.com
$8.68

Misc Parts

Tesa 4671 Natural Rubber Acrylic Coated Gaffers Tape, 11 mil Thick, 55 yds Length x 2" Width, Matte Black
Amazon.com
$229.99

Misc Parts

5V Magnetic Buzzer for Naze (5 builds)
Dronematters.com
$2.80

Misc Parts

2 x Aluminum M3x10 screws (2 builds)
Rotorgeeks.com
$3.88

Misc Parts

2 x Aluminum M3x6 screws (3 builds)
Rotorgeeks.com
$2.68

Misc Parts

Loctite Adhesives
Loctiteproducts.com
See Site

Misc Parts

Plasti Dip International
Plastidip.com
See Site
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Discussion

Sign in to comment

aliimam   Mar 17, 2016  

awesome build. still cant figure out what the thing taped between futaba antennae and vtx antenna is...

Also, what'd you plastidip? I dont see any evidence of it.

lblb   Mar 18, 2016 

That thing is a Loc8tor Lite tag, used to find the quad if the beeper doesn't work anymore. The Liquid Tape was used to cover all the solder connections, the linked imgur album shows some more details of that.

Whiffles   Mar 16, 2016  

Very nice photos and it looks like quite a high end quad. How does it fly?

lblb   Mar 16, 2016 

I can't say yet, maiden will be tomorrow, but I have high hopes. Should be a top performer.

I have some more photos here: https://imgur.com/a/9H6I8

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