first 3" Miniquad

By AmpereX on Mar 11, 2019

5 12 3

This is my first build to start FPV.
My goal was to stay below 250grams .. this didnt work well as you see on the picture (even without cam and vtx) .
ESC and Motors are budget versions, but they work well for beginning.

update:
I exchanged the 4in1 ESC with Josh Bardwell's 4in1 32Bit ESC due to a stuttering motor. Now it runs more smooth.
I also tried other props (HQ3x4x3) for more smoothness.

DVR footage :

Photos

Part List

Frame	iFlight iX3 V2 145mm FPV Racing Frame (2 builds) Rcheli-store.de	$27.00
Flight Controller	Bardwell F4 V2 AIO Flight Controller (159 builds) N-factory.de	$39.99
ESCs	n-Factory.de N-factory.de	$22.90
Motors	4 X Racerstar Racing Edition 1407 BR1407 3500KV 2-3S Brushless Motor for 150 180 200 RC Multirotor (18 builds) Banggood.com	$36.22
Propellers	Gemfan Flash 3052 Tri-Blade 3" Prop 4 Pack - Choose Your Color (83 builds) Racedayquads.com	$2.99
Propellers	HQProp Durable 3X4X3 V1S Red N-factory.de	$2.99
FPV Camera	RunCam Micro Sparrow (10 builds) Shop.runcam.com	$29.99
FPV Transmitter	5,8GHz TBS Unify Pro HV - RACE (SMA) (5 builds) N-factory.de	$24.00
Antenna	FPV Drone Video Receiver Antennas for - Race Day Quads (198 builds) Racedayquads.com	$3.99
Receiver	FrSky R-XSR EU LBT (2 builds) Flyingmachines.de	$29.95
Batteries	Tattu 3s 850mAh 75C FPV Lipo Akku XT30 N-factory.de	$14.99
Radio	FrSky Taranis Q X7 2.4GHz 16CH Transmitter (Black) (263 builds) Pyrodrone.com	$104.99
Goggles	FXT VIPER V2 5.8GHz Diversity FPV Goggles w/ DVR (14 builds) Getfpv.com	See Site

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Discussion

JB69 Mar 13, 2019

If you like, leave out the topplate and standoffs and you save about 20 g. Battery strap can be fixed between fc and lower plate.
All other parts, except the vtx antenna is inside the virtual frame of arms and motors. Its unlikely that you have a damage in these parts. You have chosen a very solid frame with 4 mm. That should be enough for a 79 Joule of impact energy. If you want you can protect the fc from contact with a 30x30 plate.

AmpereX Apr 12, 2019

thanks JB, this could be a good idea to get the weight below 250g as this was my goal :)

JB69 Apr 12, 2019

You're welcome, but make sure that no wires can be ripped off when flying close to obstacles like trees or bushes.

bootbox Mar 23, 2019

Nice clean layout, super nice build!

JB69 Mar 13, 2019

I did not see it on yor photos first, but keep the 2 back standoffs or replace them with smaller ones with a screw and a washer on top to fix your antennas.
Placing the lipo below makes it more stable and your props are not that close to ground.