2.5" BR25 / Runcam Split Mini / 1106 / R-XSR

By fiveomustang on Jul 06, 2018

4 361 9

Based on https://rotorbuilds.com/build/11447 , I wanted to do a 2.5" prop build after completing my first 5". Everything went together well and it flies great on Betaflight 3.4! The RunCam Split Mini records way better video than I expected. Running all stock PIDs in Betaflight. I get about 4 minute flight times out of the 500mah batteries charged to normal voltages.

Here is the maiden flight video!

There is a pic of it next to my Martian II 5" for size comparison.

Update, upgraded to Betaflight 3.4 release version and added a spare gps for the heck of it. Return to home works great on the 2.5", ha ha!

Photos

Part List

Frame	BR25 2 and half inch frame kit (2 builds) Armattanproductions.com	$27.99
Flight Controller	HGLRC F4 Zeus F4 Flight Controller Integrated with OSD BEC PDB AIO 15A BLheli_S 4 In 1 ESC for RC Racing Drone (15 builds) Banggood.com	$49.20
Motors	4 x EMAX RS1106 6000KV MOTOR (1 PCS) - Heli-Nation Heli-nation.com	$51.96
Propellers	4 Pairs Gemfan Flash 2540 2.5x4 2.5 Inch 3-Blade Propeller with 1.5mm Mounting Hole (171 builds) Banggood.com	$4.11
FPV Camera	RunCam Split Mini FPV Camera / HD 1080P 60 FPS Recorder Heli-nation.com	$79.99
FPV Transmitter	Eachine VTX03 Super Mini 5.8G 72CH 0/25mW/50mw/200mW Switchable FPV Transmitter (417 builds) Banggood.com	$12.22
Antenna	Realacc UXII Stubby RHCP U.FL/IPEX IPX 5.8GHz 1.6dBi Mini FPV Antenna For TX RX Fatshark Goggles R (28 builds) Banggood.com	$7.09
Receiver	FrSky R-XSR Ultra SBUS/CPPM D16 16CH Mini Redundancy Receiver 1.5g for RC Multirotor FPV Racing Drone (937 builds) Banggood.com	$24.29
Batteries	6 x Turnigy Bolt 500mAh 3S 11.4V 65~130C High Voltage Lipoly Pack (LiHV) (5 builds) Hobbyking.com	$78.30
Radio	FrSky X-Lite 2.4GHz RC Transmitter w/ 18650 Battery Caps - Black or Red (64 builds) Racedayquads.com	$121.99
Radio	FrSky Taranis Q X7 2.4GHz 16CH Transmitter (White) (263 builds) Getfpv.com	$107.99
Goggles	Fat Shark Dominator HDO FPV Goggles (136 builds) Getfpv.com	$449.99
HD Camera	GoPro HERO8 Black - Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 1080p Live Streaming Stabilization (18 builds) Amazon.com	$298.99
Misc Parts	5Pcs Realacc 58mm Battery Tie Down Strap for RC Micro FPV Racing Quadcopter Multirotor (6 builds) Banggood.com	$1.99
Video Receiver	ImmersionRC rapidFIRE w/ Analog PLUS Goggle Receiver Module (178 builds) Racedayquads.com	$169.99
Radio Module	TBS Crossfire TX LITE (6 builds) Getfpv.com	$149.99
Radio Module	TBS Crossfire Micro TX V2 (43 builds) Getfpv.com	See Site
Soldering Iron	Aoyue 469 Variable Power 60 Watt Soldering Station with Removable Tip Design- ESD Safe (10 builds) Amazon.com	$24.00
Backpack	Lowepro LP36899PWW Slingshot Edge 250 AW - A Secure, Slim, Smart and Protective Sling for a Compact DSLR or DJI Mavic Pro/Mavic Amazon.com	$114.99

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Discussion

Ifly@sgfpv Dec 09, 2022

do u think this motor can handle 4s?

imreallythatguy Jul 11, 2018

2 quick questions. First is your video recorded with the Runcam or did you ziptie a gopro on or something? 2nd what is the pink and green box you have ziptied on in your very first photo? The one that looks like it has a button on top...

fiveomustang Jul 11, 2018

Video is from the RunCam, and the box on top is a UBLOX micro GPS module. This quad can return to home on failsafe instead of just drop (new feature in Betaflight 3.4).

ghostface Jul 10, 2018

Cool build! I am just about done with my rebuild using the new sides :D Only thing I did differently is using a tx20 as vtx which meant it was an ultra tight build height wise.

Out of curiosity, can you share your pids/config for bf 3.4 please since we are running practically identical builds :)

fiveomustang Jul 10, 2018

I'm no expert tuner so I'm using the stock 3.4 PIDs still but here are the values. Let me know if I missed anything.

ghostface Jul 11, 2018

Thank's a bunch - looking pretty smooth for stock tune :D

ghostface Jul 10, 2018

btw. you got the bumpers on upside down - if you put them on the other way they will act as soft mounts :)

fiveomustang Jul 10, 2018

lol! Thanks for the tip! That makes sense

ghostface Jul 11, 2018

Your welcome! Just watch out for the c-clip and that it doesn't bind with the edges of the hole when the motor turns.

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