OpenRacer DJI O3 30x30 Stack Build V4

By Stevensbox on Sep 06, 2023

5  0  3

This is my forth (obsessive) build inspired by Limon's OpenRacer 5inch frame (see Here my mods include a more centered GoPro mount, a lower positioned capacitor holder, a rear mounted antenna holder (hold's both ELRS & Crossfire), & a 3mm taller canopy (30 to 50 degree viewing angle) for full 30x30 stacks. You don't need the frame spacers in my previoius builds, just a 4.5 spacer on top of the 10mm standoffs. In this build I'm using Limon's 5.5 inch arms for more stability (flies better). Also made GoPro mount holder for a small but intense LED flashlight I found on Amazon. Thingieverse TPU stl files & build notes are below. Let me know what you think. God's speed

OpenRacer Parts:
OpenRacer 5.5 inch arms:

Flight vid:

Night FLight (not so good):

Canopy: OpenRacer 30-50 taller Center GoPro 2:
Rear Mounted Antenns Holder:
Flashlite GoPro Holder:
Inner CanopyStandoff Spacer: 4.5mm Height (prevents screw from canopy damage):

Stack: FC-SpeedyBee F7V3 ESC-SpeedyBee BL32 50A 4-in-1 ESC
LED's: SpeedyBee Programable 2812 Arm LEDs
Motors: iFlight XING2 2306 1755KV
VTX: DJI O3 Air Unit Firmware V01.02.0000
RX: RadioMaster RP1 ExpressLRS 2.4GHz Nano Receiver w/ 65mm UFL T-Antenna
RX Antenna TPU Mount: OpenRacer Rear ELRS Ant Mount
BTFL Ver: 4.4.2
Preset: PID1: Karate Race 6s 5"
Canopy: OpenRacer 30-50 taller Center GoPro 2
Frame Flat Head Cap Screws: Inner 30mm Outer 16mm Tappered Flat Heads
Canopy Standoff Mounts: 10mm
Inner CanopyStandoff Spacer: 4.5mm Height (prevents screw from canopy damage)
Canopy Hold Down Screws: M3x10
Motor to Frame Screws: M3x8 Button Head (comes with motor)
Motor thru Brace to Frame Screws: M3x12 Button Head


Part List


Open Racer
See Site

Flight Controller

SpeedyBee F405 V3 BLS 3-6S 30x30 Stack/Combo (F405 FC / 8Bit 50A 4in1 ESC)Default Title (20 builds)


4 x iFlight Xing2 2306 1755KV Motor (5 builds)
Show stores (3)


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DeyronUsa   Sep 06, 2023  

looks awesome how did the light work out? have a link?

Stevensbox   Sep 07, 2023 

Working on it. Will post on Reddit. My name there is Stevensbox. Should have something by Saturday or Sunday. Thanks

Stevensbox   Sep 09, 2023 

Just added the vids link to this posting. Check my post out on Reddit:

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