Quadracer God_mode 3"

By Sabre on May 16, 2019

2  111  0

After building the 3" Quadracer Nimbus and having a bunch of god_modes, we decided to rebuild one as a 3". The great part about the Nimbus and God_mode is that 3" arms are interchangebale and available as a direct substitute for the 5" arms. Like the bigger brother god_mode, we like the following features:

  • ability to neatly "double-strap" bottom-mount battery (although the 3" arms are thinner, and mean fitting 2 robust straps through is tough -may need to find lighter straps)
  • easy build - good fitment
  • neat axii holder
  • tpu based camera holder

So with the ability to reuse the main quad (even with 30x30mm stack) its a quick and easy swap. In this case we downsized the stack too.

For motors we have gone Xnova 1407 3500kv, recommended as a good kv range for 4S on a robust 3" build. The motors come with screws that fit the 4 hole frame perfectly.

For electronics, we could have used the 30x30 stack from our other quads. But to get with the micro theme, we downsized with the Mamba 20x20 stack, with 20amp escs (burst 25amp) and F4 flight controller. The FC has no amazing features, but has everything we needed. The stack takes M3 screws, so we have run some 30mm plastic M3s through the 20x20 (non structural) holes to hold the lot together (this replaces the long M2 screws and white plastic spaces that come with the Mamba, as they wouldnt have been long enough, and i think would not fit the m3 holes in the numbus bottom plate.)

We then installed a 20x20 plate from Phaser (drilled out to 30mm) to mount the HGLRC nano VTX and and XM+. The HGLRC nano VTX is super tiny and super cheap - haven't had one go bad yet. We have reverted back to UFL VTX's, as we have broken a bunch of MMCX ones - they just dont seem to fit or hold up as well (we always hold down the UFL to the board with heatshrink for security). So on this build we have fitted up an AXII to the HGLRC and heat shrinked it down.

Anothe feature for this quad is the XT30 capactor adaptor. Seems neat.

Have powered it all with some Tattu 75c 4s packs. We are finding flight times a bit short - struggling to complete a race on high pitch props. It seems ok on lower pitch props.

Props are an issue, as there is less variety available than in 5". We havesome new HQ ones. A high pitch one that smashes the battery, and a more reasonable low pitch on. Both are very durable - more durable than the Dalprops.

Photos

Part List

Frame

Micro God_Mode 1.3 (3")
Quadracer.co
$45.00

Flight Controller

Diatone Mamba F405 MK2 25A 20x20 2-4s Mini Power Tower (77 builds)
Phaserfpv.com.au
$44.73

ESCs

Diatone Mamba F25 25A 2-4S 4 in 1 BLHeli_S ESC-MAMBA F25 (2 builds)
Phaserfpv.com.au
$31.85

Motors

Xnova Motor 1407 Multi Rotor Racing Motors (8 builds)
Nextfpv.com.au
$18.28

Propellers

HQ Durable Prop 3X4X3V1S (8CW+8CCW) Poly Carbonate
Nextfpv.com.au
$10.14

FPV Camera

Foxeer Falkor Micro (White)
Quadracer.co
$58.90

FPV Transmitter

HGLRC GTX NANO 5.8G 48CH BFOSD 0mW/25mW/50mW Switchable NTSC/PAL FPV Mini Transmitter (20 builds)
Banggood.com
$11.81

Antenna

TrueRC AXII - Short
Quadracer.co
$19.95

Receiver

FrSky XM+
Quadracer.co
$20.00

Batteries

Tattu 850mAh 4s 75-150c Lipo Battery Pack (2 builds)
Nextfpv.com.au
$14.21

Radio

FrSky Taranis X-Lite S 2.4GHz 24CH Radio Transmitter Longer Telemetry Range for RC Drone FPV Racing Multi Rotor (2 builds)
Banggood.com
See Site

Hardware

Phaser FPV 20X20 FC Fibreglass Stack Plate
Phaserfpv.com.au
$0.88

Video Receiver

TBS Fusion Receiver Module For Goggles (4 builds)
Phaserfpv.com.au
$135.63

Radio Module

TBS CROSSFIRE DIAMOND ANTENNA
Nextfpv.com.au
$25.03

Radio Module

TBS CROSSFIRE MICRO TX
Nextfpv.com.au
$77.94

Battery Charger

ISDT BattGo BG-8S Smart Battery Checker Balancer Receiver Signal Tester Quick Charge Function (4 builds)
Banggood.com
See Site

Soldering Iron

MINI TS100 Digital OLED Programmable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (145 builds)
Banggood.com
$53.99

Backpack

Realacc X-lite Transmitter Edition FPV RC Drone Shoulder Bag Handbag for FrSky X-lite/ X-lite S/ X-lite Pro (3 builds)
Banggood.com
See Site
Show stores (4)

Discussion

Sign in to comment

Guides & Reviews

28 2,462  33
28 days ago

This guide will walk you through the process of building your first FPV quad. The goal with this design was to build a low-cost, lightweight quad, yet powerful enough to safely carry a GoPro in close proximity areas. I chose these parts to minimize the amount of soldering at no cost to the quality. A typical build requires around 30 solders while this only needs 25. It's not a huge difference, but..

Read more
26 6,962  24
Nov 30, 2019

In late 2019 DJI made inroads into the FPV scene with their remarkable low-latency digital system. It gave us a 720p video feed with latency on-par with the status quo, analog video. Traditionally we've used analog video systems for low-latency video, but the video quality is far from ideal. It's a trade-off we've been willing to accept for the control. Now we've got the best of both worlds and what..

Read more