4" Space Flea

By jwangdk on Nov 20, 2017

21  1,519  15

My precious 4" light weight budget build. 235g AUW /w 800mah 3S batteries and 245g AUW with 650mah 4s.

Really happy with the frame. Light and tight but still 4mm bottom plate. Super cheap too!
The stack holds up well and the motors too. Cheap and fairly durable.

Built for both bottom and top mounted battery. I fly with bottom mount atm.


Part List


Space Flea 4 (4mm version)

Flight Controller

20x20mm HGLRC XJB F438 Flytower Micro F4 Flight Controller AIO OSD BEC & 33A BLheli_S DShot600 ESC (5 builds)


2 x Racerstar Racing Edition 1407 BR1407 3500KV 2-3S Brushless Motor Red for 150 180 200 RC Drone FPV Racing


4 X Racerstar Racing Edition 1407 BR1407 3500KV 2-3S Brushless Motor for 150 180 200 RC Multirotor (18 builds)


10 Pairs Kingkong 4045 4x4.5 Inch PC Fiber Glass Propellers CW CCW for Multicopter (7 builds)

FPV Camera

Caddx Turbo Micro F1 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera 4.5g (77 builds)

FPV Transmitter

Eachine VTX03 Super Mini 5.8G 72CH 0/25mW/50mw/200mW Switchable FPV Transmitter (417 builds)


Frsky XM+ Micro D16 SBUS Full Range Mini Receiver Up to 16CH for RC FPV Racing Drone


2 x Turnigy Graphene 650mAh 4S 65C Lipo Pack w/XT30 (2 builds)


4 x Turnigy Graphene 800mAh 3S 45C Lipo Pack w/XT60


FrSky ACCST Taranis Q X7 Transmitter 2.4G 16CH Mode 2 White Black International Version for RC Drone (263 builds)


Skyzone SKY02S V+ 3D 5.8G 48CH FPV Goggles With Head Tracking HD Port DVR Playback for RC Drone (22 builds)

HD Camera

GoPro Session (62 builds)
Show stores (4)


Sign in to comment

RadRacer   May 11, 2018  

How are these motors holding up? I'm looking for some 1407s for my 3" build

jwangdk   May 12, 2018 

I really like them! And although crashing a lot from flying agressively, I haven't changed many.
I highly recommend them and consider them to have an insanely good price/value ratio. You don't get the true power you might get from other more expensive motors though.

GZ   Jan 26, 2018  

Wanting to build this, but i'm not a great solderer and 20*20 seems too small for me. does this frame support standard 30.5mm fc's?

jwangdk   Jan 27, 2018 

No. It's a 20x20 frame only.

jwangdk   Jan 27, 2018 

Check out my 3" build. Much better for starters and flies great too.

GZ   Jan 27, 2018 

thank you!

KeirDavis1   Dec 12, 2017  

I'm looking to get into drone building and yours seems like a great one to start with! :D

Is there any extra parts I need to order than the parts listed?

Thanks :D

jwangdk   Dec 16, 2017 

It's definitely a good build, but the 20x20mm layout of the stack is pretty tight for at first time build imo.

Check out my budget 3" build - that might be a better start for you...

You need standoffs (25mm) and a batterystrap apart from the listed parts.

KeirDavis1   Dec 18, 2017 

Thanks dude!

fretman   Dec 05, 2017  

Love the build! Do you have the weight of the frame only?

jwangdk   Dec 11, 2017 

38 grams. I added af photo for documentation.

fretman   Dec 12, 2017 

thanks, how much camera tilt can you get on this? the front standoffs look very close, gap too narrow for micro cam to fit through?

jwangdk   Dec 16, 2017 

Can do 0-40 degress tilt. It's tight but works. The camera mounts are on Thigiverse - specific for the frame.
Can't see the frame in the camera view at all... The cut out is not too narrow.

buildflycrash   Nov 20, 2017  

I have a set of those motors. Looks like I now have some inspiration for them.

jwangdk   Nov 20, 2017 

That's nice to hear. I really like this frame. There's a Spaceflea 3 and 2.5 too...

Guides & Reviews

Jun 21, 2021

AirbladeUAV has done it again and this time they've brought long range to the 5" class! Based on the popular Transformer Mini, the new Transformer 5" Ultralight adopts a lot of the same design philosophies with larger props and more payload capacity. It can fly upwards of 20 minutes on a 4 cell Li-Ion battery pack and in ideal conditions it's got a range of over 4 to 5 miles. In this guide I'll walk..

Read more
Mar 04, 2021

With the release of the DJI FPV Drone cinematic FPV has become a lot more accessible, but you certainly don't want to crash a $750 drone! The QAV-CINE Freybott is a compact, lightweight cinematic FPV drone that can take a hit and keep going. It's a lot safer to fly indoors and around people. With a naked GoPro or the SMO 4k you can capture some great stabilized footage. In this guide I'll show you..

Read more