4.5" Alien (M.I.A)

By spilly on Sep 05, 2017

3  688  0

Update: Quad lost to the mountains due to an unexplainable failsafe, possible crossfire antenna damaged.

Suffered a crash that lead to a full overhaul of my now retired 5" alien. First time building this frame I didn't know exactly what I wanted out of it. Decided that I will fly this quad exclusively for freestyle flying. Switching from betaflight to kiss setup and will be utilizing the new mr.steele/kiss pdb with osd for a clean and easy build. Using a 4" body because the 5" has so much wasted space inside the frame.

So far I'm very pleased with the flight characteristics of the 4.5 frame. Vary snappy and responsive yet predictable and easy to fly smooth. the 4" body is slightly lower and narrower than the 5" but leaves plenty of room to spare, and the fpv camera mount on the 4" body is superior to the 5" K-mount IMO.


Part List


ImpulseRC Alien 4.5 Frame (8 builds)

Flight Controller

KISS FC - 32bit Flight Controller V1.03 (180 builds)


KISS 24A ESC Race Edition - 32bit Brushless Motor Ctrl (122 builds)


4 x TBS Mr Steele 2345kv SILK (45 builds)


HQ 5x4.3x3 V1S (2CW+2CCW) PC **Choose Color** (375 builds)

FPV Camera

Rotor Riot Special Edition RunCam Swift (144 builds)

FPV Transmitter

TBS Unify Pro 5G8 V3 (SMA) (150 builds)


TBS Triumph 5.8GHz RHCP FPV Antenna Set (SMA) (539 builds)


FrSky R-XSR 2.4GHz 16CH ACCST Micro Receiver w/ S-Bus & CPPM (823 builds)

Power Distribution

Mr Steele Alien PDB + Microphone + KISS OSD (5 builds)
Show stores (5)


Sign in to comment

Guides & Reviews

28 2,433  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 6,951  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