Armattan Tadpole 2.5" with Caddx Loris

By Keeph on Oct 27, 2020

18  1,008  2

This build started out as an extra f/c I was gonna toss in the bin for spare parts. One boring day I was surfing YouTube and came across a video by Tmac where he built a 2.5" tadpole. That little thing was fit in the palm of his hand and zipped around like a 5" bigboy. Insperation sparked and spawned my version of a Armattan Tadpole. What a great little quad.

I started the build by putting motors on and seeing how much wire and room I had. After a few mock up of the electronics I decided to put the XM+ receiver on the bottom under the f/c and stacked the loris dvr on top of f/c and used a whitenoiseFPV 20x20 board for the TBS nano transmitter and mounted it forward of stack on stand-offs. I drilled the holes for standoffs a little off center with worries that the solder joints might touch top carbon plate on frame. Luckly everything fit with a few mm between video trans. and frame. I did use some tape between boards for insurance.

One the mock up was done I broke it all back down and started the full build. first was the wire sleeves for motors. Next I mounted the XM+ receiver and video antenna. Afterwards I installed the f/c and got all wires soldered inplace and left long for installation of other electronics. Here I checked the top plate to make sure it still fit in place and after conferming I continued by installing the Caddx Loris, FPV system, and srewed it all together.

At this point I went into BetaFlight used the setting TMac showed in his video and went flying. A few changes of rates and PID's to fine tune for my flight style. With a custom 2s-500mah battery I'm getting 6-8min flight times and with a custom 2s-1000mah it gets 10-12mins.

By far my favorite drone to fly. The Caddx Loris is a really good dvr, FPV cam is a bit cloudy but with a ND16 and some tuning of cam setting the DVR looks nice.


Part List


Armattan Tadpole 2.5" FPV Frame (26 builds)

Flight Controller

Diatone Mamba Toothpick F411 AIO Flight Controller (5 builds)


iFlight XING-E 1104 8300KV FPV Micro Motor w/ Plug (4pcs) (2 builds)


Gemfan Flash 2540 Durable 3 Blade (Clear) - Set of 8 (3 builds)

FPV Camera

Caddx Loris 4k Recording and FPV Camera System

FPV Transmitter

TBS Unify Pro Nano 5G8 (3 builds)
See Site


Lumenier Micro AXII Shorty SMA 5.8GHz Antenna (RHCP) (6 builds)


FrSky XM+ SBUS Mini Receiver (1149 builds)
See Site


16CH 2.4GHz Jumper T16 Pro V2 New Hall Sensor Gimbals Built-in Multi-Protocol Module Radio Transmitter Compatible OpenTX for Air (3 builds)


Fat Shark Dominator HDO 2 FPV Goggles (71 builds)


M3 Nylon Hex Male-Female Spacer Standoffs Screw Nut Assortment Kit - Black (3 builds)


4 x M2 x 20mm Steel Bolt (1PC) (3 builds)

Misc Parts

12pcs Plastic Protection Antenna Tube with Caps for FPV Drone Receiver Antenna Frsky XM+ X4R X4RSB (2 builds)

Misc Parts

30ft PET Expandable Sleeving Flexo Wire Cable Sleeve (1/4", Silver&Black)

Misc Parts

Superbat 3" U.fl/IPEX Cable Mini PCI to SMA Female Low Loss Coaxial Cable for Wireless Routers Mini PCIe Cards Network Exte

Misc Parts

Unify Pro Nano Mounting Board (Nano-Nano) (20 x 20) (8 builds)

Video Receiver

Foxeer Wildfire 5.8GHz 72CH Goggle Receiver Module


Lumenier Double AXII 2 Long Range 5.8GHz Antenna (RHCP)


Lumenier AXII Patch Antenna 5.8GHz (RHCP)
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Jodie Froster   Oct 29, 2020  

Very impressive packaging/use of space!!!!!

Keeph   Oct 29, 2020 

thank you, It got a little aggravating and tight. Nothing worked right until I put the XM+ receiver under f/c. XM+ on the whitenoise board was hitting top plate of frame.

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