TKS GTR 2.5" 2-3S Walksnail silent ripper

By ssx556 on Jul 24, 2023

3  0  1

My take on a quiet, powerful, digital, and small 2.5" quad.

Uses the full 2-6S V2 Walksnail Avatar VTX as the 1S lite VTX is heavily limited in output power. In order to fit it into such a small frame and get the weight down, I removed all casings and the headspreader as recommended by Chriss Rosser, saves 11.6g (about 65% of the VTXs weight). Soldered directly to the battery leads.
Alt Tag
Alt Tag

Avatar Nano as camera which is capable of 720p/120fps or 1080p/60fps. ELRS RX with ceramic antenna, held in place by cables and double-sided tape as there is not enough space between the 2 PCBs. The VTX is hardmounted with nyloc nuts from the top, the FC is softmounted with M2 nuts and threadlocker from the bottom, there is about 1mm space between the upper and lower screw ends, both PBCs are sitting (or hanging in the VTX' case) on standoffs (2.2mm for FC, 3.2mm for VTX) that are custom 3D printed.
Quad runs 550-750mAh 2S or 380-550mAh 3S. If you do run 3S I would strongly recommend a 330-470µF cap.
Dry weight 77.85g, extremely powerful on 3S.

The original 3D-printable standoff + camera mount was way too short for the 2 PCB digital build and due to their bad design the entire quad would've been held together by tiny M2 screws screwed directly into plastic. So, I used 4 15mm M2 aluminium standoffs instead and designed my own camera mount that will slip over the front standoffs to not compromise the structural integrity of the quad. You can find them here: https://www.printables.com/de/model/535050-more-rigid-aluminium-standoff-camera-mount
I printed it from Polymax Polycarbonate.

The 13mm FPVCycle motors have 2mm shafts so props need to be drilled out. I designed my own quick-swap 3D-printable prop-drill jig here: https://www.printables.com/de/model/532689-2mm-quick-swap-prop-drill-jig

The frame feet, camera lens protector and the front bumper is 3D printed from blue eSUN TPU 95A, files can be found in the original TKS GTR printables page.

Photos

Part List

Frame

TKS GTR 2s - 4s
Cncdrones.com
$18.50

Flight Controller

Poly F405 2S-4S AIO - TUNERC (10 builds)
Tunerc.com
$63.50

Motors

4 x FPVCycle 13mm 5000kv, 6350kv Motor - 2mm prop shaft (42 builds)
Fpvcycle.com
$39.96

Propellers

HQProp T2.5X2X3V2S (2CW+2CCW)-Poly Carbonate (4 builds)
Hqprop.com
$1.89

FPV Camera

Walksnail Avatar Micro/Nano Camera
Caddxfpv.com
See Site

FPV Transmitter

Walksnail Avatar HD VTX V2 Only
Caddxfpv.com
See Site

Antenna

Lumenier Micro AXII 2 Antenna 5.8GHz - U.FL (2 builds)
Getfpv.com
See Site

Receiver

0.4g Flywoo 2.4G ExpressLRS ELRS EL24E / EL24P (6 builds)
Flywoo.net
$21.57
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Discussion

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yohfpv   25 days ago  

Great build. Got some flight footage?

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