4" ultralight walksnail toothpick

By Alurpal on Jul 10, 2023

10 0 3

Wanted to build an efficient, quiet, sub250 freestyle quadcopter that uses walksnail. I went with 4" biblades on 1404 3800kv motors, toothpick frame, aio 20a 32bit esc/fc, elrs, and avatar 1s. I'm getting 6-8 min with a 4s 450mah battery. Betaflight 4.4 was an easy tune with just increasing P:D via osd menu and then increasing feadforward till it felt good.

I cap the motor output to 80%. Hover was around 14% which left the low end a little too sensitive for my likinf so i fly with 25% expo and center it around hover. this dramatically helps with throttle control around the hover point.

Here is onboard footage with some lens correction applied. Started to rain so I cut it early, prob had 50% battery remaining.

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Photos

Part List

Frame	PickleBig(4", 5", 6", 7") Cncdrones.com	$14.00
Flight Controller	Toothpick F405 2-4S AIO Brushless Flight Controller 20A (BLHELI_32) V4 (18 builds) Betafpv.com	$67.99
Motors	4 x T-Motor F1404 3800Kv Micro Motor (6 builds) Racedayquads.com	$67.56
Propellers	Gemfan 4024-2 4" Hurricane Durable T1.5mm Prop - (4CW+4CCW) (6 builds) Rotorvillage.ca	$5.49
FPV Transmitter	Walksnail Avatar HD Mini 1S V3 VTX Kit VTX w/ Nano Camera (13 builds) Racedayquads.com	$108.99
Receiver	Foxeer ELRS 2.4GHz Receiver - T Antenna Racedayquads.com	$15.89
Batteries	Gaoneng GNB 14.8V 4S 450mAh 80C LiPo Micro Battery (Long Type) - XT30 Racedayquads.com	$11.99

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Discussion

Madcatmike3d Sep 10, 2023

It's not being powered off of a 5v source, so I assume it isn't running the Avatar 1s vtx?

Alurpal Sep 11, 2023

it is the 1s vtx. im powering it from 5v rail on my fc. no issues so far. (note: ive had issues powering it from 5v on a 1s quad when voltage got below 3.1, but that doesnt seem to be a concern on 3-4s)

nathangw Jul 22, 2023

nice build

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