#Neuro DogCopter Build List

1 messages · Page 1 of 1 (latest)

sly musk
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So, going over the info from Vedal's Throne page, the Neuro DogBot is around ~1.79 kg (round 1.8 for error).

Based on some calculations, a Noctua NF-A14 iPPC-3000 can produce a little over 1 kg of static force.

At a base, a drone would use 4 of them (quadrotor design) -- and I kinda rounded the calculation and plugged all 4 rotors in at once -- so the net static force from all 4 should be ~4.3 kg ± 10 %.

It can safely be said, that if Vedal wanted to build the Neuro DogCopter, the cost of all parts (assuming none he has being repurposed) would be around $400 or less:

  • 4x NF-A14 iPPC-3000 (~$120)
  • RPi 4 Kit (~$180) {$300}
  • Some 18650 batteries from China (a set of like 10 of them with a charger on AliExpress can run like maybe ~$30-40) {~$340, if only 1 set}

For proof of concept, could probably control it over WiFi, since RPi already has a built-in WiFi chip.

The power delivery would need to be over a UPS, and RPi UPS (usually like 2-4 batteries, depending what's on sale) controllers are like $30 each (also AliExpress), but a custom small breadboard chaining should be fine, for the rotors themselves, if a transistor is used to trigger the power, or just a PWN controller.

Essentially, it's reasonable to assume Neuro DogCopter Drone could be custom built for like $400, depending on what he already has, what he wants to use to serialise the voltage (the fans run at 12V).

Extra could certainly be beneficial to the project, but I believe $300-400 is a fair baseline, if he has an extra Pi available. If he needs a new one, might be more like $400-500. I'm accounting for a fair bit of excess cost, based on how many batteries or extra micro-components he might need for the breadboard, so the $500 range should leave plenty of calculated room for error.

Screenshot_20240223-113920.png Screenshot_20240223-113930.png Screenshot_20240223-120626.png
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Basically, if using 4 fans, he should be able to lift the bot, so long as he keeps the max weight of the drone itself under 2.5 kg.

Keeping it under 2 kg is ideal, as it leaves room for error.

But an RPi with some batteries, the fans, and some struts sticking out should be under that weight.

Can always add more fans and batteries, though, as this is modular and custom.

sour estuary
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I still think the twitter post was satire and he doesnt actually plan on doing something like that neurOMEGALUL

grand folio
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we need a vedal and michael reeves crossover collab

viscid python
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You’re making it ?

sly musk
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Can't hurt to give info, if he does consider it

next cairn
sly musk
# viscid python You’re making it ?

I was looking at how to do it with parts like that, anyway, but seeing the Twitter posts made me go the extra mile and try to run some calculations.

I won't personally be doing something like that for a while. Too many other things to do.

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But if he's doing the robot stuff anyway and wants to try to reach liftoff with a drone, this might be a good choice

viscid python
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Mhm

sly musk
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Like I said, it's also modular, so he can add more rotors and batteries as desired

viscid python
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Seems reasonable

proud locust
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Mark Rober

wooden cliff
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Pardon me while I nERMd for a moment:
A lift fan on a drone would be operating in free air, so when calculating thrust you want to use the specification for airflow, rather than static pressure. Use the approximate fan area and air density to find the exit stream velocity and mass flow rate, then multiply to get thrust.

ρ = 1.293 kg/m³
A = πr² = 0.0154 m²

v = V'/A = 4.86 m/s
m' = ρ·V' = 0.0967 kg/s

T = v·m' = 0.47 N```
It seems the fan alone weighs about 2 N, so it wouldn't be able to get off the ground. Probably better to just use a purpose-built drone motor instead.