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Supersonic slinging. (Read 117 times)

Teg

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Supersonic slinging.
Dec 8^th, 2021 at 1:29pm

Well, not yet.
But someone did most of the work to calculate the optimal armlengths, sling lengths and projectile weight.
https://www.youtube.com/watch?v=gdXOS-B0Bus
And
https://github.com/Ennsye/CDT
https://www.overleaf.com/project/5ebae7675668230001078961
for the excellent manual.

I haven't found the time to look into it in detail, but it might be worth a quick read over christmas.
I have the impression, that the boundary conditions of the solver can be quite readily adjusted to a slinger. Arm extension is not covered, but as most of the energy does not come from there, I think it can be neglected for an initial estimate.
It might be possible to just supply initial conditions to never be in the platform phase and start directly with free dynamics.
Who's willing to try it?

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Sarosh

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Re: Supersonic slinging.
Reply #1 - Dec 8^th, 2021 at 3:15pm

Cool! bang
I only understood that it sounds like a weapon. Cool

I have python installed and have followed a couple of tutorials but nothing stuck I didn't learn much.
What do we do with the github link is it a copy paste thing? (yes I don't know anything)
the overleaf link here doesnt work I used the one in the video description
I'll read the pdf maybe I'll understand something there.

Teg wrote on Dec 8^th, 2021 at 1:29pm:

Who's willing to try it?

try to optimize for a slinger?
if we are optimising for a slinger what optimization are we talking about, sling length and projectile mass, compound sling, slinging style, modified staff sling?

P.S.: if it's a man powered device it would probably look like a whip which isn't as epic

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Teg

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Re: Supersonic slinging.
Reply #2 - Dec 8^th, 2021 at 4:45pm

Sarosh wrote on Dec 8^th, 2021 at 3:15pm:

What do we do with the github link is it a copy paste thing? (yes I don't know anything)

Press the green button, then download the zip. Unzip into some folder, (and scan with your antivirus Wink

)
Follow the instructions in the Readme. However, this threw an error for me, but I'm a bit too tired to troubleshoot that now.

Sarosh wrote on Dec 8^th, 2021 at 3:15pm:

try to optimize for a slinger?

Yes, exactly. I meant more body torque available (or measured), your sling length, and then compare your results with the simulation. Then vary sling length and see if the simulation matches up. Something along these lines.

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NooneOfConsequence

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Re: Supersonic slinging.
Reply #3 - Dec 8^th, 2021 at 10:24pm

Great find Teg! Supersonic slinging is on my bucket list.

“My final hour is at hand. We face an enemy more numerous and cunning than the world has yet seen. Remember your training, and do not fear the hordes of Judas. I, without sin, shall cast the first stone. That will be your sign to attack! But you shall not fight this unholy enemy with stones. No! RAZOR GLANDES! Aim for the eyes! May the Lord have mercy, for we shall show none!“ -Jesus the Noodler

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Kick past-moderator Offline Posts: 4451 Finland	Re: Supersonic slinging. Reply #4 - Dec 9^th, 2021 at 8:18am I can imagine the defenders of a castle looking a bit amused at the enemy lining up some rubbish looking little ballistas... and then needing a new change of trousers after cracks echo around the valley
Back to top	You are a great guy Kick but also slightly scary at times. - Morphy "Nothing matters, but it’s perhaps more comfortable to keep calm and not interfere with other people." - H.P. Lovecraft, in a letter to Frank Belknap Long, 7 October, 1923 IP Logged

Curious Aardvark past-administrator Offline Taller than the average Dwarf Posts: 13965 Midlands England Gender:	Re: Supersonic slinging. Reply #5 - Dec 22^nd, 2021 at 7:08am what is with github ? did they deliberately go out of their way to make it as hard to use as possible. So many of the 3d printer firmwares are on github, and finding a specific file is just a complete nightmare. I'm pretty sure I have python installed, I will gird my loins and go look at this one
Back to top	Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One - works for me IP Logged

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