Can magnets be used to send a metal ball through a pipe?

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SUMMARY

This discussion centers on the feasibility of using magnets to propel a metal ball through a pipe, specifically exploring the arrangement and types of magnets required. Participants identified Iron, Nickel, and Cobalt as suitable magnetic materials for the ball. The conversation also touched on the use of 30 x 15 x 5 mm neodymium magnets with a force of 10 kg, questioning their effectiveness in achieving the desired propulsion. The concept of a gauss cannon or coilgun was mentioned as a related mechanism for accelerating objects using magnetic forces.

PREREQUISITES
  • Understanding of magnetic materials, specifically Iron, Nickel, and Cobalt.
  • Familiarity with neodymium magnets and their specifications.
  • Knowledge of basic physics principles related to magnetism and propulsion.
  • Conceptual grasp of gauss cannons and coilguns as mechanisms for acceleration.
NEXT STEPS
  • Research the specifications and applications of neodymium magnets for propulsion systems.
  • Explore the principles of gauss cannons and coilguns for potential design insights.
  • Investigate the effects of magnet arrangement on propulsion efficiency.
  • Learn about safety regulations and best practices for building magnetic propulsion devices.
USEFUL FOR

Engineers, hobbyists, and students interested in magnetism, propulsion systems, and experimental physics will benefit from this discussion.

Alanay
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To elaborate more on my question: Is it possible to send metal balls through a pipe with magnets arranged a certain way which could hit a target with force. I've seen something similar done before but I think the ball was also a magnet, is that the only way possible?
 
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What type of metal is the ball? If it is a magnetic substance, then it would certainly be possible.
 
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Comeback City said:
What type of metal is the ball? If it is a magnetic substance, then it would certainly be possible.
Any that I can buy online or from a general hardware store. Can you give me an example with what kind or arrangement this can be done? I was hoping to place loads of magnets on 4 parallel sides inside a pipe. Would the magnets have to be 2 by 1 something and then place diagonally like I have seen in videos?
 
Alanay said:
Any that I can buy online or from a general hardware store.
"Metal" is way too vague. What element/compound/alloy are you speaking of that makes up the ball? Only certain elements on the periodic table are magnetic.
 
Comeback City said:
"Metal" is way too vague. What element/compound/alloy are you speaking of that makes up the ball? Only certain elements on the periodic table are magnetic.
Like I said it doesn't matter, just tell me which ones can be used. I found this image though, do you know if it is accurate?

antostoof1_polarity.png
 
Alanay said:
Any that I can buy online or from a general hardware store. Can you give me an example with what kind or arrangement this can be done? I was hoping to place loads of magnets on 4 parallel sides inside a pipe. Would the magnets have to be 2 by 1 something and then place diagonally like I have seen in videos?

Are you trying to ask how to build a weapon?
 
Alanay said:
Like I said it doesn't matter, just tell me which ones can be used.
Iron, Nickel, and Cobalt are all magnetic elements.
 
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anorlunda said:
Are you trying to ask how to build a weapon?
Basically yes, it's a personal project. I've applied for a weapons engineering job and wanted to be able to put a few things on my CV. I've wanted to do this for a while anyway.
Comeback City said:
Iron, Nickel, and Cobalt are all magnetic elements.
Thank you, do you know if 30 x 15 x 5 mm magnets with 10 kg force stacked in rows as shown in the image above will be too much force or not enough?

Here is what I'm thinking of buying.

To be stacked in rows to send down a ball:
https://www.amazon.com/d/Magnets/first4magnets-F30155BK-Thick-Epoxy-Coated-Neodymium-Black/B00FAPVEV4/ref=sr_1_2?ie=UTF8&qid=1490807779&sr=8-2&keywords=B008UABT6G|B00TACKBWG|B003FBLS8O|B008U9TN92|B003FBNR60|B008U9TPQ8|B00TACM59S|B00TACM278|B00TACLYTK|B00382J9UO|B00TACLSHI|B00TACLS8W|B00TACLM5Q|B008U9TJYQ|B008UABU42|B00TACLPN0|B007JTMQIO|B008U9S0T6|B008U9TZZE|B00HA8BI4M|B00TACLJ5Y|B00TACKBGC|B00EYBSCRE|B00FAPVEV4|B0057X3FNY|B00TACG4ZE|B00HADU334|B00HA8V85G|B00FBG6GEW|B00F9A0P6U|B003MWAJ1I|B0022TF9IU

The balls which I might send down until I find something better
https://www.amazon.com/dp/B01N4KFC5G/?tag=pfamazon01-20
 
Alanay said:
Basically yes, it's a personal project. I've applied for a weapons engineering job and wanted to be able to put a few things on my CV. I've wanted to do this for a while anyway.

Are you aware that this is a public forum, and that it can be discovered by search engine and read by anyone including children?
 
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  • #10
Alanay said:
Thank you, do you know if 30 x 15 x 5 mm with 10 kg force stacked in rows as shown in the image above will be too much force or not enough?
It depends on what you are trying to accomplish with this weapon (I hope this is something safe). How fast do you want to shoot the magnets?
 
  • #11
anorlunda said:
Are you aware that this is a public forum, and that it can be discovered by search engine and read by anyone including children?
Yes, it's not like making a magnetic rail gun is in any way illegal. At least not in my country.
 
  • #12
Comeback City said:
It depends on what you are trying to accomplish with this weapon (I hope this is something safe). How fast do you want to shoot the magnets?
For now just enough to shoot through a thin piece of plywood, maybe several mm thick. Then stronger later on.
 
  • #13
I've ordered the magnets, I'll post back here with any results I get and the arrangement I used.
 
  • #14
As far as I know, permanent magnets can't provide any acceleration in this kind of setup. The repulsive forces will equal the attractive forces as the magnet passes through the tube and you'll just get the same output velocity as the input.
 
  • #15
Drakkith said:
As far as I know, permanent magnets can't provide any acceleration in this kind of setup. The repulsive forces will equal the attractive forces as the magnet passes through the tube and you'll just get the same output velocity as the input.
I'm talking about something like this:
 
  • #16
Drakkith said:
As far as I know, permanent magnets can't provide any acceleration in this kind of setup. The repulsive forces will equal the attractive forces as the magnet passes through the tube and you'll just get the same output velocity as the input.
Don't particle accelerators work in a similar way though (except with electricity instead of magnetism)?
 
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  • #17
Comeback City said:
Don't particle accelerators work in a similar way though (except with electricity instead of magnetism)?
I believe so yes, that would be like a gauss cannon/coilgun I believe.
 
  • #18
Alanay said:
I'm talking about something like this:


I looked at the video, and what I think is happening is that the two guys put energy into the system when they bring the "shuttle" magnet towards the rail. Then it gets propelled through the rail, and the friction at the end makes it stop. Otherwise it would have started returning.
 
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