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02-23-2022, 08:15 PM
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Senior Member
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Join Date: Oct 2019
Location: South of KC, Kansas
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Quote:
Originally Posted by donquixote99
Why are people still using that medieval design for caltrops? Since the dawn of the sheet metal age, all you have to do is stamp out squares and bend them 90° on the diagonal.
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Your "bend" is actually called a 'brake'. The tool that makes the brake is also called a brake.
I get the feeling you haven't stuck a 1" sheet metal square into a brake diagonally.
And then you'd have one half of a Caltrop that would require a jig to weld to the other half.
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02-23-2022, 09:12 PM
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Ready
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Join Date: Oct 2013
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Quote:
Originally Posted by BigElCat
Your "bend" is actually called a 'brake'. The tool that makes the brake is also called a brake.
I get the feeling you haven't stuck a 1" sheet metal square into a brake diagonally.
And then you'd have one half of a Caltrop that would require a jig to weld to the other half.
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I have very very limited experience with working with metal, but I did in fact fold a square paper diagonally according to my design. You can drop it, and any way it lands, you get a point pointing up. Perhaps my design can be improved for manufacturability or effectiveness. Your insights most welcome.
In any case, I know perfectly well why people make medieval-looking caltrops, it's because they're wicked.
Last edited by donquixote99; 02-23-2022 at 09:22 PM.
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02-24-2022, 04:36 AM
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Senior Member
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Join Date: Oct 2019
Location: South of KC, Kansas
Posts: 1,446
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Quote:
Originally Posted by donquixote99
I have very very limited experience with working with metal, but I did in fact fold a square paper diagonally according to my design. You can drop it, and any way it lands, you get a point pointing up. Perhaps my design can be improved for manufacturability or effectiveness. Your insights most welcome.
In any case, I know perfectly well why people make medieval-looking caltrops, it's because they're wicked.
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It's an intriguing concept, but I can't picture it mentally.
I'd need to see some kind of pictorial or video demonstration.
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02-24-2022, 09:00 AM
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Junior Member
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Join Date: Nov 2020
Posts: 29
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How it all started..
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02-24-2022, 02:46 PM
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Rational Anarchist
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Join Date: Jul 2014
Location: DFW
Posts: 7,315
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Quote:
Originally Posted by BigElCat
It's an intriguing concept, but I can't picture it mentally.
I'd need to see some kind of pictorial or video demonstration.
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I think an origami caltrop has potential. Sold as parts with instructions, manufacturing a shipping cost will be minimal. They can be built as a fun family bonding activity. Up-selling fancy looking paper should be highly profitable.
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"We have met the enemy and he is us."
Last edited by nailer; 02-24-2022 at 02:55 PM.
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02-24-2022, 07:11 PM
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Ready
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Join Date: Oct 2013
Posts: 19,175
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Quote:
Originally Posted by BigElCat
It's an intriguing concept, but I can't picture it mentally.
I'd need to see some kind of pictorial or video demonstration.
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Here you go.
(Note, for some reason, when I upload these they rotate. Turn them back 90 degrees clockwise)
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02-24-2022, 07:43 PM
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reflexionar
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Join Date: May 2009
Location: Central Oregon
Posts: 2,273
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Quote:
Originally Posted by BigElCat
Your "bend" is actually called a 'brake'. The tool that makes the brake is also called a brake.
I get the feeling you haven't stuck a 1" sheet metal square into a brake diagonally.
And then you'd have one half of a Caltrop that would require a jig to weld to the other half.
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I use a brake every day. I fail to see a problem forming a 1" square diagonally. I do much more difficult things on a daily basis. However. if the purpose is to puncture tires I would use a bigger square. The only way they will be very effective is if they have a flat side down. The sin of a 45 degree angle with a 1" side would give .707", which would be just over 5/8" max to puncture with 16ga metal. I would think you would want at least a 1" tall point which would require a 1.5" square, minimum.
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Last edited by mpholland; 02-24-2022 at 07:46 PM.
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02-24-2022, 08:02 PM
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Senior Member
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Join Date: Oct 2019
Location: South of KC, Kansas
Posts: 1,446
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Quote:
Originally Posted by mpholland
I use a brake every day. I fail to see a problem forming a 1" square diagonally. I do much more difficult things on a daily basis. However. if the purpose is to puncture tires I would use a bigger square. The only way they will be very effective is if they have a flat side down. The sin of a 45 degree angle with a 1" side would give .707", which would be just over 5/8" max to puncture with 16ga metal. I would think you would want at least a 1" tall point which would require a 1.5" square, minimum.
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Forget the 1".
Grab a piece of paper, fold it into a square. Fold the square diagonally at 90 degrees. The result is nothing like a caltrop.
You get one triangle at 90 degrees from another triangle. It's an unstable thing that will roll over if a tire runs over it. It could land with the single point facing any direction, but not straight up. If it lands with a point facing straight up, the tire will crush it flat.
(edit---I could not see any of the three posts above when I made this post).
Last edited by BigElCat; 02-24-2022 at 08:05 PM.
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02-23-2022, 08:54 PM
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Senior Member
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Join Date: Oct 2019
Location: South of KC, Kansas
Posts: 1,446
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Truck drivers in the USA aren't even required to get vaccinated.
Canada requires it to enter Canada, the US requires it from Canadian truckers to enter the USA.
And they're crying about fuel prices. They have the freedom to find another line of work.
Parade of boneheads.
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02-23-2022, 09:11 PM
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Senior Member
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Join Date: Oct 2019
Location: South of KC, Kansas
Posts: 1,446
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I heard one independent trucker whining that he and the other independents don't have a union to represent them.
No shit. They didn't want to pay Teamster dues. That's why their independent.
He's never going to be able to understand that.
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