[MMMerc]

Now i understand the masses of variables that could be attributed to such a test, but my inquiry is: have you guys considered testing the effectiveness of bouncing of different materials?

[Jaccen]

Are you talking about paintball brittleness?

They've done drop tests here:

http://www.punkworks...x.php?p=7&id=14



Or are you talking about testing material for use as protection/getting a bounce? Angled (if possible) foam would get my vote for cheap and easy to implement.

[MMMerc]

Jaccen, on 22 March 2012 - 10:26 AM, said:

Are you talking about paintball brittleness?

They've done drop tests here:

http://www.punkworks...x.php?p=7&id=14



Or are you talking about testing material for use as protection/getting a bounce? Angled (if possible) foam would get my vote for cheap and easy to implement.

Talking about protective material, and which materials would invoke the most bounces. Foam seems like it would be to hard of a material, and wouldnt necessarily deflect it as much as catch it.

[Troy]

I think they should drop paintballs on a steak... that'll give a nice fleshy target that will be reasonably consistent. If they wrap it in saran wrap or something like that, they can even eat their target after they are done.

[MMMerc]

Troy, on 22 March 2012 - 11:06 AM, said:

I think they should drop paintballs on a steak... that'll give a nice fleshy target that will be reasonably consistent. If they wrap it in saran wrap or something like that, they can even eat their target after they are done.

Oh yeah even better yet, pigs are often used as target practice due to their skin and flesh being a similar toughness.

[Jaccen]

MMMerc, on 22 March 2012 - 10:35 AM, said:

Jaccen, on 22 March 2012 - 10:26 AM, said:

Are you talking about paintball brittleness?

They've done drop tests here:

http://www.punkworks...x.php?p=7&id=14



Or are you talking about testing material for use as protection/getting a bounce? Angled (if possible) foam would get my vote for cheap and easy to implement.

Talking about protective material, and which materials would invoke the most bounces. Foam seems like it would be to hard of a material, and wouldnt necessarily deflect it as much as catch it.

Foam can be a variety of compositions:
-open cell
-closed cell

A variety of firmness:
-camping mat
-sponge
-packing material
-beer head

Foam could bounce.

The bigger issue is finding a material that will conform to the human body and bounce.

[MMMerc]

Jaccen, on 22 March 2012 - 08:55 PM, said:

MMMerc, on 22 March 2012 - 10:35 AM, said:

Jaccen, on 22 March 2012 - 10:26 AM, said:

Are you talking about paintball brittleness?

They've done drop tests here:

http://www.punkworks...x.php?p=7&id=14



Or are you talking about testing material for use as protection/getting a bounce? Angled (if possible) foam would get my vote for cheap and easy to implement.

Talking about protective material, and which materials would invoke the most bounces. Foam seems like it would be to hard of a material, and wouldnt necessarily deflect it as much as catch it.

Foam can be a variety of compositions:
-open cell
-closed cell

A variety of firmness:
-camping mat
-sponge
-packing material
-beer head

Foam could bounce.

The bigger issue is finding a material that will conform to the human body and bounce.

I was thinking a gelatin format, perhaps a small pad of it, where there would be a grid of harder points which would roll it into softer areas and increase a bounce chance.

[cockerpunk]

seems like a great one for someone else to take on. 8 foot drop test is really pretty easy.

[The_Economist]

Troy, on 22 March 2012 - 11:06 AM, said:

I think they should drop paintballs on a steak... that'll give a nice fleshy target that will be reasonably consistent. If they wrap it in saran wrap or something like that, they can even eat their target after they are done.

Mmm, scientific and tasty. My kind of test.

[MMMerc]

cockerpunk, on 23 March 2012 - 09:27 AM, said:

seems like a great one for someone else to take on. 8 foot drop test is really pretty easy.

Yeah i wish i could do it, don't have that sort of materials however. Do you think it'd be more realistic to put the padding over a flesh like material? Like ballistics gel? to see how the padding interacts with the flesh.

[The_Economist]

I don't know how to get my hands on ballistic gel, but would Jell-o be a good and cheap substitute? I'm really thinking about tackling this one.

[MMMerc]

The_Economist, on 23 March 2012 - 10:30 AM, said:

I don't know how to get my hands on ballistic gel, but would Jell-o be a good and cheap substitute? I'm really thinking about tackling this one.

Uh, i'm not sure about that, But i found you a helpful video on the youtube,



Doesn't seem to hard, its just the padding i might have a problem getting. Good luck to you!

[cockerpunk]

The_Economist, on 23 March 2012 - 10:30 AM, said:

I don't know how to get my hands on ballistic gel, but would Jell-o be a good and cheap substitute? I'm really thinking about tackling this one.

i would stick with a solid backing, that way nothing can change and you are really just testing each materials damping properties.

also, you may want to plan to drop from higher then 8 feet. maybe start at 8 feet with each, and until you get 50% or more breaks in a sample of 10 or 20, then move up a foot.

[MMMerc]

cockerpunk, on 23 March 2012 - 12:41 PM, said:

The_Economist, on 23 March 2012 - 10:30 AM, said:

I don't know how to get my hands on ballistic gel, but would Jell-o be a good and cheap substitute? I'm really thinking about tackling this one.

i would stick with a solid backing, that way nothing can change and you are really just testing each materials damping properties.

also, you may want to plan to drop from higher then 8 feet. maybe start at 8 feet with each, and until you get 50% or more breaks in a sample of 10 or 20, then move up a foot.

Now see i was wondering about that, would the paintball reach tournament level velocity at 8 feet? I do agree with a solid backing now that i think about it, you are testing the material, not the materials effect with flesh.

[cockerpunk]

MMMerc, on 23 March 2012 - 01:00 PM, said:

cockerpunk, on 23 March 2012 - 12:41 PM, said:

The_Economist, on 23 March 2012 - 10:30 AM, said:

I don't know how to get my hands on ballistic gel, but would Jell-o be a good and cheap substitute? I'm really thinking about tackling this one.

i would stick with a solid backing, that way nothing can change and you are really just testing each materials damping properties.

also, you may want to plan to drop from higher then 8 feet. maybe start at 8 feet with each, and until you get 50% or more breaks in a sample of 10 or 20, then move up a foot.

Now see i was wondering about that, would the paintball reach tournament level velocity at 8 feet? I do agree with a solid backing now that i think about it, you are testing the material, not the materials effect with flesh.

no, the ball wont be going tournament velocity.

[brycelarson]

MMMerc, on 23 March 2012 - 01:00 PM, said:

Now see i was wondering about that, would the paintball reach tournament level velocity at 8 feet? I do agree with a solid backing now that i think about it, you are testing the material, not the materials effect with flesh.

no, it won't be going that fast - in fact, a paintball won't hit 300 fps at any fall length.

You don't need to conduct this test at 300 fps to get useful info.

[Bauzer]

brycelarson, on 24 March 2012 - 07:23 AM, said:

MMMerc, on 23 March 2012 - 01:00 PM, said:

Now see i was wondering about that, would the paintball reach tournament level velocity at 8 feet? I do agree with a solid backing now that i think about it, you are testing the material, not the materials effect with flesh.

no, it won't be going that fast - in fact, a paintball won't hit 300 fps at any fall length.

You don't need to conduct this test at 300 fps to get useful info.

by any chance do you know what the terminal vilocity of a paintball and the distance to reach that vilocity?

This post has been edited by Bauzer: 24 March 2012 - 07:41 AM

[MMMerc]

Bauzer, on 24 March 2012 - 07:40 AM, said:

brycelarson, on 24 March 2012 - 07:23 AM, said:

MMMerc, on 23 March 2012 - 01:00 PM, said:

Now see i was wondering about that, would the paintball reach tournament level velocity at 8 feet? I do agree with a solid backing now that i think about it, you are testing the material, not the materials effect with flesh.

no, it won't be going that fast - in fact, a paintball won't hit 300 fps at any fall length.

You don't need to conduct this test at 300 fps to get useful info.

by any chance do you know what the terminal vilocity of a paintball and the distance to reach that vilocity?

I dont think it's possible to reach that high of a velocity by dropping it. also i can understand that as well bryce.

[evan15549]

If you live anywhere near superior Wisconsin, Duluth Minnesota I'll be your test subject