Q:

Need Ball Bouncers for Breech experiment

Need Ball Bouncers for Breech experiment

If anyone has or could make any of these balls and bounce them, that would be great. I am trying to determine the elastic factor of these 5 materials:
Steel, Brass, Aluminum, Delrin, Marble (glass)

The experiment needs a solid surface of smooth steel that is very solid (or possibly a smooth concrete floor).

1. Hold a yard stick straight up and hold the ball bottom at the top of the yardstick.
2. Drop the ball and measure the inches where the bottom of the ball bounces back up to.
3. Repeat a couple times for a repeatable reading.

Provide me with the ball diameter and weight in grains.

I’ll compile the numbers for an elastic factor for my simulation.

Thanks

PS: You don’t have to have all the balls, any will do, as others may have more balls.

Mods/Machinists

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quote synopsys:

Ah, it’s an individual analysis not a comparative analysis.

I had a feeling your program would reverse engineer the properties if you had the data. 😉

Any chance you might find some balls to take this on ?

…and their toilet named hoot…

quote moneyshot:

quote eddieirvine:

Hoot you are just to kind 😯 😯 only problem I can see with this test is, IT”S GOING TO HURT!! but I do have one thing going for me! If I get a yard stick and stand by it and drop my balls they will hit the ground because that is where I have to lift them from they are allready on the floor! so I might not get any bouch 🙄 😳 just a sharp pain!

so do your balls float when youre shittin, that could get messy, especially if they sink… 😯

There are some forum members who might consider that to be a personal question between gay co-habitants!

H 😯 😯 T

quote eddieirvine:

Hoot you are just to kind 😯 😯 only problem I can see with this test is, IT”S GOING TO HURT!! but I do have one thing going for me! If I get a yard stick and stand by it and drop my balls they will hit the ground because that is where I have to lift them from they are allready on the floor! so I might not get any bouch 🙄 😳 just a sharp pain!

so do your balls float when youre shittin, that could get messy, especially if they sink… 😯

Hoot you are just to kind 😯 😯 only problem I can see with this test is, IT”S GOING TO HURT!! but I do have one thing going for me! If I get a yard stick and stand by it and drop my balls they will hit the ground because that is where I have to lift them from they are allready on the floor! so I might not get any bouch 🙄 😳 just a sharp pain!

Ah, it’s an individual analysis not a comparative analysis.

I had a feeling your program would reverse engineer the properties if you had the data. 😉

quote synopsys:

I understand the balls will fall at the same rates but if your going to compare one against the other it seems that they would all have to be the same size on the bounce. I don’t know though, just a hunch…

I have simulated the same material with different sizes and different weights with the same Elastic Coefficient and they all would bounce the same.

Hoot you big thinker you, you’ve been holding out on us all these years… 😉

I was planning one doing all the balls in a short period of time.

I understand the balls will fall at the same rates but if your going to compare one against the other it seems that they would all have to be the same size on the bounce. I don’t know though, just a hunch…

Thanks Hoot;

I know what you are speaking of, but don’t need that because I have a program that has an input variable and as long as I can duplicate the real world effects, I will have my elastic variable. (which unfortunately is Elastic Coefficient not Modulus of Elasticty, Hardness, Rebounce, Compressibility, Tensile, etc. etc.)

Bounce me the balls and I’ll be all set.

In fact I’m already to simulate …

The effect being researched is called “Dynamic Hardness”, defined also as “Rebound Hardness”.

This property measures the height of the “bounce” of a material dropped from a fixed height onto a material. This type of hardness is related to elasticity. The device used to take this measurement is known as a scleroscope. Two scales that measures rebound hardness are the Leeb rebound hardness test and Bennett hardness scale.

That being said, such information already exists in a number of forms, some of which may need interpretation.

Consider that “bounce” is actually a combination of “Flexural and Compressive strength at a given temperature F/C (recalling that molecular motion is primary in the determination of the above mentioned strengths. Example, at 50F, water won’t bounce, but at 32F, water will slow its molecular activity enough to form a solid, and bounce off a hard surface. This is true of all materials.

Flexural Modulus of Elasticity, of a specific material @ a given degree F/C, is the effect being researched here.

The properties of plastics are given at this web site: http://www.machinist-materials.com/comparison_table_for_plastics.htm and further charts are available for various materials, such as steel, alloys, organic molecular materials such as carbon nano-tubes, and the list is endless.

However, it is not measured in how high a given material will bounce, at a specific degree F/C, off a specific base material that has identical deformation under load properties.

In layman’s terms, multiple experimenters cannot obtain reliable results in this property test, given the differences in temperature, flexural, deformation, and surface tension variables of the bouncing surface, and specific properties of the material being bounced.

To be reliable, one person must determine exactly what materials he needs to obtain the data on, have a control surface that is identical for all materials “bounced”, conduct such tests in a static environment with no variables of humidity or temperature, , and base his/her results on multiple, averaged, data for each material “bounced”.

I hope this helps. I know it’s complicated, but this is not a simple test…IF you want consistent, repeatable, and reliable results. All variables must be eliminated, and identical results achieved by other experimenters, for the test to be scientifically valid.

It’s an interesting test to be watched, but cannot easily be farmed out. And, it’s already been done on all materials previously to determine their properties. The problem is…for most individuals, the data is measured in units that are not suitable for our use.

Kindest regards,

Uncle Hoot 😯

Big ball little ball all fall the same and rebound the same 🙂

Don’t have to be the same size? What fancy program to you have now!? 😆

quote synopsys:

Problem looks to be getting just one of each…

If you get no takers I can make some calls and try to get a few “samples”…

Thanks for offering to get a sample pack. 1/2″ would be fine, and they do not have to be all the same size (gravity doesn’t care).

I was hoping that some machinst here would have an End Rounding tool for their lathe and make some out of scrap material.

im resisting here…but maybe we could get some .251-.253 delrin balls as ammo for some hardcore ass welts…

Delrin balls: http://www.plasticballs.com/delrin.htm

Hoot, these could work well as replacements for your broken ones… The 1/2″ diameter should fit, albeit snugly. 😆

Aluminum, steel, brass and stainless steel and bronze balls:
http://www.wagnercompanies.com/spheres_and_hemispheres.aspx

Looks like 1″ diameter will be your lucky number…

Here are even more balls:
http://www.usball.com/balls/default.html

Problem looks to be getting just one of each…

If you get no takers I can make some calls and try to get a few “samples”…

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