Mass Of Common Projectiles...

Post questions and info about things you have launched or thought about launching. No posts about explosive projectiles!

Postby akb » Sun Dec 05, 2004 8:08 pm

It would be nice if we had not only the mass, but the diameter and what pipe it fits properly into. All that info would nicely go together.

I got some Walmart fun balls which look like tennis balls and come in a box of 20 for $4.44. They seem to be the same mass as tennis balls, 58g. Their diameter is ever so slightly smaller, with full new fuzz they fit just slightly looser into SDR21 2.5" than a used standard tennis ball. Both standard and fun balls fit into 2.5" Schedule 40 PVC pretty snugly. Either works well.

Also, from a lot of modelling I can say that the best mass for a tennis ball is right around double the factory 58g. Add water, sand, pennies or lead shot inside the ball and bring it up to 120g or so and it will travel farther and higher, at least from pneumatic launchers. Don't know about others but it should be the same.

-- akb
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Postby Rudesill Ballistics » Mon Jan 03, 2005 10:27 am

All I can add is this link, which tells you the weight of any battery you wish.

<a href="http://www.powerstream.com/Size.htm">Standard Cylindrical Battery Sizes</a>

BTW: C-Cells are 2.29 oz or 65 grams.
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Postby pyroben » Tue Feb 15, 2005 8:21 pm

The little squishy ear plugs work great in my mini. Ironicly they are loud.;)
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Postby sniperjosh » Tue Feb 22, 2005 3:34 am

anyone know the weight of wax, as in its density?? im tying to figur eout the weight of a 10mm x 16mm wax slug, the wax is just as used in candles...
thanks.
--josh
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Postby plasticex009 » Tue Feb 22, 2005 4:23 am

Paraffin (aka candle wax) has a density of 0.898 grams per cubic centimeter.
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Postby ryanpowell167 » Wed Feb 23, 2005 9:48 pm

Hey EvilEyeMonkeey, GGDT 4.0 will actually measure in oz too. Just go to the top, hit file then configuration. It should alow you to measure in oz grams and grains. So before you go off on someone search for a mass translator or just change the config in GGDT for a sec.
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Postby plasticex009 » Wed Feb 23, 2005 10:04 pm

Ryanpowwel167, that post was over a year old. It came way before GGDT 4.
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Postby Mellowout » Mon Apr 18, 2005 8:26 pm

I dont know if this has been posted yet, but ive found that taking a piece of tube the same size as your barrel is, and putting water in it, and sealing it off on both sides (i used practice golf balls for my 1.5 inch pneumatic) and freezing it overnight, then running hot water over it, you can take it out and have a near perfect fit for your barrel. i shot it at only 55 psi and it went very far.
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Postby BillyBobJoe » Mon Apr 18, 2005 9:17 pm

Mellowout - tis is for the MASS of common projectiles, so unless you know the mass of a certain length/dia. of ice, you should post it in your own topic in the ammo section (although it already been done)
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Postby plasticex009 » Tue Apr 19, 2005 12:21 am

Mellowout, to find the mass of your projectiles use this equaiton:

Mass = #928;/4 * Diameter<sup>2</sup> * Length * .92

Mass is in grams.
Length measurements must be in centimeters.

Edit:
.92 is the density of ice in grams per cubic centimeter.
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