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Potato mass

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Potato mass

Unread postAuthor: Shrimphead » Sun Jan 08, 2006 10:52 am

Does anybody know the mass of an average potato? I want to make sure that I'm putting the right numbers in on GGDT.
Thanx
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Unread postAuthor: boilingleadbath » Sun Jan 08, 2006 12:41 pm

Well, you'll be cutting them, so you can basicaly consider them cylinders. They are pretty close to the density of water, so that's 14g/cubic inch. (acctual density [I checked] is 1.1, so roughly 15.4 g/cubic inch)
In the lakte tests, their slugs where an average of 2" long.

Thus, 28*pi/4*barrel diameter^2
(a 2" barrel would by roughly 120g, for instance)
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Last edited by boilingleadbath on Tue Mar 14, 2006 5:13 pm, edited 1 time in total.
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Unread postAuthor: Shrimphead » Sun Jan 08, 2006 12:47 pm

and what would it be for a 1.5" barrel?
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Unread postAuthor: boilingleadbath » Mon Jan 09, 2006 6:28 am

WTF is your problem? Go plug 1.5" into the equation, or if you want 2 digits of accuracy, go look up the actual internal diameter of 1.5".

You can't expect other people to do all your work for you.
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