How much will this hold?

[Guest]

Any math whiz's out there that can tell me how much powder ( @ pounds ) can a hopper/container hold that's 6" in diameter and 10" deep?

[Guest]

Re: How much will this hold?

Depends on the volume of a pound of powder. Will gallons work for you?

[BeeBob]

Re: How much will this hold?

Naw, I'm just trying to get an idea for an average size for the new bigger hopper. I'm thinking @ 5 pounds or so so far without breaking out the real thing to measure! thanks

[Guest]

Re: How much will this hold?

1 math geek here! OK...there is no way to just do what you want...but I can tell you what you need to figure it out...

volume of a cylinder = pi * radius^2 * height

simple right!

in english that means... pi (3.14159 will get you close enough) x the radius (half the diameter) of the cylinder squared x the height

or in your example: 3.14159 * 3^2 * 10 = 282.7431 cubic inches. I bet TheKing could tell you a nice average (or i guess maximum would be better) cubic inches for the amount you want. + head space eh?

If you give me numbers i can get you a tube size that will work...ie how many cubic inches you want in space...actually i bet you make everything out of 6" pipe eh? so how about a magic formula for that...

Height of tube * 28.27431 = total volume of a 6" pipe in cubic inches

Your mileage may vary as the pipe probably isn't 6" on the inside

if it is really 5.5 inches on the inside (I think that is about right eh?)

Height of tube * 23.758274375 = total volume in cubic inches

[Guest]

Re: How much will this hold?

The problem is in the weight of the powder. For instance, as Juan was saying, getting a gallons number is easy, then you can convert to pounds, because a gallon of water weighs 8.34 pounds, (water industry common known factor)

To know exactly what you are looking for, you would need to know how much a cubic inch or cubic foot of powder weighs exactly.

Now if you can get that number, I can do the rest for you,

Thanks for the pounds formula history lesson Juan Been a while since I have done the books, and the computer at work automatically calc's that for us now a days.

[Guest]

Re: How much will this hold?

I don't know if this will help or not.....but depending on how "fluffy" the powder is, those 1gal Rubbermaid containers I get from walmart will hold right at or just under 5lbs of powder. I would figure you need to be at the equivalent of about 1 1/4 gal size or a little bigger to have some spare room in it.

[Guest]

Re: How much will this hold?

Yes Harleydad, it would work, but only to a good guess, unless the powder is packed in there top to bottom, side to side level at the top.

Let me know the measurements, and I can tell you pound per cubic inch, then all you gotta do is multiply, (or devide if your that kind of guy)

[Guest]

Re: How much will this hold?

Any math whiz's out there that can tell me how much powder ( @ pounds ) can a hopper/container hold that's 6" in diameter and 10" deep?

Actually just pour one pound of powder in a 6" tube measure the depth multiply by five and wala!! I bet money you have a pound of powder near by! Anyway thats what I would do or cheat even worse and call one of my sons their math majors.

[Guest]

Re: How much will this hold?

hmmm actually the specific gravity is listed on each powder pbtp sells

most seem to be around 1.2 but some are a range from 1.2 to 1.8? no idea what that means but 1.2 means that a volume of the powder weights 1.2 times more than the same volume of water, so that comes out to very close to 10 pounds of powder per gallon at the 1.2 SG. so for your 5# hopper, you need a half gallon of volume + head space. I don't know what your % of head space is so I can't tell you exactly, but a gallon is about 232 cubic inches so your 6"x10" pipe is just over 1 gallon in volume.


and yes I can do the math backwards if you give me the size of a known hopper, though a 50# one is a lot bigger, the ratio of head space may be different on a smaller one.