Question for the math guys

[john73738]

Here's food for thought (pun intended)...

If you have six oranges and two apples,

and you divide the six oranges by two apples,

What do you get?

I give up.... I just grew up in a house that My mom always told me if they did not know what "X" was how the heck should I. (Hehehehe)

Hence my suckage at math.

I have one college class of algebra almost 20 years ago, but I am going back to school in the fall semister.

 

[CHOMPERS]

A = pi x r^2,
is the formula for the area of a circle.

The final answer is the total cross sectional area of your holes.

Here's food for thought (pun intended)...

If you have six oranges and two apples,

and you divide the six oranges by two apples,

What do you get?

The answer is none of the above. You can't compare apples and oranges.

 

[CHOMPERS]

The moral of the story is that you can't throw a bunch of numbers together and expect it to mean anything. The numbers (or variables) have to have meaning before you start, and the math functions have to have meaning too.

The math formula(s) handle the meaning as long as you know what the formula is for. Then the imputs are fairly straight forward (your drill size and number of holes).

 

[john73738]

Thanks in advance for the lesson, I really appreciate it since math is not a strong suit for me and I really do wish to understand.

So....

If A = pi x r^2 is the area of each drilled hole then,

A*18 = the total area of drilled holes in my spray bar ?
Being 1.988 inches ?

I think I got that ... Phew ....

So how does this relate to flow from the pump?

Seriously, I really appreciate you patience helping me understand this so I dont have to ask this question again.

 

[CHOMPERS]

Now you are thinking like a mathematician. That's very good.

The flow from the pump is that apples and oranges thing. There is a ton of hairy math to work out if you want to do it that way. The good news is you don't have to do anymore math; there is a cheater way. The total area of the holes should be equal or close to the area of the supply plumbing (which should be the same size or a size larger than the output of the pump). The area of all sizes of plumbing you are likely to use is in the sticky.

 

[CHOMPERS]

BTW, if your plumbing is one inch, you would need seven holes.

You can calculate the hole size or number of holes like this:

A(p) = A(h) x N(h),

where,
A(p) = the area of the supply pipe
A(h) = the area of a hole
N(h) = the total number of holes

using algebra,

A(h) = A(p) / N(h)
or
N(h) = A(p) / A(h)

 

[john73738]

Ok So rather Than focusing on the ghp I should focus on the area of the pipe and holes drilled for the spraybar. So I have in actually 2.57(ish) times the area necessary to keep from reducing the flow of my pump. Thanks that really does simplify things

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