Steve's post of the year, smart folks please reply

   / Steve's post of the year, smart folks please reply #1  

stevenf

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Oct 30, 2004
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Location
Boerne, Texas
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Kubota M9000
Steve\'s post of the year, smart folks please reply

I've got a diesel tank mounted on its side on a stand for my tractor that if full holds 300 gallons, it is 45" up and down (from one side of the circle to the other), 50" long side to side and 143-1/2" or almost 12' around. Picture a very big coke can laying on its side, 6' in the air. It has a flapper type fuel fill outlet on the top that I can check the amount of fuel left in the tank by sticking a stick straight down to the bottom of the tank. Starting at 1" thru 45"s how much fuel per inch do I have? Obviously the only thing I know for sure is at 22-1/2"s I have 150 gallons, other then that its a guess. I realize this is a math question and something to do with pie and computation but when you engineers were doing algebra, trig, physics and calculus I was learning how to operate a printing press and all I needed to worry about was keeping my hands out of it when running, I didn't learn to do that right away either but one finger less and I figured it out real quick (they did sew it back on, it works but I can't feel a thing).
Steve
 
   / Steve's post of the year, smart folks please reply #2  
Re: Steve\'s post of the year, smart folks please reply

Here is a website that will figure the volume of a cylinder for you.
It is at least a place to start.
 
   / Steve's post of the year, smart folks please reply #3  
Re: Steve\'s post of the year, smart folks please reply

The tank on it's side causes more work to figure this out than if it was upright.

See what the Dr. Math has to say about a similar problem.
 
   / Steve's post of the year, smart folks please reply #4  
Re: Steve\'s post of the year, smart folks please reply

Divide 300 by 45 or 150 by 22.5 = 6.667. Would not that be close enough? /forums/images/graemlins/smile.gif
 
   / Steve's post of the year, smart folks please reply #5  
Re: Steve\'s post of the year, smart folks please reply

The easy way is wait til it gets down below half, and be there when the delivery man fills it.

If you talk nicely to him (offer him a cold drink), he might pause every 50 gallons to let you measure. You could get it to half depth, then start recording gallons/heigth. That should be close enough for what you want...................

Ron
 
   / Steve's post of the year, smart folks please reply #6  
Re: Steve\'s post of the year, smart folks please reply

That would only work if cyl was upright so shape stayed constant. I would just stop the flowmeter every 5,10 or 20gals (how precise)when filling and mark my stick.
Never was accused of being a genious, so I always find a dumb way of doing things. /forums/images/graemlins/laugh.gif
 
   / Steve's post of the year, smart folks please reply #7  
Re: Steve\'s post of the year, smart folks please reply

Steve,
Here's what you're looking for. This assumes you don't have heads on the vessel. If you need to figure the head volumes, let me know.
 

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   / Steve's post of the year, smart folks please reply #8  
Re: Steve\'s post of the year, smart folks please reply

Here is an online calculator for your problem. If you put in the Radius: 22.5; Length: 50 and then the Height (45-inches to fuel), it should tell you the amount of fuel remaining.

I put in a height of 45 (if it was full) and it calculates 344 gallons. I think you may want to re-measure the tank. Take into account the width of the cylinder walls. Using a Radius of 21" and a height of 42" gives pretty close to 300 gallons. Regardless, this should help you out.
 
   / Steve's post of the year, smart folks please reply #9  
Re: Steve\'s post of the year, smart folks please reply

</font><font color="blue" class="small">( I put in a height of 45 (if it was full) and it calculates 344 gallons. I think you may want to re-measure the tank. Take into account the width of the cylinder walls. Using a Radius of 21" and a height of 42" gives pretty close to 300 gallons. Regardless, this should help you out. )</font>

That's what I found too, I subtracted an inch in each direction (2" per dimension) and it looks pretty good; it doesn't look like I can paste my excel file; but Gatorboy's link should treat you well.
 
   / Steve's post of the year, smart folks please reply #10  
Re: Steve\'s post of the year, smart folks please reply

</font><font color="blue" class="small">( The easy way is wait til it gets down below half, and be there when the delivery man fills it.

If you talk nicely to him (offer him a cold drink), he might pause every 50 gallons to let you measure. You could get it to half depth, then start recording gallons/heigth. That should be close enough for what you want................... )</font>

Don't know why that very realistic method "sparked" a much "quicker" method in my imagination, but how about:

wait until it's almost empty, then check the level with a match. When they come out to pick up your pieces, I bet they'll do all sorts of interesting calculations! /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
 

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