Technical Double chech my gas tank math

I'm getting roughly 16 gallons, but visually doesn't looks that big.

Slightly irregular triangle
33" wide, 8" tall x 27 (average)



(8x27) /2 = 112
(112x33) / 231 = 16 gallons.
Makes sure I'm not fucking up. No way does it look or feel like a 16 gallon tank
Thanks

 

You're close enough, as far as I'm concerned.
8 x 27= 216/2 = 108
108 x 33 = 3564 x .00433 = 15.43 gallons.

 

I would change the 8" to 6.5"

 

I think your math checks out. Assuming your measurements are accurate, that volume should be close.


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U

why ?

 

If you draw a horizontal line even with the bench top, there looks to be a lot less volume behind the top of the 8 mark than in front of it.

 

Once you get it built, set it up on some wood blocks and then fill it with water one measured gallon at a time, all the way to the brim. Then let it sit for a day or two to check for leaks. Two tasks accomplished with one filling and you'll know exactly what the volume is. Gary

 

33" x 27" x 6.5" = 5791.5 divided by 231, cubic inches per gallon gives me 25.071428.

I get 25 gal... no?

 

8 X 27/2 = 108, 108 X 33 = 3564, 3564 X 0.004329 = 15.428 Gallon's. (0.004329 gallon = 1 cubic inch)

 

you got a nice curve there, you should be doing an integral.

 

fill that mock-up with packing peanuts , then pour them into 5 gallon pails

 

108 according to my calculator. 112 according to your calculator. Just it blame on Texas Instrument

 

Nice diagram Jim. What is the sum ?

 

that's the tricky part...figure out what f(x) is.

 

or you could do it the crude way, and mark off one inch wide strips, and measure how long each one is, and add them up.

But the packing peanuts idea is the best one...

 

Feynman would say there is no math accurate enough to be absolutely positive and to accept doubt. So what's the point if not even simple 1 + 2 isn't met ?

 

Not trying for exact but if so there would be
1 large triangle, 1 small triangle, 1 tiny triangle and one small rectangle and one small triangle to subtract. all by 33"

Subtract 3x1 tri.
24x7.5 tri
3x8.5 tri
.75x4 tri
5.5x7.5 rectangle

That's why I just cut the averages

 

I'm sure I'm close, but wouldn't you (I) want to know the capacity is adequate enough before it's built?
Just saying

Where's the peanuts ?

 

Did I hear Peanuts ?

 

There's a box with about 18 gallons of peanuts, sitting in my dining room. My wife ordered something, that's how it came packed.

I guess I should save them, for the next gas tank I have to mock up

 

How much space will a 1 pencil, 1 sheet of paper and 1 calculator save versus 1 box of unknown size since content has seemingly been removed ?

 

Yes, but it had to fit a certain space in my frame, so it was going in regardless of the exact capacity. In my case, my math was off and the tank held more than expected! Happy Face. Besides you have to leak test it anyway, right? Gary

 

well it is NOT a rectangular prism so
i figger 30.857145 gallons probably LESS than that...
my math is dull, and the slide rule is old, and the pencil needs sharpened...lol
can't wait for the final gallonage.
nice work there 31

 

Right. But to triangles together will create a rectangle. This is why the width (33") is divided by 2. By doing that, your answer will be a lot closer that way. But just dividing your answer in half will be a lot closer than 30.857145 gallons.

 

guess i'm guessing so we wait
ya know if ya set 3 5gallon cans next to each other kinda represents the 15 or so

Thanks Johnny

 

math is hard.

 

Pretend I drew the lines straight ok.
What the area of 1 triangle?




Exactly 1/2 of the rectangle.

 

Uu- hu! That's why I asked for a check
Da,n sure don't like it will hold 15 gallons

 

i doknow it might SURPRISE ya

 

The math says it fits.
Eye balls say different