Can anybody calculate, this odd size gas tank, volume.

I am terrible in mathematics. I went to my kindergardeners p.t. conference
and his teacher told me he was off the charts in math!

It probably looked like the scene from forrest gump, when he met his kid for the first time.

Thank the lord I married for brains and looks

 

20.64 gallons to be really exact. I used my AutoCad to calculate it's volume and the known value of 0.004329 to convert cubic inch to gallon.

 

33 gallons! What, are you planning on leaving Bad Bob at the gas station? You might need some hazardous placards for transporting that much fuel.

 

33.67 US gallons and weighs 209.29 lbs if filled with regular unleaded*.
Weight would be 213.8 lbs. if with with premium*. *Not counting weight of tank.
Tank would hold 28.02 British Imperial gallons. (FYI)

 

It is easy to figure out.
The front is 90 degrees to the top and bottom and the top is half the lenght of the bottom.

So you take half the bottom which is the same as the top

18 X 36 X 8 = 5184

The other half is 8 at the bottom ( Same as the first half) and 0 at the top so you divide by 2 A right triangle you take the W X L X D and divide by 2

18 X 36 X 8 = 5184 (same as above)

5184 divide by 2 = 2592

add the two together

5184 + 2592 = 7776

7776 Divided by 231 = 33.662337 gals.

If the front was not 90 degrees to the top and bottom it would be alot harder to figure out.

That a lot of fuel

 

You can also Google it to determine your capacity. Good luck

 

I know my capacity and it isn't what it use to be I could use a tea cup for a gas tank and still have to stop to pee before I run out of gas

 

You already have all the calculator you need.

In AutoCAD, make the end cap of the tank into a poly-line (closed, of course), then type "_area" into the command line at the bottom of the screen. Then type in the letter "o" (for Object), and select the closed poly-line, then hit enter again.

The software will then spit out a total length of the perimeter, and a total enclosed area down in the command line.

Default settings will make these numbers inches of length, and square inches of area.

Then you just multiply the surface area of the end cap by the length of the tank, and divide by 231 cubic inches per gallon.

Viola!

(As my old man would say it Vie-O-La! )

 

I hate that you have revealed my secret gas tank.
Mine will have added features....
I think the location is excellent.
Its as far away from collision as possible.
It serves as a rear bulkhead and leaves maximum space for the trunk.
What filler cap are you planning?
I have been looking at marine filler necks and caps.

 

You can also right click on the polyline and select properties. That will give you the area as well. Multiply the area by the length and convert the volume to gallons the way you like best.

 

hello,
i fiqure 8,316 cubic inches. so if a gallon is 231 cubic inches, that would be 36 gallons. if it were 19 1/4" high.
18" high would be 33.7 gallons.

 

Just wait until all of the younger rodders get to be in there 60's they will understand the meaning of that statement, can you say "Flowmax" and it is not a octane booster!!!

 

This thread is still going on? I bought a 15 gal tank about 6 month ago.

 

Thanks, I didn't know I could do that. Thats just to easy...I guess that what happens when you don't read the instructions...

 

Indeed.

There is likely a way to do it through the menus too, but I learned to used AutoCAD back in R13, so some of the way I do things are a bit archaic. It's just that many of those things weren't accessible any other way until Ver 2000, so if you wanted to use the functions, you had to remember the commands.

Now I just do it out of habit.

No worries man, always glad to help. I find on here that there is very little that I know enough about to be helpful, so I gotta strike when the opportunity presents itself.

Working as an engineer, I spend plenty of time figuring things by hand, pencil and paper style, so I take any chance I can get to cheat.

 

Oops

 

Once, when I was a development engineer at Ford's Engine Performance Development Group, We were considering two cylinder head designs with different combustion chambers. Someone wanted to know which design had the larger quench area. The drafting room guys said they needed some time to figure out the differences in the two chambers areas. I grabbed the two sample heads and set them on a Xerox machine and made a paper copy. Then I took some scissors, cut out the chambers and walked down the hall to a lab that had a digital gram scale that was accurate to six decimal places, weighed the two chamber shapes, and quickly calculated the % of quench area of the two designs, all before the meeting ended.

...made brownie points with the big boss that day.

 

All good statistics here but for future reference Google fish tank volume, and it will ask you for the dimensions, put in the hieght, length, and in your case for the width use the top width and the bottom width average, in other words 8 in. and 16 in. averages to 12. Plug those in to the table and it will compute for you, the neat part is you can play with the numbers untill you get the volume you want. I used this when I made my tank because it's just like yours, mine is behind the seat on my 29 and is angled for the angle of the seat. I tweaked the numbers to fit in the space and give me 16.3 gallons. I figured that was about all I could afford to put in at one time!!