Fuel Tank build

[warthog5]

Here's some things I've learned. When testing a tank under preasure.
1st you only need about 1lb of preasure. I took it to the high side of 1lb. IE the needle on a 0 to 15lb guage was just to the right of the 1lb mark and it was touching that mark.
THAT'S IT NO MORE!

My brother has a really sharp guy working for him he said if you take it to 4lbs that sucker will unzip itself. I belive him.[^]






Here's some interesting data from brother Rick.

Here is something you can show to the people that think you should
pressurize your tank to several psi for testing. I put together a quick
model and analyzed it in my finite element program (stress analysis). I
modeled it to the same dimensions as your tank and even put in the interior
baffles as they add to the rigidity of the tank. I then put a load of 1 psi
internal pressure. You can see the results. The max stress is the orange
area which equals 130,599 psi. Just so you know, the material we used
yields (permanently bends) at about 100,000 psi. I assume what is happening
is that the area that is permanently bending is small and that is why it is
not showing up. However, it probably won't take much higher pressure to
open this thing up. The orange areas show you where it will most probably
open up first.