Quote Originally Posted by jiott View Post
Just one thing-you say that when you have the wing tanks nearly full you will have "considerably" more head pressure than with only 3 gallons. This is only true to a very small extent since head pressure depends only on height above the measuring point, not volume. Because the wing tanks are fairly thin heightwise, a full vs. empty tank only gives you a couple more inches of head pressure. I believe a rule of thumb is about 1/2 psi per foot of height!

Jim
0.43 to be exact. Haha don't mean to be a smart ass but I do this stuff for work all the time and someone might be interested to know.