ORIGINAL: bubbap51
I have read posts where people use a header tank along with the regular tank. What is the purpose of this arrangement and how is it set up?
Some planes are set up with the tank on the CG. Depending on the size of the model, that can be pretty far from the engine. With some engines, that matters. Having a secondary tank near the engine cures that problem.
In fact, guys discovered years ago that a large fuel filter close to the engine helps solve the same problems.
Lot's of things work for specific problems and aren't needed everywhere.
Ever hear of a "chicken hopper" tank?