well header tanks are great, they prevent air from entering the fuel line when performing
numerous 3d stunts, in turn causing the engine to "hick-up" or stall. the act as a air trap pretty
much, also depending on the size they can add to flight time. i use mine (by accident) for an
emergency. i was running and forgot to check my fuel level and i was on the header tank so it
saved me pretty much.



there great and I would get one, consider them as necessary as blades or for some training gear.