Running a header tank is bad news and problematic. Yes, you can find such practices in some full scale devices, but you will invariably find a pumped and pressure regulated fuel delivery system that has been well engineered. Not a purely suction fed carburetor, like the types we use in modeldom.

I'll bet I can get an hour or more of flight time while flying a four-stroke .70 glow engine and using a 12 ounce fuel tank, simply by throttling back. A 40 ounce tank is way too large for a suction fed engine and the problems that such a large fuel tank will cause are not moderated with the use of a header tank.


Ed Cregger