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"Header" tanks are highly recommended on any R/C helicopter. Besides adding fuel capacity, the header tank prevents any chance of air being drawn into the engine feed line since the header tank stays completely full until your main tank is empty. ALSO, it's much easier to see the header tank than the main tank on most helis. There are several header tanks on the market, but this one is both the best design and the best value. The 2-ounce tank is the industry standard Kraft Hayes complete with outlet nipple, clunk and clunk line. This high strength tank is perfect for the job regardless of the engine. The big difference is the mounting system. Ours uses the widest, most rugged strap which is precision CNC machined in the USA. The split bracket allows for easy tank insertion and extremely secure mounting. The (included) 3mm mounting bolt installs flush inside the mounting tang, which is designed to mount on any heli including the preferred position on the Raptor 30 series.
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Below right is a typical installation. Note that the outlet on the header tank is in the preferred position, just slightly below the center of the carburetor. In this case a mounting hole was drilled in the frame (Kalt 46 Baron), but in most cases you can use an existing hole to mount the tank.
The CLUNK line on the header tank is attached to the carburetor feed line. Here you see the JR "T" fuel filter and KSJ fuel line clamp and plug, which is the neatest and most efficient setup but is not required. The VENT line on the header tank is connected to the CLUNK line on the MAIN fuel tank. The main fuel tank's vent line is connected to the muffler pressure tap, or to the pressure tap on the YS engines.
Fueling is done through the header tank clunk line. When the header is full the fuel "vents" into the main tank. In operation, the engine draws from the header tank which in turn draws fuel in from the main tank.
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