Model Tech Magic Formula 3D ARF Manual page 28

STEP 2: INSTALLING THE STOPPER ASSEMBLY
PRO TIP
If you have trouble seeing the vent tube, hold the fuel tank assembly up to a bright light. This will illuminate the
inside of the fuel tank, making it easy to see the tubing inside.
When satisfied with the alignment, tighten the machine screw until the rubber stopper expands and seals the fuel tank opening.
IMPORTANT Don't overtighten the machine screw or you might strip the threads in the small metal plate or split the fuel tank.
With the rubber stopper assembly installed, double-check to make sure that the fuel pick-up can move freely inside the fuel tank.
Ideally, the fuel pick-up should be about 1/4" in front of the back of the fuel tank.
STEP 3: INSTALLING THE FUEL TANK
Feed the ends of the fuel tubing through the predrilled hole in the firewall and slide the fuel tank into position, making sure that
the stopper assembly lines up with, and is firmly pushed into, the predrilled hole in the firewall.
IMPORTANT When you slide the fuel tank into position, make sure that the top of the fuel tank is toward the top of the fuselage.
To align the fuel tank properly, the fuel tank should be pushed forward as far as possible and the fuel tank should be level from
front to back.
Push the metal neck-reinforcement ring over the neck of the molded
fuel tank opening, then carefully push the stopper assembly into the
molded hole in the front of the fuel tank and rotate the stopper assembly
until the aluminum vent tube rests inside the bubble in the top of the
fuel tank.
Cut two pieces of silicone fuel tubing (not included) to a length of 8"
and install them to the aluminum tubes at the front of the fuel tank.
PRO TIP
Mark the ends of the silicone tubing "vent" and "pick-up"
so you don't confuse them when it comes time to connect them to the
engine later on.
Use your favorite method to secure the fuel tank into position. We
supported the top and bottom of the fuel tank with thick pieces of foam
rubber, then we glued a piece of scrap plywood to the inside of the
forward bulkhead, directly behind the fuel tank, to keep the fuel tank from
sliding backward.
Make sure that the fuel tank is held firmly in place. The last thing
you want is for it to come loose during flight. It's important that it can't
slide backward during flight.
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