How to Set Up a Gasoline Fuel Tank for an RC Plane

Written by larry simmons
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How to Set Up a Gasoline Fuel Tank for an RC Plane
Keep your RC aeroplane airborne, regardless of the angle, by maintaining the fuel supply. (avion modele reduit, torqueroll image by ricky_68fr from

Flying your RC model aeroplane requires a steady, even flow of fuel from the fuel tank to the engine. Interrupt that flow and the plane falls quickly to earth. You can avoid this scenario by building a dependable fuel tank with a fuel tank kit.

Skill level:

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Things you need

  • Fuel tank kit
  • Utility knife
  • Fuel tubing, 2 colours

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  1. 1

    Clear any debris from the tank that's remaining from the plastic moulding process by washing the tank out with mild soap and warm water. Rinse the tank with clear water after washing and then allow it to dry out completely before continuing.

  2. 2

    Push one of the metal or plastic tubes through one of the holes around the edge of the rubber stopper, leaving a 3/4-inch section of the tube sticking out from the front. Place the second tube parallel to the first with the ends aligned. Measure a point on the tube 3/4 inches from the rear of the stopper on the second tube and mark the point. Cut the tube with a utility knife at the mark, then sand the end smooth. Wipe away any sanding debris. Place the second tube through another hole in the stopper perimeter.

  3. 3

    Place the front and rear plates onto the stopper over the two placed tubes and then screw the plates together loosely with the plate screw.

  4. 4

    Measure the distance from the edge of the fuel tank opening to the upper inside wall of the fuel tank. Bend the longer tube in the stopper in a gentle sloping angle past the rim of the stopper until the end of the tube reaches the height of the measured fuel tank wall.

  5. 5

    Cut the scrap piece of the metal or plastic tubing to a 2-inch length. Cut a 1-inch piece of the fuel tubing and place on the end of the 2-inch tube, sliding it over the tube about 1/4 inch. Place the chunk onto the other end of the 1-inch fuel tubing. Slide a longer piece of fuel tubing onto the other end of the 2-inch tube. Place the combined tube alongside the fuel tank and cut the longer piece of tubing so the entire combined tube will fit into the fuel tank flush with the bottom of the stopper and extend so the chunk is just short of touching the bottom of the tank.

  6. 6

    Attach the combined fuel tube to the unbent tube through the rubber stopper. Slip the two tubes into the fuel tank and push the rubber stopper into the tank end. Make sure the bent wire comes close to but does not touch the edge of the fuel tank, and that the chunk on the end of the fuel tubing swings freely at the end of the tube without touching the bottom of the fuel tank. Pull the stopper out and adjust the length of tubes if needed. Tighten the screw to secure the stopper in place.

  7. 7

    Mount the fuel tank into the aeroplane following the plane plans. Attach the longer line to the carburettor to serve as a feed line for the fuel from the tank. Attack the shorter vent line to the muffler's pressure fitting. Use different coloured tubing to stretch from the tank to the engine so that you do not mix the two fittings.

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