Hand-made Almost Ready to Fly R/C Model Aircraft ASSEMBLY MANUAL Kit features • • • • • • • Ready-made—minimal assembly & finishing required. Ready-covered—including decals, trim & covering. Factory-installed pushrods. Factory-installed metal engine mount. Factory-pinned & glued control surface hinges for ultimate safety. Comprehensive hardware pack including wheels, tank, spats,undercarriage& spinner. Photo-illustrated step-by-step Assembly Manual.
EXTRA 300S Instruction Manual INTRODUCTION Thank you for choosing the EXTRA 300S ARTF by SEAGULL MODELS. The EXTRA 300S was designed with the intermediate/advanced sport flyer in mind. It is a semi scale airplane which is easy to fly and quick to assemble. The airframe is conventionally built using balsa, plywood and veneer to make it stronger than the average ARTF , yet the design allows the aeroplane to be kept light. You will find that most of the work has been done for you already.
EXTRA 300S INSTRUCTION MANUAL NOTE: To avoid scratching your new aeroplane we suggest that you cover your workbench with an old towel. Keep a couple of jars or bowls handy to hold the small parts after you open the bags. Please trial fit all parts. Make sure you have the correct parts and that they fit and are aligned properly before gluing! This will ensure proper assembly as the EXTRA 300S is made from natural materials and minor adjustments may have to be made.
EXTRA 300S Instruction Manual WING ASSEMBLY NOTE: We highly recommend using 30 minute epoxy as it is stronger and provides more working time, allowing the builder to properly align the parts. Using fast cure epoxy when joining the wing halves could result in the glue drying before the wing halves are aligned properly which may result in failure of the wing centre section during flight. ! 1. Locate the plywood wing dihedral brace. Using a ruler, locate its centre and draw a vertical line .
EXTRA 300S INSTRUCTION MANUAL INSTALLING THE AILERON SERVOS. Use a small weight (Weighted fuel pick-up) and thread to feed the servo connector through the wing as shown. Small weight Servo (2pcs). Small weight. Thread Thread. ! 1) Remove servo tray from the each panel of wing. Install servo and servo arm. See pictures bellow. ! 2) Install the rubber grommets and brass collets onto the aileron servo. Test fit the servo into the aileron servo mount.
EXTRA 300S Instruction Manual INSTALLING THE AILERON LINKAGE Thread ! 1) Using a ruler & pen to draw a straight line as below picture. Servo electric wire Servo arm ! 3) Install the aileron servo tray into the servo mount. Repeat the procedure for the other wing half. ! 2) Locate nylon control horns, nylon con- trol horn backplates and 2 machine screws.
EXTRA 300S INSTRUCTION MANUAL ! 3) Position the aileron horn on the bottom side of aileron. The clevis attachment holes should be positioned over the hinge line as shown below. clevis Control Horn Aileron Torque rod Mounting Screws Mounting Plate ! 4) Using a 1mm drill bit and the control horns as a guide, drill the mounting holes through the aileron halves. ! 5) Mount the control horns by inserting the screws through the control horn bases and aileron halves, then into the mounting backplates.
EXTRA 300S Instruction Manual FUEL TANK PARTS REQUIRED ! ! ! ! {1} {1} {1} {1} Molded Nylon Fuel Tank Preassembled Stopper Assembly Metal Weighted Pick-Up Silicon tube ! 5) With the stopper assembly in place, the weighted pickup should rest away from the rear of the tank and move freely inside the tank. The top of the vent tube should rest just below the top of the tank. It should not touch the top of the tank.
EXTRA 300S INSTRUCTION MANUAL ! 5) Attach the Z-Bend in the pushrod wire to the throttle arm on the carburetor. You will need to remove the throttle arm from the carburetor to be able to attach the Z-bend. When complete, reattach the throttle arm to the carburetor. Vent tube Fuel fill Tube Fuel Pickup Tube Blow through one of the lines to ensure the fuel lines have not become kinked inside the fuel tank compartment. Air should flow through easily.
EXTRA 300S Instruction Manual Landing gear ! 2) A drop of C/A glue on the wheel collar screws will help keep them from coming lose during operation. Repeat the process for the other wheel. INSTALLING THE MAIN LANDING GEAR ! 1) The blind nuts are already mounted inside the fuselage.
EXTRA 300S ! 3) Using the hardware provided, mount the main landing gear to the fuselage. INSTRUCTION MANUAL Because of the diameter of the cowl, it may be necessary to use a needle valve extension for the high speed needle valve. Make this out of sufficient length 1.5mm wire and install it into the end of the needle valve. Secure the wire in place by tightening the set screw in the side of the needle valve. 1.
EXTRA 300S Instruction Manual ALIGNING THE HORIZONTAL STABILIZER ! 1) Using a ruler and a pen, locate the centerline of the horizontal stabilizer, at the trailing edge, and place a mark. Use a triangle and extend this mark, from back to front, across the top of the stabilizer. Also extend this mark down the back of the trailing edge of the stabilizer. Wood screw. 3MM x 12MM ( 4 pcs) Draw centerline INSTALLING THE SPINNER Install the spinner backplate, propeller and spinner cone.
EXTRA 300S INSTRUCTION MANUAL ! 4) Remove the stabilizer. Using the lines you just drew as a guide, carefully remove the covering from between them using a modeling knife. alumium plate Remove covering 3MM x 12MM Tail gear When cutting through the covering to remove it, cut with only enough pressure to only cut through the covering itself. Cutting into the balsa structure may weaken it.
EXTRA 300S Instruction Manual VERTICAL STABILIZER INSTALLATION Hinge ! 7) When you are sure that everything is aligned correctly, mix up a generous amount of Flash 30 Minute Epoxy. Apply a thin layer to the top and bottom of the stabilizer mounting area and to the stabilizer mounting platform sides in the fuselage. Slide the stabilizer in place and realign. Double check all of your measurements once more before the epoxy cures.
EXTRA 300S INSTRUCTION MANUAL ! 3) While holding the vertical stabilizer firmly in place, use a pen and draw a line on each side of the vertical stabilizer where it meets the top of the fuselage. pen ! 6) When you are sure that everything is aligned correctly, mix up a generous amount of Flash 30 Minute Epoxy. Apply a thin layer to the mounting slot in the top of the fuselage and to the sides and bottom of the vertical stabilizer mounting area.
EXTRA 300S Instruction Manual Control Horn ELEVATOR - RUDDER PUSHROD INSTALLATION. Rudder pushrod Mounting Screws Mounting Plate ! 3) Using a 1.5mm drill bit and the control horns as a guide, drill the mounting holes through the elevator halves. Elevator pushrod ! 4) Mount the control horns by inserting the screws through the control horn bases and eleva- tor halves, then into the mounting backplates. Do Not overtighten the screws or the backplates may crush the wood.
EXTRA 300S INSTRUCTION MANUAL ! 2) Using a 3/32” drill bit, drill a hole through the side of the fuselage, opposite the muffler, even with the switch. ! 3) Make a push-pull lever out of scrap wire. Attach the wire to the switch lever and route the wire out the side of the fuselage, through the hole you drilled. ! 6) Install adjustable servo connector in the servo arm. Adjustable Servo connector Some switches come with a hole drilled through the switch tab for this very purpose.
EXTRA 300S Instruction Manual INSTALLING THE RECEIVER AND BATTERY ! 1) Plug the five servo leads and the switch lead into the receiver. Plug the battery pack lead into the switch also. ! 2) Wrap the receiver and battery pack in the protective foam rubber to protect them from vibration ! 3)Position the battery pack in the fuel tank compartment and the receiver just behind the fuel tank . Use extra foam pieces to hold them in position.
EXTRA 300S INSTRUCTION MANUAL BALANCING ! 1) It is critical that your airplane be balanced correctly. Improper balance will cause your plane to lose control and crash. The center of gravity is located 4cm back from the leading edge of the wing, measured at the wing tip. ! 2) If the nose of the plane falls, the plane is nose heavy. To correct this first move the battery pack further back in the fuselage.
EXTRA 300S ! D) Check the throttle. Moving the throttle stick forward should open the carburetor barrel. If it does not, flip the servo reversing switch on your transmitter to change the direction. ! E) From behind the airplane, look at the aileron on the right wing half. Move the aileron stick to the right. The right aileron should move up and the other aileron should move down. If it does not, flip the servo reversing switch on your transmitter to change the direction.
Hand-made Almost Ready to Fly R/C Model Aircraft ASSEMBLY MANUAL Kit features • • • • • • • Ready-made—minimal assembly & finishing required. Ready-covered—including decals, trim & covering. Factory-installed pushrods. Factory-installed metal engine mount. Factory-pinned & glued control surface hinges for ultimate safety. Comprehensive hardware pack including wheels, tank, spats,undercarriage& spinner. Photo-illustrated step-by-step Assembly Manual.
