MS:56H ASSEMBLY MANUAL Specifications Wingspan ------------------------------ 63 in -------------------------- 160cm. Wing area ----------------------------- 728 sq.in ------------------ 47 sq.dm. Weight ---------------------------------- 8.4-9.9lbs -----------------3.8-4.5kg. Length ---------------------------------- 59.4 in ------------------------- 151cm. Recommended engine size ------ .91-1.25 cu.in ----------- 2-4stroke. Radio System required 6 channel with 6 digital servos.
EXTRA 260. Instruction Manual. INTRODUCTION. Thank you for choosing the EXTRA 260 ARTF by SEAGULL MODELS. The EXTRA 260 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 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.
www.seagullmodels.com TOOLS & SUPPLIES NEEDED. Tail section assembly ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Thick cyanoacrylate glue. 30 minute epoxy. 5 minute epoxy. Hand or electric drill. Assorted drill bits. Modelling knife. Straight edge ruler. 2mm ball driver. Phillips head screwdriver. 220 grit sandpaper. 90° square or builder’s triangle. Wire cutters. Masking tape & T-pins. Thread-lock. Paper towels. ! (1) Horizontal stabilizer/ elevator halves. (1) Rudder halves. Some more parts.
EXTRA 260. Instruction Manual. HINGING THE AILERONS. Note: The control surfaces, including the ailerons, elevators, and rudder, are prehinged with hinges installed, but the hinges are not glued in place. It is imperative that you properly adhere the hinges in place per the steps that follow using a high-quality thin C/A glue. T-pin. ! 1) Carefully remove the aileron from one of the wing panels. Note the position of the hinges.
www.seagullmodels.com HINGING THE RUDDER. Glue the rudder hinges in place using the same tectniques used to hinge the ailerons. C/A glue. ! 6) Using C/A remover/debonder and a paper towel, remove any excess C/A glue that may have accumulated on the wing or in the aileron hinge area. ! 7) Repeat this process with the other wing panel, securely hinging the aileron in place. ENGINE MOUNT.
EXTRA 260. Instruction Manual. ! 3) Carefully bend the second nylon tube up at a 45º angle. This tube is the vent tube. Balsa wood. ! 5) With the stopper assembly in place, the weighted pick-up 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.
www.seagullmodels.com Vent tube. Left side. Elevator servo. Fuel pick-up tube. Fuel fill 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. INSTALLING THE FUSELAGE SERVO. Engine .91 - 2 stroke. ELEVATOR SERVO INSTALLATION. ! 1) Locate and cut out the covering film from the servo holes in both sides of fuselage. Throttle servo. Rudder servo. Remove covering.
EXTRA 260. Instruction Manual. Switch. INSTALLING THE AILERON SERVOS. Small weight. Rudder servo. Servos. Throttle servo. Thread. We recommended to use long servos arm ( 70mm diameter) for all servos without throttle servo. Install the rubber grommets and brass collets onto the aileron servo. Test fit the servo into the aileron servo mount. INSTALLING THE SWITCH. Install the switch into the precut hole in the side, in the fuselage.
www.seagullmodels.com Attach the string to the servo lead and carefully thread it though the wing. Once you have thread the lead throught the wing, remove the string so it can use for the other servo lead. Tape the servo lead to the wing to prevent it from falling back into the wing. Wing panel bottom. Pu ll. Thread. Electric wire. Electric wire. Thread. Plastic tape. Aileron electric. Repeat the procedure for orther wing haft. HORIZONTAL STABILIZER.
EXTRA 260. Instruction Manual. and realign. Double check all of your measurements once more before the epoxy cures. Hold the stabilizer in place with T-pins or masking tape and remove any excess epoxy using a paper towel and rubbing alcohol. ! 4) With the stabilizer held firmly in place, use a pen and draw lines onto the stabilizer where it and the fuselage sides meet. Do this on both the right and left sides and top and bottom of the stabilizer. Pen.
www.seagullmodels.com ! 1) Using a modeling knife, remove the covering from over the precut hinge slot cut into the lower rear portion of the fuselage. This slot accepts the lower rudder hinge. ! 4) Remove the stabilizer. Using a modeling knife, remove the covering from below the lines you drew. Also remove the covering from the bottom edge of the stabilizer and the bottom and top edges of the filler block. Leave the covering in place on the sides of the filler block. Hinge slot.
EXTRA 260. Instruction Manual. Wing bottom. M3 lock nut. M3 control horn. M3 nut. C/A glue. Aluminium washer. Aileron control horn. Wing bottom. Repeat the procedure for orther wing. ELEVATOR CONTROL HORN INSTALLATION. INSTALLING THE AILERON LINKAGE. 3x45mm. ! 1) Elevator control horn: Mix a small amount of 30 minute epoxy and lightly coat the inside of the hole in the elevator and the control horn screw. Horizontal fin. Elevator.
www.seagullmodels.com Repeat the procedure for orther elevator. RUDDER CONTROL HORN INSTALLATION. ! 1) Position the rudder control horn on the left - right side of the rudder. ! 2) Locate the two nylon control horns, two nylon control horn backplates and three machine screws. 3x30mm. AILERON PUSHROD INSTALLATION. Aileron pushrods assembly follow pictures below. 2x30mm. Pushrod. 55mm. Rudder control horn. ! 3) Position the rudder horn on the both side of rudder.
EXTRA 260. Instruction Manual. ! 1) Insert servo arm into servo. Repeat the procedure for orther aileron. ELEVATOR PUSHROD INSTALLATION. Repeat the procedure for elevator pushrod as same as aileron pushrod. ! 2) With the radio on, check the operation of the rudder. Adjust the cables so when the rudder servo is centered, the rudder is centered as well. There will be tension on the cables. Adjustments can be made at the rudder control horn and at the servo arm.
www.seagullmodels.com 7mm. 14mm. WHEEL AND WHEEL PANTS. ! 3) You have to trim each axles and using a tool cutting and cut-off wheel. Caution when cutting the axles wear protective goggles. ! 1) Assemble and mounting the wheel pants as shown in the following pictures. 57mm. ! 2) Follow diagram below for wheel pant installation: Plywood Washer. Wheel Collar. Axle. Nut. Nut. Wheel. Landing Gear. Plywood Washer. Wheel Pant.
EXTRA 260. Instruction Manual. INSTALLING THE MAIN LANDING GEAR. !1) The blind nuts for securing the landing gear are already mounted inside the fuselage. !2) Using the hardware provided, mount the main landing gear to the fuselage. 6 X 20mm. lite-plywood block. MOUNTING THE ENGINE. ! 1) Install the pushrod housing through the predrilled hole in the firewall and into the servo compartment. The pushrod housing should protrude 1/4" out past the front of the firewall. Landing gear.
www.seagullmodels.com Engine 1.25 - 4 stroke. 4.2mm. 140mm. ! 5) Bolt the engine to the engine mount using the four machine screws. Double check that all the screws are tight before proceeding. ! 6) 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 car- buretor to be able to attach the Z-bend. When complete, re-attach the throttle arm to the carburetor. 4x30mm. Engine .91 - 2 stroke. Pushrod wire. 4x30mm. COWLING.
EXTRA 260. Trim and cut. Instruction Manual. 1.5mm wire (needle valve). Because of the size 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. ! 2) While keeping the back edge of the cowl flush with the marks, align the front of the cowl with the crankshaft of the engine.
www.seagullmodels.com 3.2mm drill bit. Turnbuckle. Horizontal stabilizer. M3 lock nut. INSTALLING TAIL STRUT SYSTEM. Tail strut system assembly follow pictures below. 14cm. 8cm. 0cm. 3x10mm.
EXTRA 260. Instruction Manual. ! 1) You have to trim each axles and using a tool cutting and cut-off wheel. Aluminium strap. Caution when cutting the axles wear protective goggles. 3x10mm. 1 1 2 2 1 1 (1+2) Plastic clip. 1 3x25mm. 2 ! 2) Set the tail wheel assembly in place. The pivot point of the tail wheel wire should be even with the rudder hinge line and the tail wheel bracket should be on the plywood plate. MOUNTING THE TAIL WHEEL. 33mm.
www.seagullmodels.com Throttle. ! 4) Secure the tail wheel bracket in place using two 3x25mm wood screws. Be careful not to overtighten the screws. INSTALLING THE RECEIVER. ! 1) Plug the six 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.
EXTRA 260. Instruction Manual. Antenna. Wing bolts. BALANCING. ATTACHMENT WING-FUSELAGE. Attach the aluminium tube into fuselage. Insert two wing panels as pictures below: !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 locate 7-8cm back from the leading edge of the wing, measured at wing tip. !2) If the nose of the plane falls, the plane is nose heavy.
www.seagullmodels.com INITIAL FLYING/SPORT FLYING Ailerons: Elevator: Rudder: 5/8” up 1/2” down 3/4” up 3/4” down 2 1/2” right and left AEROBATIC FLYING Ailerons: Elevator: Rudder: 1” up 7/8” down 1 1/4” up 1 1/4”down 3 1/2” right and left Do not use the aerobatic settings for initial test flying or sport flying. ! 4) By moving the position of the adjustable control horn out from the control surface, you will decrease the amount of throw of that control surface.
