www.seagullmodels.com MS: SEA 118 ASSEMBLY MANUAL “Graphics and specifications may change without notice”. Specifications: Wing span ----------------------------- 67.7in (172cm). Wing area ------------------ 779.7sq.in (50.3sq dm). Weight ------------------------- 8.6-9.7lbs (3.9-4.4kg). Length -------------------------------- 49.1in (124.6cm). Engine ----------------.75 - .91cu.in ---------2-stroke. .91 - 1.00cu.in ------4-stroke. Radio -------------- 6 channels with 5 digital servos.
Instruction Manual ZLIN 50. INTRODUCTION. Thank you for choosing the ZLIN 50 ARTF by SEAGULL MODELS. The ZLIN 50 was designed with the intermediate/advanced sport scale 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 KIT CONTEN.TS 1 2 3 4 5 6 7 8 8.1 8.2 9 10 11 12 13 Fuselage Canopy Left wing panel Right wing panel Tail set Aluminum wing tube Scale pilot 70mm wheels (2) Tail wheel gear Main landing gear Wheel pants (2) Decal sheet EP conversion pack Hardware bag included Fiberglass cowl 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.
Instruction Manual ZLIN 50. T- pin. Hinge. 4)Deflect the aileron and completely saturate each hinge with thin C/A glue. The ailerons front surface should lightly contact the wing during this procedure. Ideally, when the hinges are glued in place, a 1/64” gap or less will be maintained throughout the lengh of the aileron to the wing panel hinge line.
www.seagullmodels.com HINGING THE RUDDER. Glue the rudder hinges in place using the same techniques used to hinge the ailerons. 4) Thread a control horn end with aluminum washer, lock nut until the top edge of the end is 18mm from the vase of the horn as shown. CONTROL HORN M3 SCREW. Epoxy. ALUMINUM WASHER. M3 LOCK NUT. ALUMINUM WASHER. Hinge. INSTALL THE AILERONS CONTROL HORN. 1) Locate the hardware necessary to install the control horns for the ailerons. 18mm . Epoxy. 2 sets.
Instruction Manual ZLIN 50. INSTALL RUDDER CONTROL HORN. Repeat steps to install the rudder control horn as same as steps done for ailerons. 2 sets. 3mm. 3x50mm. CONTROL HORN M3 Aluminum Washer. Epoxy. Horizontal Stabilizer. Elevator. Aluminum Washer. M3 LOCK NUT. 3mm. Epoxy. Horizontal Stabilizer. CONTROL HORN . M3 SCREW ALUMINUM WASHER. 16mm. EPOXY. FUSELAGE Rudder ALUMINUM WASHER. M3 LOCK NUT. Elevator control horn. EPOXY. Fuselage. 18mm. 6 Rudder.
www.seagullmodels.com Rudder control horn. INSTALLING THE BATTERY. ENGINE MOUNT INSTALLATION. 1) Locate the items necessary to install the engine mount included with your model. . Battery. Tie Wrap. M4 x 30mm. 2) Use four 4x30mm head bolts and four 4mm washers to attach the engine mount rails to the firewall. Tighten the screws . Make sure to use threadlock on the screws to help prevent them from vibrating loose. INSTALLING THE STOPPER ASSEMBLY.
Instruction Manual ZLIN 50. FUEL TANK INSTALLATION. You should mark which tube is the vent and which is the fuel pickup when you attach fuel tubing to the tubes in the stopper. Once the tank is installed inside the fuselage, it may be difficult to determine which is which. 7) Slide the fuel tank into the fuselage. Guide the lines from the tank through the hole in the firewall. Vent tube. Fuel pick up tube. Fuel fill tube. C/A glue. A.
www.seagullmodels.com 2) Follow diagram below for wheel pant installation: Vent tube. Use a drill and 4.2mm drill bit to drill a hole in the wheel pants. Drill a hole. Fuel fill tube. 4.2mm. 10mm. Fuel pick-up tube. 9) Connect the lines from the tank to the engine and muffler. The vent line will connect to the muffler and the line from the clunk to the carburetor. Blow through one of the lines to ensure the fuel lines have not become kinked inside the fuel tank compartment.
Instruction Manual ZLIN 50. 4) Slide the collar to the axle and setscrew the collars to secure the collar to the axle and then slider the wheel on the axle with a drop of oil on the axle so the wheel will spin freely when installed. Prepare a second collar and tighten the setscrew using hex wrench to secure the collar to the axle. Landing Gear. wheel Pant. C/A glue. 5) Place the wheel assembly in the wheel pants. The threaded portion of the axle will fit the notch of the wheel pant as shown.
www.seagullmodels.com Repeat steps as above to attach remaining wheel pants to the landing gear. INSTALLING THE MAIN LANDING GEAR TO FUSELAGE. THROTTLE SERVO ARM INSTALLATION. Install adjustable servo connector in the servo arm as same as picture below: Loctite secure. 8) The blind nuts for securing the landing gear are already mounted inside the fuselage. 9) Using the hardware provided, mount the main landing gear to the fuselage. 10) Place the fuselage inverted on the workbench in a suitable stand.
Instruction Manual ZLIN 50. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). Switch. MOUNTING THE ENGINE. 1) Position the engine with the drive washer (140mm) forward of the firewall as shown. 5) Slide the pushrod tube in the firewall and guide it through the fuel tank mount. Use medium C/A to glue the tube to the firewall and the fuel tank mount. 6) Connect the Z-bend in the 450mm throttle pushrod to the outer hole of the carburetor arm. 140mm.
www.seagullmodels.com 8) Reinstall the servo horn by sliding the connector over the pushrod wire. Center the throttle stick and trim and install the servo horn perpendicular to the servo center line. 9) Move the throttle stick to the closed position and move the carburetor to closed. Use a 2.5mm hex wrench to tighten the screw that secures the throttle pushrod wire. Make sure to use threadlock on the screw so it does not vibrate loose. Trim and cut.
Instruction Manual ZLIN 50. Needle valve. 2) Attach the electric motor box to the firewall suitable with the cross lines drawn on the electric motor box and firewall. Using epoxy and balsa stick to secure the motor box to the firewall. Please see pictures below. Epoxy. ELECTRIC POWER CONVERSION. 1) Locate the items neccessary to install the electric power conversion included with your model. Epoxy. - Model size: .75-.
www.seagullmodels.com 3) Attach the motor to the front of the electric motor box using four 4mm blind nut, four M4x15mm hex head bolts to secure the motor. Please see picture shown. Blind nut. Balsa block. M4x15mm. 5.2mm. Epoxy. 4) Locate the plywood battery tray to the fuselage. Tighten the screws using machine screws M3x15mm to secure the tray in position. Battery. 140mm. Epoxy. M3x15mm. 5.2mm.
Instruction Manual ZLIN 50. 5) Attach the speed control to the side of the motor box using two-sided tape and tie wraps. Connect the appropriate leads from the speed control to the motor. Make sure the leads will not interfere with the operation of the motor. INSTALLING THE AILERON. Servos. Small weight. speed control. Thread. Because the size of servos differ, you may need to adjust the size of the precut opening in the mount. The notch in the sides of the mount allow the servo lead to pass through.
www.seagullmodels.com 4) Apply 2-3 drops of thin C/A to each of the mounting holes. Allow the C/A to cure without using accelerator. 5) Use dental floss to secure the connection so they cannot become unplugged. 6) Secure the servo to the aileron hatch using Phillips screwdriver and the screws provided with the servo. 7) Apply 1-2 drops of thin C/A to each of the mounting tabs. Allow the C/A to cure without using accelerator.
Instruction Manual ZLIN 50. 1) Mark the control wire where it crosses the servo arm hole. Bend at the mark. 2) Make a 90-degree bend at the mark and cut off the excess wire leaving 8mm past the bend. 9) Set the aileron hatch in place and use a Phillips screw driver to install it with four wood screws. M2 lock nut. Metal clevis. 8mm Snap keeper. Servo arm. Snap keeper. AILERON PUSHROD HORN INSTALLATION 3) Connect the linkage as shown and secure the control wire with a snap keeper. Wing. Mark.
www.seagullmodels.com Repeat the procedure for the other aileron servo. WING ASSEMBLY. 1) Locate the items necessary to attach the wing. 1. 2. 3. 2) Slide the aluminum wing tube into one of the wing panels. Only slide the tube in as far as it will easily slide. Forcing the tube could possibly damage the wing. 4) To help strengthen the wing tube, use machine screw M3x2.5mm to secure and lock the wing tube at end of wing tube as position already marked and predrilled, please see below pictures. 1.
Instruction Manual ZLIN 50. Screw. 2. M3x2.5mm. C/A glue. 2. M3x2.5mm. INSTALLING THE HORIZONTAL STABILIZER. 5) Attach the wood washers in place with C/A glue. 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. Center line. C/A glue. 3.
www.seagullmodels.com 3) Put the stabilizer into place in the position of the fuselage. 4) Install the stabilizer onto the fuselage. Align the centerline drawn on the top and the rear of the stabilizer with the centre of the fuselage. When that is aligned, hold the stabilizer in that position using T-pins or masking tape. Align the horizontal stabilizer with the wing. When viewed from the rear, the horizontal stabilizer should be level with the wing.
Instruction Manual ZLIN 50. Fill epoxy. 10) After the epoxy has fully cured, remove the masking tape or T-pins used to hold the stabilizer in place. Carefully inspect the glue joints. Use more epoxy to fill in any gaps that may exist that were not filled previously and clean up the excess using a paper towel and rubbing alcohol. INSTALLING THE VERTICAL STABILIZER.
www.seagullmodels.com ELEVATOR - RUDDER PUSHROD HORN INSTALLATION. 1) Install tail struts included with your ARF. Cut small slot from the two indentations on the bottom of the horizontal tail. Epoxy. 4) 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 and to bottom of the vertical stabilizer mounting area. Apply epoxy to the bottom and top edges of the filler block and to the lower hinge also.
Instruction Manual ZLIN 50. 3) Attach the tail struts to the both horizontal tail and fuselage with C/A glue. Please see below pictures for easy installation the tail struts. 4) Install the elevator control horn using the same method as with the aileron control horns. 5) Position the elevator control horn on the both side of elevator. Elevator control horn. Rudder control horn. C/A glue. 6) Thread one clevis and M2 lock nut on to each elevator control rod.
www.seagullmodels.com Elevator pushrod. Control horn. M2 lock nut. Metal clevis. Rudder control horn. Elevator control horn. Rudder pushrod. Control horn. 8) With both the rudder servo and rudder centered, mark the rudder pushrod at the hole it crosses in the rudder servo arm using a felttipped pen. A. A. C/A glue. 9) Enlarge the outer hole in the rudder servo arm using a drill bit. Bend the pushrod wire at the mark made in the last step.
Instruction Manual ZLIN 50. M2 lock nut . 8mm. M2 clevis. 10) Elevator and rudder pushrods assembly follow pictures below. 2. 1. 2. 1. 11) Install servos arm to servos. Notice the position of the servo arms on the servos. See picture below. Throttle. MOUNTING THE TAIL WHEEL. Locate items necessary to install tail gear. 1. M3 x 12mm. Elevator. 2. Rudder.
www.seagullmodels.com Rudder pushrod. Cut. 1. Elevator pushrod. 1) Set the tail wheel assembly in place on the plywood plate. The pivot point of the tail wheel wire should be even with the rudder hinge line and the tail wheel bracket should be centered on the plywood plate. 2. INSTALLTION PILOT AND CANOPY. 1) Locate items necessary to install pilot, cockpit panel, and canopy. 2) Using a pen, mark the locations of the two mounting screws.
Instruction Manual ZLIN 50. 4) Position the canopy onto the fuselage. Trace around the canopy and onto the fuselage using a felt-tipped pen. - Apply a bead of canopy glue around the inside edge of the canopy. Position the canopy onto the hatch. Use tape to hold the canopy secure until the glue fully cures. INSTALLING THE BATTERY-RECEIVER. 1) Plug the five servo leads and the switch lead into the receiver. Plug the battery pack lead into the switch also.
www.seagullmodels.com BALANCING. Tighten the antenna. 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 95 MM BACK FROM THE LEADING EDGE OF THE WING AT THE WING ROOT. 2) Mount the wing to the fuselage. Using a couple of pieces of masking tape, place them on the top side of the wing 95 mm back from the leading edge of the wing at the wing root. ATTACHMENT WING TO FUSELAGE.
Instruction Manual ZLIN 50. CONTROL THROWS. Ailerons: 12mm - 15mm up. 12mm - 15mm down. Elevator: 10mm - 12mm up. 10mm - 12mm down. Rudder: 20mm - 30mm left. 20mm - 30mm right. 95 mm. FLIGHT PREPARATION. A) Check the operation and direction of the elevator, rudder, ailerons and throttle. B) Plug in your radio system per the manufacturer's instructions and turn everything on. C) Check the elevator first. Pull back on the elevator stick. The elevator halves should move up.
www.seagullmodels.com PREFLIGHT CHECK. 1) Completely charge your transmitter and receiver batteries before your first day of flying. 2) Check every bolt and every glue joint in the ZLIN 50 to ensure that everything is tight and well bonded. 3) Double check the balance of the airplane. Do this with the fuel tank empty. 4) Check the control surfaces. All should move in the correct direction and not bind in any way.
