MS:128 ASSEMBLY MANUAL “Graphics and specifications may change without notice”. Specifications: Wing span ----------------------------65.4in (166cm). Wing area -----------------767.3sq.in (49.5sq dm). Weight ----------------------9.3-10.6lbs (4.2-4.8kg). Length ------------------------------55.8in (141.8cm). Engine ------------------ 0.91-1.2cu.in ----2-stroke. 1.00-1.25cu.in ----4-stroke. Radio -----------4 channels with 5 digital servos.
MXS-R. Instruction Manual. INTRODUCTION. Thank you for choosing the MXS-R ARTF by SEAGULL MODELS. The MXS-R 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 KIT CONTENTS. 1 2 3 4 5 6 7 8 9 10 11 12 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.
MXS-R. Instruction Manual. 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 ELEVATOR. Glue the elevator hinges in place using the same techniques used to hinge the ailerons. 6mm. HINGING THE RUDDER. Glue the rudder hinges in place using the same techniques used to hinge the ailerons. 6mm. 3) Place epoxy into hole. This will harden the threads and prevent the crews from pulling loose. 4) Thread a control horn end with aluminum washer, lock nut until the top edge of the end is 9mm from the vase of the horn as shown. Hinge. C/A glue.
MXS-R. Instruction Manual. Aileron control horn. INSTALL ELEVATOR CONTROL HORN. Install the elevator control horn using the same method as same as the aileron control horns. 3x35mm. 2 sets. Elevator control horn. INSTALL RUDDER CONTROL HORN. 6mm. Repeat steps to install the rudder control horn as same as steps done for ailerons. 3x35mm. 6mm. 6 1 sets.
www.seagullmodels.com Rudder control horn. 6mm. ENGINE MOUNT INSTALLATION. 1) Locate the items necessary to install the engine mount included with your model. . 6mm. M4x30mm. 2) Use four M4x30mm 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. + 0.91: 2 STROKE. Blink nut.
MXS-R. Instruction Manual. Thread locker glue. Epoxy. + 1.20 : 2 STROKE + 4 STROKE. Epoxy. Basa. Basa. Blink nut. Epoxy.
www.seagullmodels.com Thread locker glue. Epoxy. INSTALLING THE BATTERY. Battery. Epoxy. Basa. Battery. Basa. Epoxy. Tie Wrap.
MXS-R. Instruction Manual. INSTALLING THE STOPPER ASSEMBLY. 3) Carefully bend the second nylon tube up at a 45º angle. This tube is the vent tube. 1) Using a modeling knife, carefully cut off the rear portion of one of the 3 nylon tubes leaving 1/2” protruding from the rear of the stopper. This will be the fuel pick up tube. 4) Test fit the stopper assembly into the tank. It may be necessary to remove some of the flashing around the tank opening using a modeling knife.
www.seagullmodels.com Balsa wood not included. WHEEL AND WHEEL PANTS INSTALLATION. 1) Locate the items neccessary to install the wheel and wheel pants as shown. B Fuel tank. C/A glue. Vent tube. 2) Follow diagram below for wheel pant installation: Fuel pick up tube. Fuel fill tube. Use a drill and 8mm drill bit to drill a hole in the wheel pants. Drill a hole. 9) Connect the lines from the tank to the engine and muffler.
MXS-R. Instruction Manual. 6) Slide the threaded end of the axle through the hole in the bottom of the landing gear leg. Use a washer and locknut to tighten the axle to the landing gear. Make sure to use threadlock on the nut so it won’t vibrate loose in flight as shown. 7) Tighten the setcrews using a hex wrench to secure the collars on the axle over the flat spot to retain the wheel as shown. Cut. Cut. Repeat steps as above to attach remaining wheel pants to the landing gear.
www.seagullmodels.com INSTALLING THE MAIN LANDING GEAR TO FUSELAGE. 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. Set the landing gear in place and use a screwdrive to secure the landing gear to the fuselage using bolts M4x20mm and washers. Make sure to use the threadlock on the bolts so they don’t vibrate loose. Cut.
MXS-R. Instruction Manual. C/A glue. M4x20mm. 14 C/A glue.
www.seagullmodels.com INSTALLING THE FUSELAGE SERVOS. Rudder servo . Elevator servo . 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. 1) Install the rubber grommets and brass collets onto the throttle servo. Test fit the servo into the aileron servo mount. 2) Secure the servos with the screws provided with your radio system. Throttle servo arm. INSTALLING THE SWITCH.
MXS-R. Instruction Manual. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). 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. 150mm. 2) Use a pin drill and 4mm drill bit to drill a small indentation in the mount for the engine mounting screw.
www.seagullmodels.com 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. 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.
MXS-R. Instruction Manual. MOUNTING THE ENGINE. + ENGENE 1.20 : 2 STROKE. 1) Position the engine with the drive washer (150mm) forward of the firewall as shown. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). 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. 150mm.
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. Trim and cut. 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.
MXS-R. Instruction Manual. 3) Use a drill to drill the four holes in the engine mount rails. 4.5mm. 3) Install the muffler and muffler extension onto the engine and make the cutout in the cowl for muffler clearance. Connect the fuel and pressure lines to the carburetor, muffler and fuel filler valve. Secure the cowl to fuselage using the 3x10mm screws. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). MOUNTING THE ENGINE. + ENGENE 1.20 : 4 STROKE.
www.seagullmodels.com Pushrod wire. Machine screw M4x30mm. 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. Trim and cut. 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. COWLING.
MXS-R. Instruction Manual. 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. The front of the cowl should be positioned so the crankshaft is in nearly the middle of the cowl opening. Use the spinner backplate as a guide. Hold the cowl firmly in place using pieces of masking tape. ELECTRIC POWER CONVERSION. 1) Locate the items neccessary to install the electric power conversion included with your model. Needle valve.
www.seagullmodels.com Epoxy. 3mm. 3) Attach the motor to the front of the electric motor box using four 3mm blind nut, four M3x15mm hex head bolts to secure the motor. Please see picture shown. M3x15mm. 4.2mm. Epoxy. 4.2mm. 215mm. Epoxy. Blink nut. Balsa block.
MXS-R. Instruction Manual. Balsa block. INSTALLING THE SPINNER. Install the spinner backplate, propeller and spinner cone. Blink nut. 4) Locate the plywood battery tray to the fuselage. Tighten the screws using machine screws M3x15mm to secure the tray in position. Battery. The propeller should not touch any part of the spinner cone. If it does, use a sharp modeling knife and carefully trim away the spinner cone where the propeller comes in contact with it. INSTALLING THE AILERON - FLAP SERVOS.
www.seagullmodels.com Small weight. String. 2) Place the servo between the mounting blocks and space it from the hatch. Use a pencil to mark the mounting hole locations on the blocks. 3) Use drill bit in a pin vise to drill the mouting holes in the blocks. 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.
MXS-R. Instruction Manual. AILERON PUSHROD HORN INSTALLATION 85mm. M3 clevis. M3 lock nut. 115mm. Wing. M2 lock nut. Aileron.
www.seagullmodels.com Repeat the procedure for the other aileron servo. INSTALLING 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. Draw center line. 4) Install the stabilizer onto the fuselage.
MXS-R. Instruction Manual. 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. 8) Using a modeling knife, carefully remove the covering that overlaps the stabilizer mounting platform sides in the fuselage. Remove the covering from both the top and the bottom of the platform sides. 9) When you are sure that everything is aligned correctly, mix up a generous amount of 30 Minute Epoxy.
www.seagullmodels.com 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. 2) 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.
MXS-R. Instruction Manual. Epoxy. Masking tape. 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. Set the stabilizer in place and realign. Double check all of your measurements once more before the epoxy cures.
www.seagullmodels.com 3) Thread one clevis and M2 lock nut on to each elevator control rod. Thread the horns on until they are flush with the ends of the control rods. Pen. 4) Elevator and rudder pushrods assembly as pictures below. 495mm. Cut. Control horn. Elevator pushrod. 8mm. Metal clevis. M2 lock nut. Wire keeper. 8mm. 8mm. RUDDER PUSHROD HORN INSTALLATION. M2 lock nut . M2 clevis. 8mm.
MXS-R. Instruction Manual. Elevator pushrod. A. Control horn. M2 lock nut. Metal clevis. Rudder pushrod. Elevator pushrod. A. Pen. C/A glue. Cut. Rudder pushrod. Elevator pushrod. A. 8mm. C/A glue. Wire keeper. Elevator control horn. Rudder control horn.
www.seagullmodels.com 1) Elevator and rudder pushrods assembly follow pictures below. 1. 2. 2. 1. 2) Install servos arm to servos. Notice the position of the servo arms on the servos. See picture below. Rudder. M3x25mm. M3x30mm. Elevator. Throttle. M3x25 mm. Rudder. MOUNTING THE TAIL WHEEL. Locate items necessary to install tail wheel. 22mm. M3x30 mm.
MXS-R. Instruction Manual. 2) A scale pilot is included with this ARF. The Seagull Pilot included fitting well to the cockpit. (or you can order others scale pilot figures made by Seagull factory. They are available at Seagull distributors.) M3x30 mm. If you are going to install a pilot figure, please use a sanding bar to sand the base of the figure so that it is flat. 3) Position the pilot figure on the canopy floor as show. Locate the oval shaped on the canopy floor and remove the covering.
www.seagullmodels.com 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. APPLY THE DECALS. 1) If all the decals are precut and ready to stick. Please be certain the model is clean and free from oily fingerprints and dust.
MXS-R. Instruction Manual. ATTACHMENT WING-FUSELAGE. BALANCING. Attach the aluminium tube into fuselage. 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 100 MM BACK FROM THE LEADING EDGE OF THE WING AT THE WING ROOT. Wing tube. Insert two wing panels as pictures below. 2) Mount the wing to the fuselage.
www.seagullmodels.com CONTROL THROWS. FLIGHT PREPARATION. Check the operation and direction of the elevator, rudder, ailerons and throttle. A) Plug in your radio system per the manufacturer's instructions and turn everything on. B) Check the elevator first. Pull back on the elevator stick. The elevator halves should move up. If it they do not, flip the servo reversing switch on your transmitter to change the direction. Ailerons: 15mm up 20mm down. Elevator: 15mm up. 20mm down. Rudder: 25mm left.
MXS-R. Instruction Manual. 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 MXS-R 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.
