www.seagullmodels.com 68-6412-32462 ASSEMBLY MANUAL MS:146 Specifications: “Cessna, 337 Skymaster, emblems, logos, and body designs are trademarks of Textron Innovations Inc. and are used under license by Seagull Models Manufacturing and Trading Company LTD.” “Graphics and specifications may change without notice”. Wing span -------------------------76.8in (195.0cm) Wing area --------------806.0sq.in (52.0sq dm) Weight -----------------------------9.9-11.0lbs(4.5-5.
CESSNA 337 SKYMASTER Instruction Manual. INTRODUCTION. Thank you for choosing the CESSNA 337 SKYMASTER ARTF by SEAGULL MODELS COMPANY LTD. The CESSNA 337 SKYMASTER 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.
www.seagullmodels.com KIT CONTENTS. 1 2 2A 3 4 5 Fuselage Wing Set Center Wing Tail Set Cowlings Aluminum Wing Tube HINGING THE FLAP . 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. 1) Carefully remove the flap from one of the wing panels. Note the position of the hinges.
CESSNA 337 SKYMASTER Hinge. Instruction Manual. 8) After both flap are securely hinged, firmly grasp the wing panel and flap to make sure the hinges are securely glued and cannot be pulled out. Do this by carefully applying medium pressure, trying to separate the flap from the wing panel. Use caution not to crush the wing structure. 4)Deflect the flap and completely saturate each hinge with thin C/A glue. The ailerons front surface should lightly contact the wing during this procedure.
www.seagullmodels.com T-pin. Hinge. 3) Slide the aileron on the wing panel until there is only a slight gap. The hinge is now centered on the wing panel and aileron. Remove the T-pins and snug the aileron against the wing panel. A gap of 1/64” or less should be maintained between the wing panel and aileron. 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.
CESSNA 337 SKYMASTER 8) After both ailerons are securely hinged, firmly grasp the wing panel and aileron to make sure the hinges are securely glued and cannot be pulled out. Do this by carefully applying medium pressure, trying to separate the aileron from the wing panel. Use caution not to crush the wing structure. Instruction Manual. INSTALL THE AILERONS CONTROL HORN. 1) Locate the hardware necessary to install the control horns for the ailerons. Fiberglass control horn .
www.seagullmodels.com INSTALL FLAP CONTROL HORN. Install the flap control horn using the same method as same as the aileron control horns. INSTALL ELEVATOR CONTROL HORN. Install the elevator control horn using the same method as same as the aileron control horns. Fiberglass control horn . Fiberglass control horn . Epoxy Epoxy Epoxy Elevator control horn Epoxy . INSTALL RUDDER CONTROL HORN. Repeat steps to install the rudder control horn as same as steps done for ailerons. Flap control horn .
CESSNA 337 SKYMASTER Instruction Manual. Epoxy. INSTALLING THE STOPPER ASSEMBLY . Rudder control horn. Epoxy. 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. 2) Using a modeling knife, cut one length of silicon fuel line. Connect one end of the line to the weighted fuel pick up and the other end to the nylon pick up tube.
www.seagullmodels.com FUEL TANK INSTALLATION BEFORE. 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. Fuel tank. Vent tube. Fuel pick up tube. Fuel fill tube. 4) Test fit the stopper assembly into the tank.
CESSNA 337 SKYMASTER Instruction Manual. Fuel tank. vent tube. Fuel pick-up tube. Fuel fill tube. 10) 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. 8) Use plywood template to hold in place the fuel tank with C/A glue to secure the fuel tank inside the fuselage. Fuel tank. Rubber band. balsa wood included.
www.seagullmodels.com 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 SERVOS. Rudder servo. Rudder 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.
CESSNA 337 SKYMASTER Throttle servo arm. Instruction Manual. Trim and cut. Landing gear servo arm. Switch. Rudder servo arm. rudder servo arm. MOUNTING THE ENGINE BEFORE. 1) Position the engine with the drive washer (110mm) forward of the firewall as shown. Elevator servo arm. INSTALLING THE SWITCH. Install the switch into the precut hole in the side, in the fuselage. 105mm. 3/ 32” Hole.
www.seagullmodels.com Pushrod wire. Trim and cut. 2mm Machine screw M3x15mm. 3) Use a drill to drill the four holes in the engine mount rails. M3x15mm. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). Linkage. . Pushrod tube hole. 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.
CESSNA 337 SKYMASTER Instruction Manual. MOUNTING THE ENGINE AFTER. 1) Position the engine with the drive washer (110mm) forward of the firewall as shown. Screw. Pushrod wire. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). 105mm. 2) Use a pin drill and 2mm drill bit to drill a small indentation in the mount for the engine mounting screw. 2mm 3) Use a drill to drill the four holes in the engine mount rails. Pushrod tube hole.
www.seagullmodels.com 3 5 4 1 2 1 4 Linkage. . 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. 2 Screw. 3 2 LANDING GEAR INSTALLATION: A. NOSE GEAR: 1) Locate the items necessary to attach the nose landing gear that are included with your model.
CESSNA 337 SKYMASTER Instruction Manual. 5 1 M2 clevis. 3 2 Screw. . 2) Install landing gear at the top Fuselage. Adjustable connector.
www.seagullmodels.com COWLING BEFORE. 1) Slide the fiberglass cowl over the engine and line up the back edge of the cowl with the marks you made on the fuselage then trim and cut as shown. Drill a hole 5mm. Trim and cut. 5mm. Trim and cut. Trim and cut. 2) Install LED lights at the top Cowling. C/A glue.
CESSNA 337 SKYMASTER 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. 3) 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) 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 BEFORE. Recommendation EP parts as shown (not included with your model) - Model size: .35-.
CESSNA 337 SKYMASTER Instruction Manual. M4x60mm. 4mm Blind nut. M4x60mm.
www.seagullmodels.com M3x15mm. Speed control. ELECTRIC POWER CONVERSION AFTER. Recommendation EP parts as shown (not included with your model) - 4mm. Model size: .35-.45 size models Motor: 35mm 830 rev per volt Propeller: 10x7 ESC: 50A Lipo Batteries: 4 cell 3200mA 4mm.
CESSNA 337 SKYMASTER Instruction Manual. M3x15mm. Battery. M4x60mm.
www.seagullmodels.com Speed control. INSTALLING THE SPINNER BEFORE. Install the spinner backplate, propeller and spinner cone. 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. 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.
CESSNA 337 SKYMASTER Servos. Instruction Manual. Small weight. 4) Apply 2-3 drops of thin C/A to each of the mounting holes. Allow the C/A to cure without using accelerator. 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. 1) Using a small weight (Weighted fuel pick-up works well) and string, feed the string through the wing as indicated. Small weight.
www.seagullmodels.com Small weight. Electric wire. String. 9) Set the aileron hatch in place and use a Phillips screw driver to install it with four wood screws. AILERON PUSHROD HORN INSTALLATION 40mm. M2 clevis. M2 lock nut. 70mm. Small weight. Wing. M2 lock. Aleron.
CESSNA 337 SKYMASTER Instruction Manual. FLAG PUSHROD HORN INSTALLATION 2) Follow diagram below for wheel pant installation: Repeat the procedure for the aileron servo. 4 Wing. 6 M2 lock. 3 2 5 Flag. WHEEL AND WHEEL PANTS. 1) Assemble and mounting the landing gear ,wheels to the wheel pants as shown in the following pictures.
www.seagullmodels.com 1 M4x20mm. 6 INSTALLING THE VERTICAL STABILIZER. 3) A drop of C/A glue on the wheel collar screws will help keep them from coming lose during operation. 1) Using a modeling knife, remove the covering from over the precut hinge slot cut into the lower rear portion of the tail at the fuselage. Repeat the process for the other wheel. INSTALLING THE MAIN LANDING GEAR. 1) The blind nuts for securing the landing gear are already mounted inside the fuselage. Remove covering.
CESSNA 337 SKYMASTER 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. 3) Slide the vertical stabilizer back in place. Using a triangle, check to ensure that the vertical stabilizer is aligned 90º to the horizontal stabilizer. Instruction Manual. INSTALLING THE HORIZONTAL STABILIZER.
www.seagullmodels.com 6) 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. Epoxy. 7) Remove the stabilizer. Using the lines you just drew as a guide, carefully remove the covering from between them using a modeling knife. Epoxy. Remove covering.
CESSNA 337 SKYMASTER C/A glue. Instruction Manual. M2 lock nut. Control horn. Elevator pushrod. Metal clevis. RUDDER PUSHROD HORN INSTALLATION. 690mm. C/A glue. M2 clevis. ELEVATOR PUSHROD HORN INSTALLATION. 1) Install the elevator control horn using the same method as with the aileron control horns. 2) Position the elevator control horn on the both side of elevator. M2 lock nut. 720mm. Rudder control horn. Elevator control horn. Rudder control horn. 690mm. M2 clevis. M2 lock nut. 720mm.
www.seagullmodels.com C/A glue. Rudder Control horn. Metal clevis. M2 lock nut. Rudder pushrod. Cut. Rudder pushrod. Control horn. M2 lock nut. Metal clevis. C/A glue. Rudder Control horn. Rudder pushrod.
CESSNA 337 SKYMASTER Instruction Manual. Rudder pushrod. M2x6mm. Screw. Elevator pushrod. INSTALLATION THE STRUTS. Epoxy. Cut. Wing. Wing.
www.seagullmodels.com Wing. Fuselage. INSTALLATION PILOT. pen. 1) 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.) 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. Fuselage. 1 remove covering. 2 Fuselage. Fuselage.
CESSNA 337 SKYMASTER Instruction Manual. INSTALLING THE BATTERY-RECEIVER. 2 C/A glue. 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) Route the antenna in the antenna tube inside the fuselage and secure it to the bottom of fuselage using a plastic tape. 25mm 3) Position the canopy onto the fuselage.
www.seagullmodels.com 2.5mm. Antenna. M3x25mm.
CESSNA 337 SKYMASTER INSTALLATION WING -FUSELAGE TRUTS. 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 80 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 bottom side of the wing 80 mm back from the leading edge of the wing at the wing root.
www.seagullmodels.com CONTROL THROWS. Ailerons: 10mm - 12mm up. 10mm - 12mm down. Elevator: 10mm - 12mm up. 10mm - 12mm down. 80mm. Rudder: 20mm - 25mm left. 20 mm - 25mm right.
CESSNA 337 SKYMASTER Instruction Manual. FLIGHT PREPARATION. PREFLIGHT CHECK. Check the operation and direction of the elevator, rudder, ailerons and throttle. 1) Completely charge your transmitter and receiver batteries before your first day of flying. 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.
