Cessna , 337 Skymaster Assembly Manual
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Cessna , 337 Skymaster Assembly Manual

Cessna , 337 Skymaster Assembly Manual

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"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".
www.seagullmodels.com
ASSEMBLY MANUAL
Specifications:
Wing span -------------------------76.8in (195.0cm)
Wing area --------------806.0sq.in (52.0sq dm)
Weight -----------------------------9.9-11.0lbs(4.5-5.0kg)
Length ---------------------------57.1in (145.0cm)
Engine -------------0.36 - 0.46 cu.in -----2-stroke.
0.52 - 0.72cu.in -----4-stroke.
Radio ----------------- 6 channels with 10 servos.
Electric conversion :optional..
68-6412-32462
MS:146
1

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Summary of Contents for Cessna Cessna, 337 Skymaster

  • Page 1 Wing area --------------806.0sq.in (52.0sq dm) Weight -----------------------------9.9-11.0lbs(4.5-5.0kg) Length ---------------------------57.1in (145.0cm) “Cessna, 337 Skymaster, emblems, logos, and body designs Engine -------------0.36 - 0.46 cu.in -----2-stroke. are trademarks of Textron Innovations Inc. and are used under license by Seagull Models Manufacturing and Trading 0.52 - 0.72cu.in -----4-stroke.

  • Page 2: Kit Contents

    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.

  • Page 3: Additional Items Required

    www.seagullmodels.com KIT CONTENTS. HINGING THE FLAP . Fuselage Note: The control surfaces, including the Wing Set ailerons, elevators, and rudder, are Center Wing prehinged with hinges installed, but Tail Set the hinges are not glued in place. It Cowlings is imperative that you properly Aluminum Wing Tube adhere the hinges in place per the steps that follow using a high-quality...

  • Page 4: Hinging The Ailerons

    CESSNA 337 SKYMASTER Instruction Manual. 8) After both flap are securely hinged, firmly grasp the wing panel and flap to make sure Hinge. 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.
  • Page 5 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.

  • Page 6: Hinging The Elevators

    CESSNA 337 SKYMASTER Instruction Manual. 8) After both ailerons are securely hinged, INSTALL THE AILERONS CONTROL firmly grasp the wing panel and aileron to HORN. make sure the hinges are securely glued and cannot be pulled out. Do this by carefully 1) Locate the hardware necessary to install applying medium pressure, trying to separate the control horns for the ailerons.
  • Page 7 www.seagullmodels.com INSTALL ELEVATOR CONTROL HORN. INSTALL FLAP CONTROL HORN. Install the flap control horn using the same Install the elevator control horn using the method as same as the aileron control horns. same method as same as the aileron control horns.

  • Page 8: Installing The Stopper Assembly

    CESSNA 337 SKYMASTER Instruction Manual. Epoxy. INSTALLING THE STOPPER ASSEMBLY . Rudder control horn. 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.
  • Page 9 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.
  • Page 10 CESSNA 337 SKYMASTER Instruction Manual. vent tube. Fuel tank. Fuel pick-up tube. Fuel fill tube. 10) Connect the lines from the tank to the 8) Use plywood template to hold in place the engine and muffler. The vent line will connect fuel tank with C/A glue to secure the fuel tank to the muffler and the line from the clunk to the inside the fuselage.

  • Page 11: Installing The Fuselage Servos

    www.seagullmodels.com Blow through one of the lines to en- sure 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 open- ing in the mount.

  • Page 12: Installing The Switch

    CESSNA 337 SKYMASTER Instruction Manual. Throttle servo arm. 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.
  • Page 13 www.seagullmodels.com Pushrod wire. Trim and cut. 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.
  • Page 14 CESSNA 337 SKYMASTER Instruction Manual. MOUNTING THE ENGINE AFTER. Screw. 1) Position the engine with the drive washer (110mm) forward of the firewall as shown. Pushrod wire. 4) On the fire wall has the location for the throttle pusshrod tube (pre-drill). 105mm.

  • Page 15: Landing Gear Installation

    www.seagullmodels.com 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.
  • Page 16 CESSNA 337 SKYMASTER Instruction Manual. M2 clevis. Screw. 2) Install landing gear at the top Fuselage. Adjustable connector.
  • Page 17 www.seagullmodels.com COWLING BEFORE. 1) Slide the fiberglass cowl over the en- gine 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.
  • Page 18 CESSNA 337 SKYMASTER Instruction Manual. Because of the size of the cowl, it may be nec- COWLING AFTER. essary to use a needle valve extension for the 1) Slide the fiberglass cowl over the en- high speed needle valve. Make this out of suf- gine and line up the back edge of the cowl with ficient length 1.5mm wire and install it into the the marks you made on the fuselage then trim...
  • Page 19 www.seagullmodels.com While keeping the back edge of the ELECTRIC POWER CONVERSION cowl flush with the marks, align the front of BEFORE. the cowl with the crankshaft of the engine. The front of the cowl should be positioned so the Recommendation EP parts as shown (not crankshaft is in nearly the middle of the cowl included with your model) opening.
  • Page 20 CESSNA 337 SKYMASTER Instruction Manual. M4x60mm. Blind nut. M4x60mm.
  • Page 21 www.seagullmodels.com M3x15mm. Speed control. ELECTRIC POWER CONVERSION AFTER. 4mm. Recommendation EP parts as shown (not included with your model) - Model size: .35-.45 size models - Motor: 35mm 830 rev per volt - Propeller: 10x7 - ESC: 50A - Lipo Batteries: 4 cell 3200mA 4mm.
  • Page 22 CESSNA 337 SKYMASTER Instruction Manual. M3x15mm. Battery. M4x60mm.
  • Page 23 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.
  • Page 24 CESSNA 337 SKYMASTER Instruction Manual. 4) Apply 2-3 drops of thin C/A to each of the Servos. Small weight. 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 open- ing in the mount.
  • Page 25 www.seagullmodels.com Small weight. Electric wire. 9) Set the aileron hatch in place and use a Phillips screw driver to install it with four wood String. screws. AILERON PUSHROD HORN INSTALLATION 40mm. M2 clevis. M2 lock nut. 70mm. Wing. Small weight. M2 lock.
  • Page 26 CESSNA 337 SKYMASTER Instruction Manual. 2) Follow diagram below for wheel pant FLAG PUSHROD HORN INSTALLATION installation: Repeat the procedure for the aileron servo. Wing. M2 lock. Flag. WHEEL AND WHEEL PANTS. 1) Assemble and mounting the landing gear ,wheels to the wheel pants as shown in the following pictures.

  • Page 27: Installing The Vertical Stabilizer

    www.seagullmodels.com M4x20mm. 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 fu- selage.

  • Page 28: Installing The Horizontal Stabilizer

    CESSNA 337 SKYMASTER Instruction Manual. While holding the vertical stabilizer INSTALLING THE HORIZONTAL STABILIZER. firmly in place, use a pen and draw a line on each side of the vertical stabilizer where it 1) Using a ruler and a pen, locate the meets the top of the fuselage.
  • Page 29 www.seagullmodels.com 6) With the stabilizer held firmly in place, use a pen and draw lines onto the stabilizer Epoxy. where it and the fuselage sides meet. Do this on both the right and left sides and top and bottom of the stabilizer. 7) Remove the stabilizer.
  • Page 30 CESSNA 337 SKYMASTER Instruction Manual. C/A glue. M2 lock nut. Control horn. Elevator pushrod. Metal clevis. RUDDER PUSHROD HORN INSTALLATION. 690mm. C/A glue. M2 clevis. M2 lock nut. ELEVATOR PUSHROD HORN 720mm. INSTALLATION. 1) Install the elevator control horn using the same method as with the aileron control Rudder control horn.
  • Page 31 www.seagullmodels.com C/A glue. Rudder Control horn. M2 lock nut. Metal clevis. Rudder pushrod. Cut. Control horn. Rudder pushrod. M2 lock nut. Metal clevis. Rudder Control horn. C/A glue. Rudder pushrod.
  • Page 32 CESSNA 337 SKYMASTER Instruction Manual. Rudder pushrod. M2x6mm. Screw. Elevator pushrod. INSTALLATION THE STRUTS. Epoxy. Wing. Cut. Wing.
  • Page 33 www.seagullmodels.com Fuselage. Wing. INSTALLATION PILOT. 1) A scale pilot is included with this ARF. The pen. 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...

  • Page 34: Apply The Decals

    CESSNA 337 SKYMASTER Instruction Manual. 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. C/A glue. 2) Wrap the receiver and battery pack in the protective foam rubber to protect them from vibration.
  • Page 35 www.seagullmodels.com 2.5mm. Antenna. M3x25mm.
  • Page 36 CESSNA 337 SKYMASTER Instruction Manual. INSTALLATION WING -FUSELAGE BALANCING. TRUTS. 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.

  • Page 37: Control Throws

    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.

  • Page 38: Flight Preparation

    CESSNA 337 SKYMASTER Instruction Manual. FLIGHT PREPARATION. PREFLIGHT CHECK. Check the operation and direction of the 1) Completely charge your transmitter elevator, rudder, ailerons and throttle. and receiver batteries before your first day of flying. A) Plug in your radio system per the manufacturer's instructions and turn every- 2) Check every bolt and every glue joint thing on.

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