SG Models SEA 99N Assembly Manual
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SG Models SEA 99N Assembly Manual

Upgrated dewoitine d-520 71” span 20-26cc
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ASSEMBLY MANUAL
Speciications
Wing span-------------------- 70.9 in------------ 180 cm
Wing area-------------------- 764.2 sq.in-------- 49.3sq dm
Weight------------------------ 10.1-11 lbs-------- 4.6-5.0 kg
Length------------------------ 56.8 in------------- 144.2 cm
Engine------------------------ 1.2 cu.in----------- 2-stroke
ELECTRIC CONVERSION : OPTIONAL
Radio------------------------- 7 channels with 8 servos
Code : SEA 99N
1.2-1.25 cu.in ----- 4-stroke
20-26cc
1

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Summary of Contents for SG Models SEA 99N

  • Page 1 Code : SEA 99N ASSEMBLY MANUAL Speciications Wing span-------------------- 70.9 in------------ 180 cm Wing area-------------------- 764.2 sq.in-------- 49.3sq dm Weight------------------------ 10.1-11 lbs-------- 4.6-5.0 kg Length------------------------ 56.8 in------------- 144.2 cm Engine------------------------ 1.2 cu.in----------- 2-stroke 1.2-1.25 cu.in ----- 4-stroke 20-26cc ELECTRIC CONVERSION : OPTIONAL...

  • Page 2: Kit Contents

    ARTF Upgrated Dewoitine D-520 71” span 20-26cc by SG MODELS . he was de- signed with the intermediate/advanced sport lyer in mind. It is a semi scale air- plane which is easy to ly and quick to assemble. he airframe is convention- ally 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

    KIT CONTENTS HINGING THE FLAP Upgrated Dewoitine D-520 SEA99N Note : he control surfaces, including the ailer- ons, elevators, and rudder, are prehinged with 71” span 20-26cc hinges installed, but the hinges are not glued in place. It is imperative that you properly adhere 1.

  • Page 4: Hinging The Aileron

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Repeat this process with the other wing Delect the and completely satu- panel, securely hinging the aileron in rate each hinge with thin C/A glue. he place ailerons front surface should lightly con- tact the wing during this procedure.
  • Page 5 Remove each hinge from the wing panel NOTE : he hinge is constructed of a spe- and aileron and place a T-pin in the center cial material that allows the C/A to wick of each hinge. Slide each hinge into the wing or penetrate and distribute throughout panel until the T-pin is snug against the wing the hinge, securely bonding it to the wood...
  • Page 6 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Repeat this process with the other wing panel, securely hinging the aileron in place Ater both ailerons are securely hinged, irmly grasp the wing panel and aileron to make sure the hinges are securely glued and cannot be pulled out.
  • Page 7 Remove the control horns from the control surfaces. Apply epoxy to the slot in the aileron and lap. Make sure the epoxy gets into the slot for a good bond between the surfaces and control horn. Epoxy INSTALL FLAP CONTROL HORN Install the lap control horn using the same method as same as the aileron con- trol horns.

  • Page 8: Installing The Aileron Servos

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Minimum servo spec. Torque : 80 oz-in (5.8 kg-cm) @ 4.8V; 100 oz-in (7.2 kg-cm) @ 6.0V Epoxy Install the rubber grommets and brass collets onto the aileron servo. Test it the servo into the aileron servo mount.
  • Page 9 Repeat the procedure for the other wing Attach servo lead to the aileron servo. half. Attach the string to the servo lead and carefully thread it though the wing. Once you have thread the lead throught the INSTALLING THE FLAP SERVO wing, remove the string so it can use for the other servo lead.
  • Page 10 Instruction Manual. Upgrated Dewoitine D-520 71” span 20-26cc AILERON PUSHROD INSTALLATION Please study images below. 50mm M3 clevis M3 lock nut 60mm M3 clevis M3 lock nut INSTALLING RETRACTABLE LANDING GEAR Locate items necessary to install Sprin Landing Gear. You use this fork set JP ER-120-84degree. INSTALLING THE FLAP PUSHROD Repeat the procedure for the aileron pushrod.
  • Page 11 M3x20mm M3x10mm...
  • Page 12 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. M3x4mm M3x4mm Collar M3x4mm...

  • Page 13: Wing Assembly

    WING ASSEMBLY Please see below pictures.

  • Page 14: Installing The Fuselage Servos

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Secure the servos with the screws pro- vided with your radio system. Elevator servo Rudder servo Elevator servo hrottle servo THROTTLE SERVO ARM INSTALLATION Install adjustable servo connector in the servo arm as same as picture below: INSTALLING THE FUSELAGE SERVOS Because the size of servos difer, you may need to adjust the size of the precut...

  • Page 15: Installing The Stopper Assembly

    INSTALLING THE RECEIVER SWITCH Install the switch into the precut hole in the side, in the fuselage. 3/32” Hole. Switch INSTALLING THE STOPPER ASSEMBLY Using a modeling knife, carefully cut of the rear portion of one of the 3 nylon tubes leaving 1/2”...

  • Page 16: Fuel Tank Installation

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Slide the fuel tank into the fuselage. Guide Vent tube Fuel pick up tube the lines from the tank through the hole in the iewall. Use plywood template to hold in place the Fuel ill tube fuel tank with C/A glue to secure the fuel- tank inside the fuselage.

  • Page 17: Mounting The Engine

    Use four 4x30mm head bolts and four 4mm washers to attach the engine mount rails to the irewall. Tighten the screws . Make sure to use threadlock on the screws to help prevent them from vibrat- ing loose. Loctite Vent tube Fuel pick up tube Fuel ill tube Connect the lines from the tank to the...
  • Page 18 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Use a pin drill and 4mm drill bit to drill a small indentation in the mount for the engine mounting screw. M4x30mm Pushrod wire Use a drill to drill the four holes in the engine mount rails.
  • Page 19 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. Move the throttle stick to the closed po- sition and move the carburetor to closed. Use a 2.5mm hex wrench to tighten the screw that secures the throttle pushrod wire.
  • Page 20 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. COWLING Please see below pictures. Use a drill and drill bit to drill the holes for the cowl mounting screws. Make sure the cowl position is correct before drill- ing each hole. Install the muler and muler exten- sion onto the engine and make the cutout in the cowl for muler clearance.
  • Page 21 M3x10mm ELECTRIC POWER CONVERSION Locate the items neccessary to install the electric power conversion included with your model. Recommend the items necessary to in- stall the electric power conversion parts included with your model. - Motor: 110 - 2000 Watts - Propeller: 17x8 ~ 19x10 - ESC: 85A - 6S- 8S Lipo...
  • Page 22 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. hen, use 4mm drill bit to enlarge the holes on the electric motor box. M4x25mm and washers Attach the motor mount to the front of the electric motor box using four 4mm blind nut, four M4x25mm hex head bolts to se- cure the motor.
  • Page 23 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. Speed control M4x20mm 145mm...

  • Page 24: Hinging The Rudder

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. HINGING THE RUDDER Glue the top three rudder hinges in place using the same techniques used to hinge the elevator. he lower hinge will be glued when the in/rudder assembly is attached to the fu- selage.

  • Page 25: Installing Vertical Stabilizer

    C/A glue Fill Epoxy INSTALLING VERTICAL STABILIZER Aluminium tube diameter = 12 x 212mm Fill Epoxy 3x70mm...
  • Page 26 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. Epoxy Hinge Rudder iberglass control horn. INSTALL RUDDER CONTROL HORN Repeat steps to install the rudder control horn as same as steps done for elevator. Fiberglass control horn.
  • Page 27 INSTALLING HORIZONTAL FIN Fill Epoxy Vertical Stabilizer. Horizontal 90º Stabilizer. Epoxy...
  • Page 28 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. INSTALL ELEVATOR CONTROL HORN C/A glue...

  • Page 29: Hinging The Elevator

    ELEVATOR PUSHROD HINGING THE ELEVATOR INSTALLATION Install the elevator control horn using the same method as with the aileron con- trol horns. Position the elevator control horn on the both side of elevator. Elevator control horn. hread one clevis and M2 lock nut on to each elevator control rod.

  • Page 30: Rudder Pushrod Installation

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. RUDDER PUSHROD INSTALLATION Repeat steps as same as steps done for elevator. 820mm M2 lock nut M2 clevis 860mm M2 lock nut. M2 clevis.

  • Page 31: Mounting The Tail Wheel

    M3x15mm MOUNTING THE TAIL WHEEL Locate items necessary to install tail wheel. M3x15mm...
  • Page 32 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. INSTALLATION COCKPIT, PILOT AND CANOPY Locate items necessary to install.
  • Page 33 Epoxy Epoxy Epoxy M2x6mm...
  • Page 34 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. INSTALLING THE BATTERY-RECEVER INSTALLING NEEDED ANTEN Plug the servos leads and the switch Parts requirement.See pictures below. lead into the receiver. Plug the battery pack lead into the switch also. Wrap the receiver and battery pack in the protective foam rubber to protect them from vibration.

  • Page 36: Apply The Decals

    Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. 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 ingerprints and dust. Position decal on the model where de- sired, using the photos on the box and aid in their location.

  • Page 37: Control Throws

    Ailerons: Rudder: High Rate : High Rate : Up : 15 mm Right : 20 mm Down : 15 mm Let : 20 mm Low Rate : Low Rate : Up : 10 mm Right : 15 mm Let : 15 mm Down : 10 mm Elevator: Flap:...
  • Page 38 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. 10-15mm 10-15mm 15-20mm Fuselage 15-20mm 10-15mm Wing 10-15mm 30mm...

  • Page 39: Flight Preparation

    FLIGHT PREPARATION. PREFLIGHT CHECK. Check the operation and direction of the 1) Completely charge your transmit- elevator, rudder, ailerons and throttle. ter and receiver batteries before your irst day of lying. A) Plug in your radio system per the 2) Check every bolt and every glue joint manufacturer’s instructions and turn eve- Upgrated Dewoitine D-520 71”...
  • Page 40 Upgrated Dewoitine D-520 71” span 20-26cc Instruction Manual. If you have any queries, or are interested in our products, please feel free to contact us Factory : 12/101A - Hamlet 4 - Le Van Khuong Street - Dong hanh Ward - Hoc Mon District - Ho Chi Minh City - Viet Nam.

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