E-FLITE J-3 Cub 25 ARF Assembly Manual Download Page 28 | Manualshive

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21. Apply a thin coat of 6-minute epoxy to one side

of a wing joiner. Use clamps to hold a second
joiner to the first until the epoxy fully cures.



22. Once the epoxy has had time to cure, sand any

excess epoxy from the joiner. Test fit the joiner
into one wing panel. Sand the joiner if necessary
so the joiner fits properly.

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Summary of Contents for J-3 Cub 25 ARF

Page 1: ...J 3 Cub 25 ARF Assembly Manual...

Page 2: ...rglass floats is also available EFLA500 All it takes is five minutes to change from landing gear to floats to enjoy those afternoons on the lake Change back to the standard landing gear and you can be...

Page 3: ...cement Parts EFL4006 Windshield Window Set EFL4007 Pushrod Set EFL4008 Main Wheels Covering Colors Cub Yellow HANU884 Black HANU874 Contents of Kit Parts Layout Specifications Wingspan 62 in 1575mm Le...

Page 4: ...60E Electric Propeller 12 x 6E THP42003S2PPL 4200 3S2P 11 1V Li Po 13 GA EFLC3005 Celectra 1 3 Cell Li Po Charger Or EFLB4010 1800mAh Ni MH 10 Cell Required Tools and Adhesives Tools Small Phillips Sc...

Page 5: ...pect the fuselage wing panels rudder and stabilizer for damage If you find any damaged or missing parts contact the place of purchase Note on Lithium Polymer Batteries Lithium Polymer batteries are si...

Page 6: ...injury Limited Warranty Limits of Liability Pursuant to this Limited Warranty Horizon Hobby Inc will at its option i repair or ii replace any product determined by Horizon Hobby Inc to be defective In...

Page 7: ...shipping carton Please note that original boxes may be included but are not designed to withstand the rigors of shipping without additional protection Ship via a carrier that provides tracking and ins...

Page 8: ...e retail purchase cost you will be provided with an estimate advising you of your options You will be billed for any return freight for non warranty repairs Please advise us of your preferred method o...

Page 9: ...nding gear straps and eight 2mm x 10mm sheet metal screws 2 Slide the inner wheel hub onto the landing gear The holes in the inner hub do not go through the hub Slide a 4mm wheel collar onto the landi...

Page 10: ...Press the 2 1 2 63mm foam wheel onto the inner hub Press the outer wheel hub into the wheel Complete the assembly using four 2mm x 15mm sheet metal screws 4 Press the hub cap into the outer wheel hub...

Page 11: ...5 Attach the landing gear fairing to the landing gear using three tie straps Trim the excess strap side cutters 6 Repeat Steps 2 through 5 to complete the landing gear installation 11...

Page 12: ...and loop straps 2 6 32 x 1 2 socket head screw 4 2mm x 10mm sheet metal screw 4 Propeller adapter 12 x 6 electric propeller APC12060E Brushless outrunner motor Electronic speed control Battery Require...

Page 13: ...It may be necessary to remove the blind nuts and drill new mounting holes for other motor choices 3 Attach the motor to the speed control Secure the speed control in the fuselage using hook and loop m...

Page 14: ...er and check the operation of the motor It should rotate counter clockwise when viewed from the front of the fuselage Once the operation of the motor has been checked unplug the battery and attach the...

Page 15: ...r and adapter Allow for 1 8 3mm clearance between the propeller and cowl Drill four 1 16 1 5mm holes for the cowl mounting screws Enlarge the holes in the cowling only using a 1 8 3mm drill bit Secure...

Page 16: ...ll bit to drill the locations for the servo mounting screws Radio Installation Required Parts Fuselage Receiver Mini Servo 2 6 Y harness Required Tools and Adhesives Drill Drill bit 1 16 1 5mm 1 Insta...

Page 17: ...the rudder elevator and speed control into the receiver as well as the aileron Y harness Use hook and loop to secure the receiver in the fuselage Route the antenna wire through the tube in the fusela...

Page 18: ...eron servo cover left and right 3 4 x 3 8 x 3 8 19mm x 10mm x 10mm servo block 4 Control horn w backplate 2 2mm x 20mm screw 4 2mm x 10mm sheet metal screw 8 4 100mm linkage wire 2 Long Servo Arm JRPA...

Page 19: ...2 Drill a 1 16 1 5mm hole in the hinge center of both the aileron and wing 3 Place the hinges in the aileron 19...

Page 20: ...on has a block installed for the aileron control horn to mount to Make sure this block is located on the inboard side of the wing 5 Deflect the aileron and apply thin CA to each of the hinges Make sur...

Page 21: ...ension securing it with thread or a commercially available clip Center the servo and install a long servo arm onto the servo 7 Check to make sure you are using the correct servo hatch for the wing pan...

Page 22: ...m centered in the slot Use a felt tipped pen to mark the locations for the servo mounting blocks 9 Use 6 minute epoxy to glue two 3 4 x 3 8 x 3 8 19mm x 10mm x 10mm servo blocks to the servo hatch All...

Page 23: ...Note The servo should not rest against the hatch to isolate it from vibrations 11 Use a 1 16 1 5mm drill bit to drill the holes in the servo mounting blocks for the screws Secure the servo using the s...

Page 24: ...the wing using four 2mm x 10mm sheet metal screws 12 Pass the servo lead from the servo opening to the hole in the root of the wing Note A weight tied to a string can be used first then tied to the se...

Page 25: ...the clevis on at least 12 turns to start 15 Remove the backplate from a control horn Snap the clevis to the horn and position the horn so the holes are aligned with the hinge line and the pushrod is a...

Page 26: ...16 Use a 5 64 2mm drill bit to drill the locations for the control horn screws 17 Attach the control horn using two 2mm x 20mm screws and the control horn backplate 26...

Page 27: ...the pushrod where it crosses the control horn using a felt tipped pen 19 Bend the pushrod wire 90 degrees at the mark made in the last step Drill a 5 64 2mm hole in the servo arm and pass the wire th...

Page 28: ...joiner Use clamps to hold a second joiner to the first until the epoxy fully cures 22 Once the epoxy has had time to cure sand any excess epoxy from the joiner Test fit the joiner into one wing panel...

Page 29: ...eding 24 Mix up 1 2 oz 15ml of 30 minute epoxy Apply epoxy to both the wing joiner and the joiner opening of both wing panels Slide the joiner into a wing panel and then slide the remaining panel in p...

Page 30: ...quired Parts Fuselage Assembled wing 8 32 x 1 1 8 screw 2 8 washer 2 Stabilizer w elevators Rudder w fin Required Tools and Adhesives Phillips screwdriver Felt tipped pen 6 minute epoxy Paper towels R...

Page 31: ...ront of the wing to get the wing to fit 2 Slide the stabilizer into the slot at the rear of the fuselage Center the stabilizer as shown 3 Check that the wing and stabilizer are parallel Lightly sand t...

Page 32: ...izer to a point at the forward center of the fuselage Adjust the stabilizer so both measurements are equal 5 Once the stabilizer has been carefully aligned use a felt tipped pen to trace the outline o...

Page 33: ...Note Do not cut into the wood as it will weaken the stabilizer A soldering iron or hot knife can be used instead of a hobby knife 7 Slide the stabilizer partially into the fuselage Apply a thin layer...

Page 34: ...5mm tail wheel 2mm wheel collar 3mm setscrew 3mm x 6mm screw 2 Pushrod wire keeper 2 25 5 8 650mm pushrod wire 3 Control horn w backplate 3 2mm x 12mm screw 6 CA hinges 9 Required Tools and Adhesives...

Page 35: ...he tail wheel assembly and apply petroleum jelly to the wire above and below the nylon mount This helps prevent epoxy from binding the tail gear 2 Use 6 minute epoxy to glue the nylon mount into the f...

Page 36: ...1 16 27mm up from the bottom of the rudder Verify this measurement by holding the rudder in position against the fuselage 4 Cut a slot from the hole to the bottom of the rudder The slot will house the...

Page 37: ...hread the clevis onto a 25 5 8 650mm pushrod wire Slide the pushrod wire into the opening as shown 7 Place T pins in three of the CA hinges Slide the hinges into the rudder and then slide the rudder i...

Page 38: ...he rudder and mark the location for the horn 9 Remove the rudder and drill the two locations using a 5 64 2mm drill Mount the horn using two 2mm x 12mm screws and the control horn backplate 10 Roughen...

Page 39: ...o cure before continuing to the next step 12 Snap the clevis onto the control horn and use tape to hold the rudder centered Mark the pushrod where it crosses the servo horn using a felt tipped pen Not...

Page 40: ...e with the operation of the elevator servo Note Trim the rudder servo arm as shown in the photo 14 Prepare three CA hinges using T pins Use the hinges to temporarily attach an elevator half to the sta...

Page 41: ...ttach the control horn using two 2mm x 12mm screws 16 Position the elevator back onto the stabilizer and use thin CA to glue the hinges 17 Prepare two wheel collars by threading 3mm x 6mm screws into...

Page 42: ...ator servo arm as shown in the photo Note Ensure the radio is turned on with the trims and sub trims centered and the servos are centered 19 Repeat Step 14 through 16 to attach the remaining elevator...

Page 43: ...r to make sure both elevator halves are centered Once centered tighten the screws in the wheel collars Remember to use threadlock on those screws Note Once set coat the wheel collars and wire with 6 m...

Page 44: ...n Sandpaper Canopy glue Masking tape 1 Place the front windshield onto the fuselage Trace around the windscreen using a felt tipped pen 2 Lightly sand the fuselage inside the line drawn in the last st...

Page 45: ...e of the front windshield Position the windshield on the fuselage and use tape to hold it until the glue has cured 4 Use hobby scissors to trim out the side windows Trim the windows so there is a 1 16...

Page 46: ...se tape to hold them in position until the glue fully cures 6 Attach the wing to the fuselage Place the struts so the arrow on the strut is facing up and is pointing towards the front of the plane Sec...

Page 47: ...ft for flight is properly balancing the model Caution Do not inadvertently skip this step The recommended Center of Gravity CG location for the J 3 Cub is 2 5 8 66mm back from the leading edge The ran...

Page 48: ...o arm will have the opposite effect Moving it closer to center will decrease throw and away from center will increase throw Work with a combination of the two to achieve the closest or exact control t...

Page 49: ...r the Ni MH power system When flying from floats there are a few flight parameters to be aware of Because of the inertia generated below the centerline the aircraft can depart during certain harsh man...

Page 50: ...ess and or dangerous manner 4 The maximum takeoff weight of a model is 55 pounds except models flown under Experimental Aircraft rules 5 I will not fly my model unless it is identified with my name an...

Page 51: ...r interference test reports shall be signed by the parties involved and provided to AMA Headquarters Documents of agreement and reports may exist between 1 two or more AMA Chartered Clubs 2 AMA clubs...

Page 52: ...8629 2006 Horizon Hobby Inc 4105 Fieldstone Road Champaign Illinois 61822 877 504 0233 www horizonhobby com www E fliteRC com...

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