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17

Step 9.

Carefully check the vertical stabilizer to make sure it’s

aligned 90 degrees to the horizontal stabilizer. A 90-degree
triangle is helpful in this step.

Hint: 

When installing the vertical stabilizer, use the rudder
to check for proper stabilizer height. It may be neces-
sary to cut off a small amount from the bottom of the
vertical stabilizer to get the rudder to drop down to the
proper position so the rudder and fuselage align.

Step 10.

Double check the horizontal and vertical stabilizer

alignment. It may be necessary to slightly trim balsa wood on
the fuselage or tail parts with a sharp hobby knife to achieve
exact alignment.

Step 11.

When you’re satisfied with the alignment, carefully

mark the position of the vertical stabilizer to fuselage with a pen-
cil at the junction where the vertical stabilizer meets the fuselage.
The pencil should make a light indentation in the covering.

Step 12.

Remove the horizontal and vertical stabilizers from the

fuselage. Using a sharp hobby knife and a straight edge, careful-
ly cut the covering at approximately 1/16" inside the lines you
drew, on both sides of the horizontal and vertical stabilizer

Note:

Some covering may already be removed. If necessary,
remove any excess.

CAUTION

It is very important that you do Not press hard enough
to cut into the wood structure, as doing so could weak-
en the horizontal stabilizer.

CONTINUED

Section 5: Installing the Horizontal 
and Vertical Stabilizer

Summary of Contents for J-3 Piper Cub

Page 1: ...13 16 lbs Recommended Engines 2 Cycle 1 08 1 48 4 Cycle 1 20 1 80 Gas Zenoah G23cc 254 cm 154 cm 3429 sq cm 5 9 7 3 kg 100 Wingspan 90 pre built Covered in Cub yellowWorldTex fabric covering Includes...

Page 2: ...on 11 Installing the Engine Gasoline 28 Section 12 Assembling and Installing the Fuel Tank Glow and Gas Versions 30 Section 13 Installing the Radio System 34 Section 14 Assembling and Installing the R...

Page 3: ...feet with an approximate range of 220 miles at cruise The Piper J 3 Cub is 22 4 1 2 long has a 35 2 1 2 wingspan and measures 6 6 in height A military version with some minor changes was designated th...

Page 4: ...ss or servo extension Recommended JR Systems JR 400EX JR 421 EX JR XP652 JR XP783 388 JR XP8103 JR 10X JR PCM10SX Engine Requirements 1 08 1 48 2 cycle engines 1 20 1 80 4 cycle engines 23cc gasoline...

Page 5: ...ons Tools and Supplies Needed not included in kit Adhesives Thin CA cyanoacrylate glue Thick CA cyanoacrylate glue CA remover debonder 6 minute Epoxy 30 minute Epoxy Blue Locktite Canopy glue Tools Dr...

Page 6: ...and rudder HAN1552 Small Parts Windshield Sidewindows HAN1555 Wing Joiner HAN1559 Landing gear HAN1557 Wheels DUB425TLC Engine mount glow HAN2033 Servo Tray Engine mount Zenoah G 23 Wood pushrods 4 4...

Page 7: ...position of the hinges The J 3 Cub comes with four high quality hinges in each wing panel Step 3 Remove each hinge 4 from the wing panel and insert a T pin near the center of the hinge as shown below...

Page 8: ...e the CA penetrates into both the aileron and wing Step 8 Use CA remover debonder and a paper towel to remove excess CA that may have accumulated on the wing or in the aileron hinge area Be careful wh...

Page 9: ...ng Step 3 Trial fit the wood servo blocks into the servo opening You will mount these with epoxy after you have made sure they fit and that the servo will fit into the space Some material will have to...

Page 10: ...o mount the servo into the wing You will want to first run the servo lead and servo lead extension through the wing and out the wing root Step 7 We recommend using a piece 24 of the string pro vided w...

Page 11: ...the servo arm is positioned closer to the leading edge of the wing Note The supplied 4 40 threaded linkages are of a specified length so make sure the servos are orientated correctly Step 9 With the s...

Page 12: ...leron servo arm so that it will be approximately 90 degrees to the link age when attached Next turn off the receiver then the transmitter Step 4 To establish the length of the linkage required trial f...

Page 13: ...screw holes for mount ing the control horn Since the aileron is balsa we recommend applying thin CA glue into the aileron through the drilled holes to saturate and stiffen the balsa in the mounting ar...

Page 14: ...4 Slide both wing panels on the wing braces and attach the left and right wing panels using the two wing bolts washers provided This is a temporary installation to help in the align ment of the horizo...

Page 15: ...trim the opening to allow the horizontal stabilizer to be inserted By noting the centerline you marked position the horizontal stabilizer so that it s centered in the fuselage opening where the verti...

Page 16: ...alignment of the horizon tal stabilizer with the wing carefully mark the position with a pencil at the junction where the horizontal stabilizer meets the fuselage The pencil should leave a slight inde...

Page 17: ...ieve exact alignment Step 11 When you re satisfied with the alignment carefully mark the position of the vertical stabilizer to fuselage with a pen cil at the junction where the vertical stabilizer me...

Page 18: ...bilizer fuselage junc tion with rubbing alcohol and a paper towel Use masking tape to hold the horizontal stabilizer in place while epoxying the vertical stabilizer in place in the next step Step 15 M...

Page 19: ...same for the other elevator Step 3 Locate one nylon horn Trial fit the horn on the right elevator with the horn positioned so the holes that the clevis will go into are aligned with the hinge line of...

Page 20: ...hard ware The top of the rudder control horn is located 1 5 8 up from the bottom of the rudder Measure and mark the left side of the rudder as the pilot is sitting in the cockpit This is the side the...

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