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Building the Wing Center Section

 
22.

 
Pin the 1/16" x 3/16" trailing edge into position on the plan. Pin the 1/16" sq. bottom spar into position.

 
23.

 
Glue rib W-1 into position.

 
24.

 
Glue the two W-3 wing ribs into position.

 
25.

 
Glue the 1/16" sq. top spar Into position. The ends can extend slightly past the W-3 ribs.

 
26.

 
Glue W-1A to the front of W-1. Now glue the two W-2 ribs into position.

 
27.

 
Glue the two 3/32" sq. leading edge pieces into position.

 
28.

 
Remove the wing center section from the plan.

 

Building the Right and Left Wing Panel

 
29

 
Pin the 1/16" x 3/16" trailing edge into position.

 
30

 
Pin the 1/16" sq. lower spar into position.

 
31

 
Position and glue rib W-4 and the four W-5 ribs into position.

 
32

 
Glue the 3/32" sq. leading edge into position.

 
33

 
Glue the two 1/16" x 3/16" wing strut supports into position.

 
34

 
Glue the wing tip parts W-6 and W-7 together.

 
35

 
Glue the wing tip into position. Be sure to raise the end to match the height of the top 1/16" sq. spar as shown on the plan.

 
36

 
Cut a bevel on one end of the 1/16" sq. top spar and glue it Into position. The inboard end can be slightly longer than shown 
on the plan.

 
37

 
Remove the wing panel from the plan. Now build the Left wing panel in the same manner as you did the right.

 

Joining the Wing

 
38

 
Pin the center section back onto the plan. Place the left and right panels into position. Raise the wing tips for the proper 
dihedral shown on the plan. This should be 1/2" under the last wing rib. Do a final check to ensure that everylhing is aligned 
properly and then glue the left and right wing panels to the center section.

 
39

 
Remove the wing from the plan and sand it smooth. Sand the leading edge round and sand a taper on the trailing edge.

 

Cover the Model

 
40.

 
Sand the entire model smooth with 400 grit sandpaper. Test fit the wings to the fuselage. Test fit the tail surface with the 
fuselage. Make any adjustments necessary to achieve the proper fit.

 
41.

 
Coat the edges and surfaces that will touch the tissue covering with two coats of clear dope.

 
42.

 
Attach the tissue to the model with dear dope mixed 50/50 with thinner. Do not cover the top rear of the fuselage between 
the wing and the tail now. This area will be covered after the wing is attached to the fuselage and the top rear stringer is 
glued Into position.

 
43.

 
Lightly mist the model with water to shrink the tissue.

Summary of Contents for Piper J3 Cub

Page 1: ...c Propeller 1 Propeller Shaft 2 Brass Washer 2 Brass Eyelets 1 Thrust Bead 2 Wheels 1 1 8 x24 Rubber Strip 3 Laser Cut Sheets Tools and Building Supplies You will need the following items to assemble this model You must read and follow all of the manufactures instructions provided with these items Glue CA White Glue Sigment or Ambroid all work well Cutting Tools A hobby knife with a 11 blade is us...

Page 2: ...slight discoloration on the edges of the laser cut parts may be removed by lightly sanding the edges with 400 grit sandpaper Beginners Note These instructions were written assuming that the builder has previous building experience If this is your frrst model then we recommend that you purchase a copy of the following book Rubber Powered Model Airplanes By Don Ross This excellent book covers basic ...

Page 3: ... 8 Place F 5 into position and glue it to the fuselage side frame 9 Glue the opposite side frame to parts F 4 and F 5 Make sure that the fuselage assembly remains true and square during assembly 10 Glue part F 7 into position Glue part F 8 into position 11 Glue part F 6 into position 12 Pull the aft end of the fuselage sides into contact and glue them together 13 Glue the 1 16 sq cross braces into...

Page 4: ...rd end can be slightly longer than shown on the plan 37 Remove the wing panel from the plan Now build the Left wing panel in the same manner as you did the right Joining the Wing 38 Pin the center section back onto the plan Place the left and right panels into position Raise the wing tips for the proper dihedral shown on the plan This should be 1 2 under the last wing rib Do a final check to ensur...

Page 5: ...lack and glue them to the model Cut the paper cooling baffles from the plan and paint them black Now glue them into position over the dummy engine cylinders 55 Cut and fit the wing struts to fit your model Sand them smooth and cover them with tissue Now glue the wing struts to the model making sure that you do not induce a twist in the wing 56 Glue the two brass eyelets to the removable nose block...

Page 6: ... damaged buy use or modification In no case shall Herr Engineering Corporation s liability exceed the original cost of the purchased kit Further Herr Engineering Corp reserves the right to change or modify this warranty without notice In that Herr Engineering Corporation has no control over the assembly or use no liability shall be assumed or accepted for any damage resulting from the use by the u...

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