SIG Piper J3 Cub Assembly Instructions Manual Download Page 3

Building the Tail Surfaces

 
1.

 
Pin the plan to your building board and cover it with a sheet of wax paper to prevent the glue from sticking the parts to the 
plan.

 
2.

 
Build the stabilizer over the plan using parts S-1, S-2, S-3, S-4, S-5 and G. The remaining structure is made from 1/16" sq. 
balsa strip.

 
3.

 
Build the rudder over the plan using parts R-1, R-2, R-3 and G. The remaining structure is made from 1/16" sq. balsa strip.

 
4.

 
Remove the rudder and the stabilizer from the plan. Sand the leading and trailing edges round and then sand the parts 
smooth all over.

 

Building the Fuselage

 
5.

 
Bulld the two fuselage side frames over the plan using parts F-1, F-2 and F-3. The remaining structure is made from 1/16" 
sq. balsa and 1/16" x 1/8" balsa strip. 

 
6.

 
Cut two 1/16" strips to length and glue them to the rear face of part F-4 as shown on the plan.

 
7.

 
Posttion F-4 onto one of the side frames. Hold it 90 degrees to the side frame and carefully tack glue it into position with 
one small spot of glue at the top and bottom.

 
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 position as shown on the plan in the cabin and aft fuselage areas.

 
14.

 
Glue part F-9 into position.

 
15.

 
Glue the 1/16" sq. strips into position between F-6 and F-7.

 
16.

 
Glue parts F-3A into position on the outside of parts F-3.

 
17.

 
Glue the fuselage side stringers into position as shown on the plan.

 
18.

 
Bend the landing gear wire to the shape shown on the plan. Glue the landing gear wire into position and then glue part F-5A 
into position.

 
19.

 
Glue the removable nose block parts C-1 and C-2 together. Test fit the nose block to the front of the fuselage but do not 
glue into place.

 
20.

 
Drill a 1/32" hole In the nose block for the propeller shaft. Be sure to maintain the proper right thrust and down thrust when 
drilling this hole.

 
21.

 
Sand the nose block to shape and sand the entire fuselage smooth all over.

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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