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Pico Tiger Moth Instruction Manual Supplement

 

Pico Tiger Moth Construction Photos

 

Click on any picture to see an enlarged view

1.


Here are some tips for getting good results installing the graphic stickers on your top wing.  Do NOT try to install them in one piece.  Because of the compound curves on the wing surface, they will wrinkle if you do.  Rather, cut them in half first as shown here.  Install the first half with the center of the sticker right in line with the top of the simulated second-from-the-tip wing rib.  Rub it down carefully with your fingers.  Now add the second half of the sticker so that it just barely overlaps the first half.  Rub it down carefully with your fingers.  Now your sticker will lay nice and flat and will look great!

2.




When hinging your control surfaces, we recommend first cutting them apart as shown.  Then you can place a metal straight edge flush with the hinge line and cut the desired bevel with an X-Acto knife.
 

Add tape to the control surface first as shown.  Then line up the control surface with the fixed surface and press the tape into position.  We use and sell Blenderm™ tape for hinging control surfaces.  It's very sticky and works extremely well.  Also, we cut the 1"-wide tape into 1/2"-wide strips before using it... you can do twice as many planes that way, and save weight to boot!
 

Here's how your hinged stab/elevator should look from the bottom after hinging.
 

After applying tape to the top surface, fold the elevator completely back over the stab as shown.  Then apply small strips of tape on the bottom surface to lock the surface in place.  The edges of one bottom tape strip is outlined in black here for clarity.


3.

To improve the aerobatic performance of your Pico Moth, cut away a bit more of the elevator opening in the rudder as shown.  This will enable you to achieve more elevator travel and will enhance your model's inverted flight and tail-spin capabilities.

4.


You can cut away a bit of the elevator as shown to increase rudder travel.  This will enhance your model's capability to do snap rolls and tail spins which are a lot of fun!  Nothing detrimental results from this simple modification.

5.



If the bottom wing cover is applied in standard configuration, your wing will either have too much dihedral or the cover will "pucker" at the outside edges when affixed to your wing.  To solve this problem, we cut some cross-slots in the cover with scissors as shown.  Then when the cover is epoxied onto the wing, the slots allow you to overlap the cut edges and the cover will lay flat against the wing.

Before applying epoxy, be sure to roughen the plastic cover with Scotch-Brite™ or fine sandpaper.  Since we're building the painted Pico Tiger Moth here, we also removed the paint from the wing in the area where the cover is glued.


6.





Here we are preparing the wing struts prior to painting and mounting them to the wings:
  1. First drill the small holes for the wing rigging that will be added later.
  2. Dull the plastic with Scotch-Brite™.
  3. Sand a flat edge on the CF strut stiffeners (if used).
  4. Run a thin bead of medium CA for each strut stiffener.
  5. Be sure to make a left and right set of stiffeners.
  6. Paint the struts and stiffeners.  We used acrylic craft paint (brown).

7.

To mount your MAE "Slo-Fly" brushless motor, first glue the plywood laser mounts to the motor's 8mm bearing tube using these INSTRUCTIONS.  Position the motor assembly on the motor stick as shown.  Adjust fore-aft location so the prop shaft protrudes from the cowling.  Finally, secure motor to motor stick as described in the laser mounting instructions referenced earlier in this paragraph.

8.



Here is a neat tail-skid that will turn with your rudder and greatly enhance your ability to taxi your Moth.  I simply used a scrap piece of 1/32" music wire to bend the skid itself.  The 1/32" ply guide-plate is about 1/4" wide and is drilled for the wire as shown.

This assembly can easily be added to a completed model, as the rudder is already in place before you attach the skid and guide-plate.  Simply align the components as shown and then glue the guide-plate to the bottom of the fuselage.  The "steering arm" is held in place by the rudder control horn, so place it between the control horn and the rudder as shown.


9.



Wing rigging (flying & landing wires) is very functional and extremely important!  Resist the temptation to skip these.  Use dental floss or any non-stretch thread.  I use "Spider Wire" 40-lb kevlar fishing line.  A bent needle is helpful for installing the wires through the holes you drilled in the wing struts earlier.

Where the wires go through the bottom wing at the fuselage, drill small holes in the plastic wing cover and loop the wire through the wing, out the bottom, through small plastic reinforcements as shown, and back up through the wing cover.  You can make the plastic reinforcements from scrap plastic in your kit.  These are important to prevent the flying wires from cutting through the foam wing under flight loads.

This last photo shows our finished rigging.  Since the wires start and end at the same position (see supplemental instructions), you can simply pull the wires snug and then tape the loose ends to the wing strut.  This will enable you to adjust them if/when necessary.

 
   
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