(Build the Meat Tray Flyer... pg 2)
At this point you should flip the wing over and
determine the center. The pad in the center of
the wing will be 1.75” wide. Score the plastic
film and peel it away to form three exposed strips
for the ribs to attach to. This is done to allow
the glue to soak into the foam.
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You must also peel the plastic off a strip running
the length of the center wing panel. This is where
a stiffener rod will be glued to strengthen the
wing. I used 2 mm carbon rod, but 1/8" dowel
would work also. Make sure the stiffener is placed
to fit in the notch in the ribs.
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Now cover the bottom of the three ribs with a piece
of 1/16" thick sheet balsa.
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Next, run a strip of clear wrapping tape from the
center pad out to each wingtip. I centered the tape
over the carbon rod. This provides additional support
for the wing.
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I painted over the glue joints on top of the wing
to improve the appearance of the glue joint, but
this is not necessary. However, you should cover
the joints and the centerline of the wing with a
strip of clear tape (I'm referring to the top of
the wing now). The tape in the center is to protect
the foam from the rubber band hold-down.
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The last step on the wing is to run a thin bead
of white glue all the way around on the exposed
foam edges. Rub it in to the foam. This will protect
the edges a little when it hardens. |
TAIL CONSTRUCTION
Begin by cutting out all four of the tail pieces
and round the edges the same way you did with
the wing. But remember - do not
round the edges that will mate to another piece
and be hinged.
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On the underside of the stabilizer pieces
and the left side of the rudder, bevel the
edges where the hinge will be. |
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Now you can make the hinges. If any of this gets
confusing, read through this part a few times
and look the photos over carefully.
The hinges are made of clear packing tape, about
1.5" to 2" wide. Starting with the horizontal
fin and stab pieces, fit the two parts together
at a 90 degree angle as shown in the photo below:
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Adjust the parts to create a 1/8" gap
between them, while maintaining their 90 degree
orientation. Then tape across the entire length
of gap at the outer corner, as illustrated
in the diagram to the right. |
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Next, turn one part 180 degrees to form a
90 degree angle in the opposite direction.
Then tape across the entire length of the
gap. I like to make the two pieces of tape
stick together in the center of the gap, all
the way across. |
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After the second piece of tape is applied,
the assembly should look like the photo on
the right.
Now apply hinge tape to the vertical fin and
rudder in the same way. |
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When you've completed the hinged assemblies, they
should look something like the photos below:
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Now make two control horns out of 1/32" plywood
as illustrated on the plan. Attach these to the
rudder and elevator in the positions shown on the
plan. I simply cut a notch in the foam and epoxied
the horns in.
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