Great-planes Spectra Electric Sailplane Kit - GPMA0540 User Manual download pdf (Page 9)

CAUTION!!!: You must use extreme care when

cutting hinge slots with a hobby knife, to avoid

cutting yourself! If the balsa part breaks while

you are pushing on the knife, the blade could go

into your hand before you know it! A good

precaution is to wear leather gloves while

performing the following steps.

WING ASSEMBLY

D 2. Draw accurate centerlines down the trailing edge of

the stab and the fin. Cut the hinge slots on these lines using

a hobby knife or a slotting fork and slotting hook. (The

recommended hinge slotting technique is listed below).

A. Begin by carefully cutting a very shallow slit at

the hinge location. This first cut is to establish your cut

in the right place, so concentrate on staying on the

centerline and don't cut too deep!

B. Make three or four more cuts in the same line,

going slightly deeper each time. As you make these

additional cuts, work on going straight into the wood.

Continue this process while "wiggling" the knife handle

forward and backward until the blade has reached the

proper depth for the hinge.

C. Trial fit the hinge into the slot. If the hinge is

difficult to push in, re-insert the knife and move it back

and forth in the slot a few times to enlarge the slot.

D 3. IMPORTANT! Condition or "break-in" the hinges

by folding them back and forth several times.

A DECISION YOU SHOULD MAKE NOW...

"WING CONFIGURATION"

The SPECTRA kit has two different wing options: a two-

piece wing or a one-piece wing. The two-piece wing is the

standard way to build the wing and it is much easier to

transport. The instructions also explain how to build the wing

in one piece which makes it a little stronger but makes it

harder to transport in today's small cars

BUILD THE INNER WING PANELS

You'll need the following parts:

SPRTW01 1/8" Die-Cut Balsa Wing Ribs

SPRTW02 1/16" Die-Cut Balsa Wing Ribs, W2. W2S

SPRTW03 1/16" Die-Cut Balsa Wing Ribs, W2, W4-

W10

SPRTW04 1/8" Die-Cut Plywood Dihedral Braces

SPRTW07 1/16" Die-Cut Balsa Shear Webs

SPRTW08 1/8" Die-Cut Plywood Clamps and Gauges

SPRTW10 Shaped Balsa Leading Edge

SPRTW 11 Shaped, Notched Balsa Inner Trailing Edge

SPRTW13 1/8" x 5/16" x 23-1/2" Basswood Spars

SPRTW17 1/16" x 3" x 24" Balsa Wing Sheeting

D 4. Insert the hinges into the slots and trial fit the rudder

and elevator in place on the fin and stab. Do not glue the

hinges until after you have covered the model. The photo

for this step is at the top of the next column.

NOTE: The wing is designed to be built as a two-piece wing;

however, we also describe how to build a one-piece wing.

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Great-planes Spectra Electric Sailplane Kit - GPMA0540 User Manual Page 9

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