GREAT PLANES YAK 55 Instruction Manual - Page 7

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BUILDING INSTRUCTIONS

CENTER

STRING

❏

1. Slide the horizontal stabilizer into the slot at the rear of

the fuselage. Check the alignment using the sketch above

as a reference. Use a common pin to secure a length of

string to the front center of the fuselage. Adjust the position

of the stab in the stab slot until the length of string is equal

on both ends of the stab. Be careful not to flex the fuselage

as you make measurements.

❏

2. When you are satisfied with the alignment of the

stabilizer, glue it in place with low-temperature hot-melt glue.

When gluing EPP parts together with hot-melt glue, you

can use this technique to create a very strong bond if the

parts form an angle between them.

Run a small bead in the corner between the two parts.

A = A

B = B

Use the glue-gun tip to re-melt the glue bead, causing it to

penetrate into the joint and form into a fillet. The gun tip will

also slightly melt the foam, allowing the glue to fuse with it

somewhat, forming a very strong joint.

90 degrees

❏

3. Slide the wing into the cutout in the fuselage. Make sure

the wing is centered and square in the fuselage, and parallel

with the stabilizer when viewed from the front. Again, be careful

not to flex the fuselage as you make your measurements.

❏

4. When you are satisfied with the alignment of the wing,

glue it in place with hot-melt glue.

❏

5. Use hot-melt glue to secure four hinges in the precut

slots in each aileron. Do not worry about a little excess glue

squeezing out onto the hinge pivots—it is easily removed

with a hobby knife after the glue hardens.

A=A