Great Planes Yak-54 EP 3D ARF - GPMA1542 - Manual (Page 18)

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7. Install two 2.4mm x 8mm flat head self-tapping screws into
the pre-drilled holes in the battery hatch blocks. Glue two
magnets into the battery hatch with medium CA as shown.
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8. Locate the two plywood battery hatch retainers. Glue
the two pieces together using CA. Draw a line on the back
former of the battery hatch that continues the shape of the
lightening hole arc across the webbing. Glue the battery hatch
retainer to the back former as shown at the line you drew.
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9. Trim the covering between the spars at the back of the
battery hatch for cool air exits.
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10. Test fit the battery hatch onto the fuselage. Adjust the
height of the flat head screws in the battery hatch blocks
until the hatch attaches to the fuselage securely. When
satisfied, apply a couple drops of thin CA glue to the
exposed threads of the screws.
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