Great Planes Giant Aeromaster Kit - GPMA0502 - Manual (Page 34)

D 6. On the centerline of the stab, make marks at 1" and
5-7/8" aft of former (J). At each mark, drill a 3/32" hole
through the stab, the stab plate and the stab mounting
blocks. Place 3/4" flat washers on the # 8 x 1 " sheet
metal screws. Apply 6-minute epoxy to the threads.
Thread the screws into the stab, stab plate and stab
mounting blocks. Be careful not to overtighten the screws
and crush the sheeting on the stab.
D 7. If you haven't already done so, final sand the fin. Test
fit the fin on the stab with the trailing edge of the fin
between the fuselage sides. Adjust the length of the fin
trailing edge so the base of the fin fully contacts the stab
(you may need to enlarge the cut-outs for the screws in the
stabilizer). Use a drafting square to ensure that the fin is
perpendicular to the stab. Make adjustments if needed.
Then glue the fin to the stab, fuselage sides and the bottom
rear deck with 30-minute epoxy. Use a square to keep the
fin perpendicular to the stab. Use masking tape to hold the
fin in position until the epoxy cures.
D 2. Use thin CA to glue the die-cut 1/8" balsa doublers
(V) to the back of former (J) and against the fin.
D 3. From the 3/32" x 3" x 24" balsa sheet, make two rear
turtledeck sheets by cutting the sheet in half. Use the
template on the fuselage plan as a guide to trim the
sheets. Use thin CA to glue the sheets to the fin backing
(W) and the stabilizer; be sure the forward edge is against
former (J). Wet the outside of the balsa sheets and let them
soak for a few minutes. Apply a thin bead of medium CA
along the edge of former (V). Carefully pull each sheet in
place. Hold the top of the sheet against the fin, and apply
thin CA along the joint.
D 4. After the rear turtledeck sheet dries, sand the sheet
flush with former (J) and the TE of the fin. Balsa filler can
be applied to the joints and sanded to make fillets between
the sheet and the fin and stab.
D 1. Hold a straightedge along the top of the turtledeck and
against the side of the fin. Use a ballpoint pen to draw a line
on both sides of the fin, matching the angle of the turtledeck.
Use thin CA to glue the die-cut 1/8" balsa fin backing (W)
flat on the stab and against the fin and former (J). D 5. Use leftover 1/4" balsa sheet from the fuselage sides to
fill the gap between the lower aft end of the rear turtledeck
sheet and the fuselage side. Carefully sand to blend the
sheet to the fuselage side. Also, sand the fuselage side and
the filler pieces flush with the TE of the fin.
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