Carl Goldberg GBGA0040 - Manual (Page 10)

9. ‡ Tack cement the rudder to the fin and then
transfer the hinge locations onto the rudder. Do
not sand.
10. ‡ Referring to the plan, flat sand the fin/rudder
assembly and the stab/elevator assembly,
rounding all outer edges except the bottom and
lower 2” of the fin leading edge. Take care not
to sand away the hinge locations.
‡ Sand the elevator tips to blend with the stab.
‡ Holding the CGM centerline marker at an angle,
so that the pegs touch the wood, lightly pass the
marker back and forth so that the point scribes
a line, marking the hinge locations on the fin and
the stab.
‡ Again using the centerline marker, mark a cen-
terline along the entire leading edge of both the
elevator and the rudder.
12. ‡ Using an awl or similar tool, make a pilot hole at
the hinge locations on the fin and the stab.
‡ Move the stab T.E. close to the edge of the table
and, using 1/16” scrap ply as a shim, make sure
the T.E. is level and steady.
‡ Carefully drill 1/16” holes for the hinges, as
shown above.
8. ‡ Referring to the plan, mark the hinge locations
on the fin T.E.
‡ After gluing the fin and rudder pieces, allow to
dry before continuing.
11. ‡ Carefully separate the stab from the elevator
and the fin from the rudder. Gently sand to
remove any rough spots from tack-cementing.
10
TILT CENTERLINE
MARKER SO PEGS
TOUCH
SCRAP PLY END VIEW
THROUGH STAB
KEEP FLAT ON SHIM