Golden
Era Model Service
High
Quality Plan Sets for Radio Control Aircraft
Carl Goldberg's 1938 Comet Clipper
All the glue applied to this point has been small amounts of CA just to
tack the joints in place. Once free of the trestles,
Tightbond III is liberally applied with a brush to all of the joints.
Goldberg used 1/4 balsa for the leading edge of the
fin, and 3/16 for the trailing edge and rudder, so 1/32 shims are
placed under the 3/16 parts
when
assembling the perimeter. A bridge was glued on to make the
rudder trailing edge continuous with the fin during assembly.
Note the
balsa key in
the front fin join, included in the laser cut parts next to the parts
for the fuselage front trestle sides.
To align the rudder spar during assembly, it is spot
glued to the fin aft spar with 1/32 shims placed in three places
between the parts.
The
ribs are 1/16 X 1/4 balsa, pick some fairly stiff pieces at least for
the bottom ribs. It might also be a wise idea to put 1/16 balsa
spacers between
the ribs in mid span areas. Taper the ends as shown to mate with
the leading and trailing edge parts.
There are shims (.144") on the 1/4 balsa sheet of laser cut parts near
the right end to place under the fin 1/4 inch parts. Add 1/32
balsa to the ones
placed
under the 3/16 parts, and the thin one (.049") under the base of the
front fin spar. The thin one for the fin spar base is not in this
photo.
Second side
assembled using the same shim placement. The rudder upper rib
has also been installed, from scrap 1/8 balsa.
The assembled parts sanded out.
The parts
separated out. The rudder front spar will later be sanded to a
round shape. There is a lower fin rib to be installed when the
fin is
assembled to
the horizontal stabilizer. It is in the laser cut parts.
Clipper Mk
II Building Photos and Notes
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