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Sig Mfg.<br />
Somethin'<br />
Extra ARF<br />
he Somethin' Extra has been providing Sunday fliers with a whole lot of fun for quite some time. Since Sig<br />
first introduced it in kit form, its good looks and outstanding flight performance have made it a favorite at RC<br />
__ flying fields all over the world. Now you can get it into the air more quickly than ever. The almost-ready-to-fly<br />
(ARF) Sig Somethin' Extra is the spitting image of its predecessor. It has the same strong, lightweight design and<br />
flying capabilities of the original, but this one comes 90 percent built, right out of the box. The Somethin' Extra ARF<br />
is expertly covered with Oracover and is offered in two color schemes: white and bright red and white and violet.<br />
WHAT'S IN THE BOX?<br />
Like many of today's high-quality ARFs,<br />
the Somethin' Extra comes with just<br />
about everything you'll need to get flying<br />
except the radio, engine, prop, fuel<br />
tubing and pilot figure—which is, of<br />
course, optional. The major components<br />
come built up and already covered. In<br />
addition, the package includes colormatched<br />
fiberglass wheel pants, wheels,<br />
sturdy aluminum landing gear, a clear<br />
molded canopy, a fuel tank, an engine<br />
mount, a spinner, tail-support wires and<br />
a unique tube wing-mounting system. It<br />
also comes with a complete hardware<br />
package of high-quality parts and an 18page<br />
assembly manual filled with plenty<br />
of photos, sketches and detailed assembly<br />
instructions. This is a first-class<br />
package that's built to the high-quality<br />
Sig kits.<br />
44 MDDEL AIRPLANE NEWS<br />
ASSEMBLY<br />
Before you begin assembly, cover your<br />
workbench with an old blanket or foam<br />
pads to prevent denting or scratching the<br />
precovered parts. Remove any wrinkles in<br />
the covering with a cloth-covered heat iron.<br />
You can also use a hobby-type heat gun to<br />
reshrink the covering, but you must be very<br />
careful around any seams or color joints.<br />
Reheating seams will cause them to "creep,"<br />
and this can make them unsightly. This is<br />
especially true with the Somethin' Extra's<br />
trim scheme and pinstriping.<br />
WING<br />
Assemble the wing first. The two wing panels<br />
are practically ready to use. You have<br />
only to install a servo in each panel, hinge<br />
the ailerons and attach the control horns<br />
and linkages. The CA-type hinges have a<br />
die-cut center slot that, according to the<br />
instructions, is supposed to be used to cen-<br />
ter the hinge equally into both the wing<br />
panel and the aileron. Here, I chose not to<br />
follow the procedure presented in the manual<br />
because I felt that placing the hinges<br />
with the slot parallel to the hinge line, as<br />
instructed, would have left each with an<br />
effective hinge width of only about M inch.<br />
Instead, I oriented the hinges with the slot<br />
perpendicular to the hinge line and used a<br />
pin to center the hinge. This not only uses<br />
the full width of the hinge but also allows<br />
the Zap CA to wick along the slot and into<br />
the wood.<br />
The Somethin' Extra's plug-in wing panels<br />
are a nice feature; you usually see them only<br />
in much larger planes. This obviously eliminates<br />
the need to glue the wing halves together,<br />
and having the wing in two pieces makes<br />
for easy transportation and storage. The wing<br />
halves are slipped onto an 1/16-inch-diameter<br />
aluminum tube and are held in place with a<br />
no. 64 rubber band looped over J-hooks
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