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RANS S-21 OUTBOUND
Primer is always a debate when it comes to aluminum aircraft. Part of the decision to
use 6061 was to get away from priming, as 6061 exhibits good corrosive resistance.
We recommend priming overlaying surfaces. If you live near the ocean, your aircraft
will be on floats, or the aircraft will be stored outside it may be a good idea to prime all
aluminum surfaces. Formed aluminum parts may require some attention. Ribs will
need to be fluted and some ribs may need the flange angles tweaked slightly. Some of
the angles on the bulkheads may need tweaked as well. This is an important step and
can significantly improve the appearance of the aircraft as any imperfection will be
transferred to the skin and visible to any onlooker.
DEBURRING: Many parts will need to be deburred. This is an IMPORTANT step and
must be performed. Assembly of parts with burrs can cause stress risers and eventual
part failure. Various tools can be used. A deburring tool is nice but a 1/2" drill bit can
do a good job on most holes. Radius and smooth sharp corners with files or fine-grit
sanders and grinders. Edges of certain parts also need deburring...a good file works
here.
CLECOS: These are temporary fasteners that will be used to hold things together
while fitting and drilling. A pair of cleco pliers is also required to install and remove the
clecos. The clecos are color coded as to hole size.
Silver
Copper
Gold
To use, simply set cleco in the special pliers, squeeze closed, insert into the hole and
release. (Reverse for removal). You will find the clecos to be extremely useful
throughout assembly.
ROD ENDS: When installing rod ends and similar hardware, be certain at least ten
threads are engaged, unless directed otherwise within the text.
Rod Ends must be engaged a minimum of 10 complete turns.
RIVETS: Your kit is supplied with various sizes of aluminum and stainless steel rivets.
Even though we are careful, there is always the chance of the packages being
mislabeled. So before riveting, be sure to double check that you have the correct
aluminum or stainless steel rivet for the particular section you are working on.
MARKERS: Throughout the manual, you are instructed to mark on various parts. Use
flairs or any type of felt tip marker. Avoid using pencils. The graphite in the lead will
cause the aluminum to corrode.
ENGINE WARRANTY: Refer to the documentation which is included with the engine.
TEXT MANUAL
#40
#30
#11
CAUTION
13
09/11/2018
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