09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
126
WING TIP
NOTE:
Mounting Plate for strobes may be installed before or after fit up of
wing tip.
ASSEMBLY
1.
Cut the round end off the trailing edge of the support rib at the point where it
transfers from the round end to the rib.
NOTE:
Use a pair of hand shears or a Dremel with a cutoff wheel. Debur
as needed.
2.
Trim the support rib down to a flange length
of ¾” from the face of the rib. Cut out
all the rib pockets
to ¾” flange as well.
3.
The flat side of the support rib will bolt to the rib on the end of the wing and the
flange will extend into the wing tip when assembled. As such, the very aft section
of the support rib must be tapered to fit inside the wing tip when assembled.
Taper the flange length down to
1/8” at the very rear to 3/4” where the aft most
rib support starts.
4.
Trim the wing tip to the molded in trim line. Use a sharpie or masking tape and
highlight the trim line for ease of seeing the line.
5.
Place a masking tape edge around the wing on the very outside edge. Carefully
stick the tape down with the very edge of the tape to the very edge of the skin of
your wing. This tape can
be ¾” or wider tape. Note the width of the tape. It will be
used for a measuring reference where the wingtip overlaps the wing during fit up.
6.
Position the wing tip on the wing and closely match the profiles. Minimize the
overlap but let the tip overlap onto the wing if necessary. Tape in place.
7.
Use the edge of the tape as a reference to measure and mark the end of the
wing onto the wingtip. Make a series of marks to produce a new trim line. Pay
close attention to any areas that holds the wing tip away from the skin and spar.
If the spar sticks out slightly from the rib, trim around these spots as well. Take
your time and trim precisely.
8.
Once trimmed hold the tip back up to the wing and verify fit. Repeat the process
until you are satisfied with how the wingtip mates to the wing.
9.
Debur all the edges of the wing tip and wing tip support rib. Sandpaper works
great.
10.
The wing tip and wing tip support rib can now be glued together. Create a fixture
out of a piece of 3/4" MDF or plywood.
a.
Lay the support rib on the MDF or plywood and mark the outside
perimeter.
