09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
79
TAILCONE
Refer to section
7
of parts and figure drawings.
INITIAL ASSEMBLY
1.
Assemble and rivet the bulkheads as shown in PARTS MANUAL DRAWINGS
007-01, 007-03, 007-05, and 007-07.
NOTE: S-10 AFT bulkhead doubler will need the flanges slightly bent to
conform to the shape of the tailcone. It is bent on the same jig as the
bulkhead and will be under bent.
2.
Carefully bend the flanges on the aft doubler on the S-10 bulkhead to be flush
with the S-10 bulkhead.
3.
Transfer drill and rivet the holes in the flanges of S-4, S-5, and S-6 bulkhead
doublers.
4.
Double check the angle of the flanges on the bulkheads to make sure they will
mate to the skins. The angle on the bottom should be 97°. The angle on the
sides should match the tailcone bottom skin geometry. Set the bulkheads on the
tailcone bottom skin to compare. The top bulkhead flanges may be altered prior
to installing the top tailcone skins. If the flanges need adjusting, carefully bend
the flanges as needed using a pair of duckbill pliers/grips or similar. The amount
of bending should be minimized. The angles should be close, but do not bend
them back and forth to get them perfect. This will weaken the flange at the bend.
5.
Set the bulkheads aside.
6.
Cut out the slot covers in the aft inspection hole of the bottom skin. If building a
trike, deburr and keep the slot covers for later installation. Taildraggers will not
use the slot covers. Refer to
FIGURE 07-01
.
7.
Orientate the Tailcone Bottom Skin per
FIGURE 07-01
. Refer to the aft diagonal
stringer holes for proper orientation. Rivet the inspection cover tab rings to the
upper side of the tailcone bottom skin. On the Access Panel Tab Rings do NOT
rivet the holes where stringers overlap. Refer to
FIGURE 07-01A
. These will be
riveted after installing the belly stringers.
8.
Use a few Clecos to attach the lower longerons and stringers in place on the
same side of the bottom skin as the access cover tab rings. Note stringer
orientation on PARTS MANUAL DRAWING 007A-01 and
FIGURE 07-01A
. The
stringers are placed with the bottom flanges pointing to the centerline. The
stringers will stick out in either direction until they are trimmed. Notice the
stringers overlap the inspection cover tab rings. Mark the stringers .25" from the
last hole on each end. Remove and trim the stringers.