09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
87
TAILCONE TOP FRONT SKINS
1.
Check alignment of the tailcone to the cage. Refer to figure 07-06A. Check
alignment often during final assembly of skins to the tailcone. The top seam will
be riveted last, permanently setting the tailcone alignment.
2.
Line up the spacer strips just aft of the tubes on the cage. Trim the tailcone
spacer strips to fit between the tailcone attach gussets. Transfer drill from the
tabs on the cage and cleco in place. Once fit up, the spacer strips may be
removed during the fit up of the top front skin.
3.
Use an edge forming tool to form an edge on the bottom edge on the top front
skin where it overlaps the longeron.
4.
Before forming the top front skin edge fit-up and trim as required, this piece is
supplied longer than needed for a custom fit-up following the tailcone center-line
seam.
5.
Form one of the top edges where they overlap each other. Also form the front
edge on the side. This formed edge will hold tight against the tube when
installed.
6.
Drill the holes in the Lexan Window to #27 to allow expansion of the rivets.
Deburr. Cleco the Window and Retainer to the top front skin.
7.
Cleco the tailcone top front skin to the side of station 4. Ensure the front bend fits
snug around the tube at S-3. Lightly clamp in place if needed.
8.
Position the window support angle to mate with the top corner of the fuselage
and top front skin. Avoid interference with the radius of the angle to the gusset.
Ensure the window support and top front skin are securely in place and no
pillowing exists between the skin and support. Transfer drill and cleco from the
top gusset on the cage to the window support and top front skin.
9.
Press the skin against the window support and clamp in place.
10.
Pull the skin up and forward and proceed from station 4 up the window support
angle. Transfer drill and cleco.
11.
Transfer drill and cleco the upper tailcone attach tab to the window support angle
and skin.
12.
Work your way forward from the bottom of the window support to station 3. Pull
the skin down and forward as you go to prevent pillowing. Keep downward
tension to keep tension in the front edge between the top attach gusset and the
middle longeron. Transfer drill and cleco in place.
13.
Place a weight on the station 4 to hold the top front skin down to the bulkhead.
14.
Press the skin tight around the top corner on station 3 and down to the outboard
tab on the cage. Drill and cleco in place.
15.
Pull flat and drill/cleco the remaining tabs.
