RANS S-20 RAVEN
TEXT MANUAL
9/01/2013
01-01
FUSELAGE FORMER INSTALLATION
IMPORTANT: The fuselage frame should be primed and painted before formers
or anything else is installed.
NOTE: All fuselage formers must be cut to length from raw stock provided. Mark
and check fit carefully before cutting. In addition, pay attention to the wall
thickness of the raw stock called out in the parts manual.
TOP FORMER
1.
Install the Top Former (top of fuselage). The forward end will need to be
modified per
FIGURE 01-01
. The aft end will slip over the stub extending
from the vertical stabilizer. The forward end will rest on top of the tab aft
of Station 3. Bow the former downward to touch the vertical attach tubes
on stations 4, 5 and 6.
2.
Mark the location of the tubes where they contact the former centerline.
Remove the former and drill 1/4” holes at these locations through the
bottom side of the former only.
3.
Re-install the former, the support tubes will slide into the former and
bottom out against the top wall. It may be necessary to slightly bend the
support tubes into alignment. Trim the former as needed to clear Station
3.
4.
Locate and drill # 40 holes through each support tube just below the
stringer. Locate and drill # 40 holes through the former just aft of each
support tube. Refer to
FIGURE 01-04
.
5.
Hold the former tight against the support tubes and safety wire through the
hole pairs to retain former position.
6.
Transfer drill #30 through the tab aft of Station 3 and cleco. Drill #30
through the former and vertical stabilizer stub. Refer to
FIGURE 01-04
.
7.
Rivet each former end using a stainless steel rivet.
