RANS S-20 RAVEN
TEXT MANUAL
05C-04
05/01
/2017
UPPER AND LOWER ROOT SKINS
21.
The root skins consist of an Upper and Lower Skin.
22.
IMPORTANT: Upper Root Skin orientation is determined by an extra
hole in the FWD Tip side of the skin.
Refer to
FIGURE 05C-22
for
orientation.
23.
The Lower Root Skin has flanges on the Leading and Trailing Edge.
NOTE: There is a left-hand and right-hand as well as a top and bottom
side to the Lower Root Skin.
The Lower Root Skin is positioned such
that the flanges point up as to “envelope” the tank. #40 holes are pre-
located along the root side of the skin which match to Tinnerman
locations in the Root Rib. Refer to
FIGURE 05C-23
for orientation.
24.
Most rivet holes in the Upper and Lower Root Skins are dimpled to
accept countersunk rivets. Some rivet locations must
NOT
be dimpled.
Refer back to
FIGURES 05C-22
and
05C-23
for details.
IMPORTANT:
Be sure the dimpling is done to the correct sides of the Root Skins
.
25.
Root Skin Stiffeners will also need to be dimpled.
26.
Cleco Root Skin Stiffeners to
lower
side of the Upper Root Skin. Riveted
flange of Stiffeners will face AFT.
27.
Cleco Root Skin Stiffeners to
upper
side of Lower Root Skin. Riveted
flange of Stiffeners will face AFT.
28.
Rivet Stiffeners to Root Skins.
29.
Cleco Lower Root Skin to Root and #2 Ribs. Cleco Upper Root Skin to
Root and #2 Ribs.
30.
Refer to
FIGURE 05C-30
. Mark and drill the two #30 holes as shown
through the Upper Root Skin and Trailing Edge Spar.
CAUTION: Do
NOT locate or drill any other holes in the spar, structural damage to the
spar could result.
31.
Using the AFT edge of the Upper Root Skin as a guide, mark a line on
the Trailing Edge Spar. Bond the Root Skin to the spars during Leading
Edge Wrap bonding. Refer to
LEADING EDGE WRAP
for more details.
32.
Using the FWD edge of the Upper Root Skin as a guide, mark a line on
the Leading Edge Spar. Bond the Upper Root Skin to the spars during
Leading Edge Wrap bonding. Refer to
LEADING EDGE WRAP
for more
details.
33.
Now is a good time to secure the lower Sight Gauge fittings inside of the
Root Rib. Position the Internal Thread Elbow (refer to Fuel Tank
Assembly parts page) inside of the lower Sight Gauge hole in the Root
Rib. Secure the fuel line to the compression tube with a Nylon Tie and
stand-off. Cut fuel line to length as required to connect to the fitting on
the AFT inboard side of the Fuel tank.
