RANS S-20 RAVEN
TEXT MANUAL
05C-01
05/01
/2017
WING – RIB & SHEET METAL INSTALLATION
WING RIB ASSEMBLY
NOTE: LORD brand FUSOR 108B/109B
Adhesive is recommended for
bonding the sheet metal wraps to the FWD & AFT wing spars.
Leading Edge,
Root, and Tip Wraps are riveted with 1/8” Stainless Steel Flush rivets. A
suitable 1/8” Dimpling Tool and Counter Sink will be required. Aircraft Spruce
has an inexpensive 1/8” Pop Grip Dimpler.
IMPORTANT: Wings are mirror assemblies, repeat the procedures described
for one to both, unless otherwise specified.
A corrosion protection coating is recommended between the Ribs and Rib
Clips.
1.
Select the necessary parts as shown in the parts drawing. Refer to
FIGURE 05C-01
for Rib location and position numbering.
2.
The ribs are pre-pressed aluminum. The forming process leaves the ribs
slightly bowed.
IMPORTANT: Lay the ribs, flange side up, on a flat
table. Use “Fluting Pliers” on the depressed areas to take the curvature
out of the ribs. Flip the rib over and check that flange surface touches a
flat tabletop evenly at all locations. Do this for all ribs.
3.
Separate into Right Hand & Left Hand ribs.
4.
The open flange side of the ribs will face toward the wing root. The
exception is the root rib (#1) which will face the tip.
5.
Each wing will have a root and tip rib, which are different from Ribs #2
thru #11.