NOSE RIBS
V6
The Rib stations are defined by the pre-drilled holes in the Main Spar. A common rivet line
through the Nose Rib Flange and the and Rear Rib flange will hold the Ribs on both sides of the
Spar web.
DESIGN FEATURES OF THE WING SKELETON
•
The bottom of the Rib is flat and at 90 degrees to the Spar Web.
•
The Rib Stations are at 90 degrees with the top of the spar.
•
The Ribs are evenly spaced at interval of 560mm (center line to center line) measured along
the top of the Spar.
•
Rib #6 is positioned at 110mm from the bottom corner of the spar as shown on 6SV2
•
The Ribs are parallel to each other and at 90 degrees to the bottom spar extrusion.
5.
Rivet the L Angle at the O/B end of the Main spar.
REFERENCE
: Bottom diagram on 6SV2
POSITION
: a) The flange overlaps the Spar extrusions on the front side (web side).
b) The L Angle flange faces aft (like the spar extrusion)
CLAMP & CLECO:
Clamp and drill with #20 in the top and bottom extrusion.
CUT
: Mark and trim the top and bottom angle flush with the spar. Rivet with one A5
6.
Cleco the Nose Ribs to the pre-drilled Main Spar.
REFERENCE
: 6SV2
LAYOUT:
a) Mark the flange center lines on the Rib.
b) On the Main Spar, connecting the pre-drilled holes at each rib station with a
vertical line. (front and back side of the Spar). Also extend the line on the top
and bottom spar extrusion extrusion (this reference line will be used later to help
center the pre-drilled skins over the center of the ribs).
POSITION
: a) The Rib flanges face inboard towards the wing root (left & right Ribs).
b) Clamp the Nose Rib to the spar over the pre-drilled holes along the top
and bottom extrusion.
c)Also clamp Nose Rib #6 to the L Angle (already riveted to the Spar).
CHECK
: a) Use a square against the side of the Rib and the top of the Spar extrusion to
Check the 90 degree angle.
b) The flange center line is visible thought the Spar Web pre-drilled
holes.
c) Check the alignment of the bottom flange of the Rib is flush and even with the
Spar extrusion – if necessary adjust the width of the Rib by working on the top
flange.
d) The Rib flange center line lines up with the Rib station previously marked on the
Spar extrusion.
DRILL & CLECO:
a) Back drill the Rib with pilot holes through the
pre-drilled Spar #40
b) Nose Rib #6 : the top and bottom hole require an AN3 bolt (see bottom
diagram on 6SV1). For ribs S7 to S9 us A5 at the top and bottom
through the Spar Extrusions.
c) Remove the Rib, and back drill the rib pilot holes with #20 for A5
rivets.
