L ANGLES STIFFENERS
V-2
L Angles stiffeners are positioned midway between the ribs on the Top and Bottom Skins - except
for the first two inboard ribs at ribs #6 and #7 for the wing locker.
The aft edge of the top L Angles overlap on top of the Rear Zee flange (right middle diagram on
6F8)
1.
Back-drill the L Angles Stiffeners for the top and Bottom Skins (left and right sides). The
Stiffeners are crimped later to the same curvature as the ribs.
REFERENCE
: 6SV4 top right diagram, 6V8. Page 17 of the Construction Manual.
POSITION
: Between the Rear Ribs.
WING LOCKER
: The wing locker replaces the first Skin Stiffener between R.R #6 and #7
NOTE
: The definition of an L Angle is shown in the upper right hand diagram on drawing
6V5. These are supplied in 4 feet length flanges of equal width bent at 90 degrees (the wiggle
line in front of the 19 means an approximately, dl=36 stand for developed length: the width of
the flat sheet before it is bent).
LAYOUT
: a) Mark the center line on the outside flange of 12 L Angles (4ft length)
b) Identify the rib station and the position of the L Angles on the pre-drilled skins.
c) The L Angles face the towards the Root or fuselage, see 6V8
BACK-DRILL
: Drill through the pilot holes when the center line of the L angle is visible.
a) Place the L Angle over the edge of a 1 x 2 furring strip (3/4” board), slide the
board and L Angle and board under the Skin.
b) Allow the L Angle to overhand the front edge of the Skin by approximately ½”
inch.
c) Back drill and Cleco an end hole when the flange center line is visible. Drill and
Cleco a second hole before drill the inbetween holes.
CUT
: Mark the width of the Skin on the L Angle, use a marker to trace the edge of the Skin on
the L Angle. Remove the L Angle to mark the cut line:
a)
From the mark traced along front edge of the Top Skins, go in 30mm (the
front of the L Angle to clear the Main Spar top extrusions).
c) From the mark traced along the aft edge of the Top Skin go in 2mm (the L
Angle is to overlap on top of the Rear Zee 6V7-11 flange – setting the end of
the L angle 2mm back from the aft edge of the Skin will provide just enough
clearance for to keep the end of the L angle clear of the Rear Zee radius of the
top flange).
d) Bottom Skin: the front edge of the L angle is also 30mm in from the edge of the
Skin
e) Go in 22mm from the aft edge of the bottom Skin (this is the width of the Rear
Zee bottom flange).
