15
WW19
Top outer wing rib
12
1/32 laser cut plywood
WW20
Top tip rib
2
1/32 laser cut plywood
WW21
Top tip rib doubler
2
1/32 laser cut plywood
WW22
Top wing tip
2
1/32 laser cut plywood
WW23
Top wing leading edge
2
1/64 laser cut plywood
WW9
Spar connector
2
1/32 laser cut plywood
WP3629
Aileron spar
stock
3/32 x 1/4 (2.4 x 6.4mm)
WW24
Aileron spar braces
8
1/64 laser cut plywood
WW25
Aileron center spar braces
4
1/64 laser cut plywood
Figure 1.14 Complete Top Wing without Ailerons
1.
Top Wing Basic Structure
The top wing basic structure is the same as the other two wings with the following exceptions:
The spar top and bottom are the same (WW16) and the top wing front is WW17 and rear
is WW18. Be sure when building the spars that the slots in the Spar Rear (WW12) are
oriented correctly matching the top and bottom. Also, be sure to build a left and right
spar.
On each half, the 4 inner most ribs (WW4) are the same as on the other wings. The 6
outer ribs (WW19) and the tip ribs (WW20
– 22) are shortened to leave room for the
ailerons as shown in Figure 1.14.
The top wing leading edge is WW23.
The Aileron Spar is made from 3/32 x 1/4 inch (2.4 x 6mm) stock carved as shown Sheet
D. Easy wa
y to carve this is to wrap fine sandpaper around a ¼” (6mm) rod. While
building the Top Wing put 1/64” (.4mm) spacers under this spar.
The Aileron Spar Braces (WW24) and the Aileron Center Spar Braces (WW25) are
added at each end and center of the spar before adding the cap strips as shown in
Figure 1.15 and on Sheet C. Position them so they align with the cap strips.
The rib twist bracing (ribbon) can be added in one piece starting at the bottom
center and tacking at the tips until you are sure it is well aligned.
Then go back with thin cyanoacrylate and wick it through each place it is in
contact with a cap strip. Finish with clear finish or thin cyanoacrylate.
Figure 1.15 Tip section of top wing