Sailplane Construction Project Session #115
The wing's complete leading edge has been
trimmed, sanded, and shaped. The complete trailing edge has been trimmed,
sanded and tapered as well. This afternoon I went over the entire wing with
320 and then 400 grit paper for final finish sanding before covering. At
last the Sailplane's wing structure is finished and I asked Sue to take
the picture below of me holding the wing finished structure.
The finished wing structure weighed in at 252
grams (8.89 oz) as shown below.
However, the right side of the wing came out
slightly heavier than the left side. The wing's center line was placed on
a piece of balsa triangular stock on the work table and a 3" piece of 1/8"
solid lead solder was used to balance the wing structure. As you can see
below, the length lead solder was inserted through holes in two of the ribs
and up against the aft face of the second spar. Then it was adjusted in
position spanwise and CA'd in place as shown below.
The balanced wing structure now weighs 256 grams
(9.03 oz) before covering.
At this point I will store the wing on the wing
rack and go back to the fuselage for some other detail work. The fuel tank
has to be plumbed with provisions for overflow and fill tubes extending
through the cowl to the outside. Then exit cooling air ventilation holes
have to be worked out in the cowl to insure proper engine air circulation
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