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Bill & Brendas RV-8 QB
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Date:  7-28-2014
Number of Hours:  5.00
Manual Reference:  dwg17a pg7-12
Brief Description:  Wing tips install -2

Brenda took some house insulation foam and pressed into the outboard edge of each wing to make an indention in the foam. She then marked the indention and cut out and sanded slightly small to allow room for the fiberglass tip to fit. We inserted the foam into the wing tips to keep them open enough for fitting and drilling.

We then used 60 grit paper and popsicle sticks to sand the lap joint to a clean crisp edge and so that the transition from wing skin to fiberglass tip.

We then positioned each tip tightly pushed fwd and taped with strapping tape.

I raised flaps and block clamped the ailerons to the flap and then block clamped the wing tip to the aileron.

Note: even with tip pushed in as far as I can and blocked, the aft edge is about 1/8 inch too long and will need to be trimmed and rounded to match the aileron. But at least it is coming out even in trail with everything.

Once the tips were in plkace with tape and block, I match drilled#40- the some 38 holes that secure the tip in place. These will eventually be inlarged for #6 screws later.

With tip on, I marked final gap edge for a 1/4 inch gap for the aileron and then removed, cut and sanded. Reinstalled and checked.

Moved aileron up and could slip rip piece in to the aft end of tip and then marked aft edge top and bottom. Removed and marked center lines on the rib and on the tip 5/16". I then marked for rivit holes 1.5" apart along line on glas tip and center punched. With tip off, I drilled a couple holes fwd int the rib for clecos and reinstalled. Clamped down in trail with aileron and then match drilled.

Note: the drilling of the wing tip and the wing tip rib all done by drilling 1 to three holes on top and then same on bottom back and forth going aft. Seemed to work fine. I recommend doing same and keeping everything clamped in trail with aileron and flaps.

more pics avail on request
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Foam cut and installed to keep tip open for install

Foam cut and installed to keep tip open for install

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Tip in place and blocked from creeping up or down while drilling. 1/4 inch gap cut and sanded in after

Tip in place and blocked from creeping up or down while drilling. 1/4 inch gap cut and sanded in after

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Fitting wing tip aft rib. Drilled while in place on wing.

Fitting wing tip aft rib. Drilled while in place on wing.

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