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Steve & Nancy Riffe
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Date:  12-16-2015
Number of Hours:  4.00
Manual Reference:  
Brief Description:  R. tip rib installation

More work on right wing tip—I clecoed the tip to the wing and measured for clearance with the aileron. The plans call for a ¼” clearance, but that seems excessive, so I trimmed for 3/16” gap. Looks good—I can always open it up some more if need be. I started in on the rib that goes in the aft portion of the tip to keep the fiberglass from flexing. Since I am using the hinge method to attach the tips, the supplied rib is too long. I inserted the rib and marked on the top and bottom where the rib would intersect the hinge pieces. Instead of cutting the rib for a perpendicular flange, I angled the end between the ends of the hinge pieces. I made a poster board template to approximate where I would need to bend the rib, then cut off a portion. After much measuring and head scratching, I drew a bend line on rib, clamped it to a piece of wood and clamped it in my vice. I used another block of wood to hammer the flange to a 90 degree bend. Trimmed it all up and put some relief cuts in the corners. Next, I laid out and drilled holes in the fiberglass tip to attach to the rib. Clamped the rib into position and match drilled thru the fiberglass into the rib. I discovered on one end, that I would not be able to squeeze or buck the last rivet, so I moved over and drilled a new hole in the glass and rib. I’ll just glass over the errant hole.
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Cut and rebent rib

Cut and rebent rib

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Match drilling tip to rib

Match drilling tip to rib

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Done!

Done!

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