Installed (located and cleco'd) rib #2, then made and installed ribs #3, #4 and #5.
Then I want back and modified the RIGHT #1 rib (only; not the left) with a mod that cuts 1/4" off the tail of the rib, and replaces it with an angle (photo #2) that takes the place of the flange that got cut off.
It's even harder to align the first main ribs than the nose ribs. Although I draw the 1/4" guideline on the forward flange of the rib (bottom of photo 1) that will show through the web holes (ie - align the red guideline by sighting through the holes in the web). But It's difficult to get the first couple of ribs aligned by hand. So in photo 1 you can see I drew a red line 1/4" off of the web holes. This corresponds with the 1/4" offset from the face of the rib holes. That way I get the rib roughly aligned with the web holes, even though they are obscured by the rib flange.
I align, clamp, and then tip up the spar to I can look through the holes in the web to find the red guideline on the forward flange of the rib.
Clear as mud?!
Red line on spar to align with LEFT outside face of rib
The RIGHT #1 rib (only; not the left) gets this mod.
