Below you see a rib blank marked out, with the flange area designated using a flange marking tool I made.
Here’s a closeup of the flange marking tool.
The rudder top rib was a right pain in the you-know-what, but it turned out OK.
Once I finish with the rudder ribs, I will move on to the vertical fin ribs. I won’t actually assemble the rudder or fin since I do not yet have a bending brake long enough to bend the rudder or fin spars. Yep, you guessed it… I’ll be making a bending brake too! Stay tuned for that. 🙂
View all of the construction photos (newest first) in this Google album.