Time to put the nose skin on the skeleton.
Do Y’all remember the scene in the movie Jeremiah Johnson where the old trapper brings Jeremiah a bear to skin? The old man runs through the front door with a live Griz right behind him and as he exits through the back door he shouts to Jeremiah who is standing flatfooted in the cabin “Skin that’un Prilgrim and I’ll bring you anuther’un!”. I felt like Jeremiah when I started this part. I needed 5 hands and 10 tools. Just keep a cool head and measure everything thrice and it all comes together.
1. Mark the centerline of each nose rib flange, top and bottom all the way back through the spar flanges.
2. Instead of transferring measurements from the spar to the skin, I did this: Set and clamp the skin on top of the spar flange and transfer the centerline marks directly to the skin at the tip bend. No measurement or transfer errors this way! Now use a square to extend the centerline marks to the top and bottom aft ends of the skin. In the picture to the left imagine the skin lifted straight up, rotated 90 degrees counterclockwise, and the skin bend placed directly on top of the spar bottom flange.
3. Mark a straight line to define the first row of holes in the skin and predrill these holes. Now you can see the centerline mark on the ribs through the holes to ensure correct alignment of the ribs.
4. The rest is the same procedure outlined in the Bearhawk newsletter describing the procedure for skinning the wings. I drilled and clecoed each row (inboard to outboard direction) but stopped before drilling the spar flange.
5. At this point the spar is held straight.