ITEM 1:      On sheet #1, the material for bulkhead C1 was 2024-T3 it is now shown as 6061-T6. Either can be used, the change is for economy only.

ITEM 2:      On sheet #8, (for clarification) the .025 x 12 ¾ rear spar doubler is located on the inside and between the ribs.

ITEM 3:      For those who would like to make one piece ribs, the dimensions for the lightening holes and stiffening embossments are shown in the diagram below.  The outside dimensions are the same as the full size built up ribs shown on the plans (be sure to add enough material to your one piece blank to make your flanges).

MORRY’S METHOD FOR DRILLING FUSELAGE SKINS

This method will insure bulkheads will not move, for perfect edge distance of bulkheads.

1.       Drill all bulkhead tabs for rivet locations.  Wrap skin F to E.  With 12” long #41 bit, drill from inside out through skin. 

2.       Apply two rows of ¾” masking tape.  Draw line from center of holes 2” long toward rear.

3.       Draw line 1½” from rivet hole to rear.

4.       Every 5^th hole install ³/₃₂” type 3 rivet to hold bulkhead in place.  File heads down.

Apply skin E to D.  Apply tape over rivet holes.  Draw line forward from 1½” line on tape to rivet hole.  Measure 1½” forward locating rivet hole.  Drill through skin and cleco.  Drill through ³/₃₂ rivets