Rib Layout of an NC

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bow 2" solid 1/8" rib stern 1" solid
You might need to move 1-2 more ribs to the stern to hold the shape.
Don't forget the armor belt in the scale length 1/8" thick. Put the top of it 1/4" below the 3/8" deck rim
First 8 ribs are 1" on center The solid area at the bow and stern follow the shape of the hull
next 6 ribs are 2" on center
7 ribs at 3" 729 Ship Length Real feet
3 ribs at 4" 60.75 Ship length scale inches
15% solid percentage
9.113 solid inches
3 bow & stern inches
6.113 solid area for ribs
24.45 qty of 1/4" ribs