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The honeycomb layer is surrounded with carbon fiber, and the front, curved portion, of the D cell has fiberglass covering on the outside. The
fiberglass covering provides a means of visually checking for damage, as any area that has been affected will be readily identified by white streaks.
The spar is the vertical portion of the D-cell and is protected by the curved surface to the front.
The ribs attach to the D-spar, and swing out into position, to hold the rear portion of the sail. The sail itself fits completely around the front of the
D cell, and is held together, in the back, with Velcro, and strings to the end of the ribs for tension.
