Wing structure of airplane

A wing structure for use with an airplane comprising:

• a first spar;
• a second spar;
• a plurality of ribs extending in a cord direction, each rib being coupled between said first spar and said second spar extending in a span direction;
• wherein said first spar is of an I-shape and said second spar is of a C-shape in section, each of said first and second spars having a web, a pair of flanges connected to opposite ends of said web and a reinforcing partition wall connected to said web and said flanges;
• and
• wherein said ribs are positioned in the span direction by coupling front portions of said ribs to said reinforcing partition wall of said first spar and coupling rear portions of said ribs to said reinforcing partition wall of said second spar.

A method of forming a wing structure for use with an airplane comprising the following steps:

• positioning an upper skin on a surface;
• forming a first C-shaped spar with a web, a pair of flanges connected to opposite ends of said web and a reinforcing partition wall connected to said web and said flanges;
• forming a second I-shaped spar with a web, a pair of flanges connected to opposite ends of said web and a reinforcing partition wall connected to said web and said flanges;
• positioning said first C-shaped spar on the skin;
• positioning said second I-shaped spar on said skin at a position displaced a predetermined distance relative to the first C-shaped spar;
• positioning a plurality of ribs extending in a cord direction, each rib being coupled between said first C-shaped spar and said second I-shaped spar extending in a span direction;
• and
• coupling front portions of said ribs to said reinforcing partition wall of said first C-shaped spar and coupling rear portions of said ribs to said reinforcing partition wall of said I-shaped second spar.