Patent ID: 6834830
Filing Date: 2004-12-28
Classification: B64C,Y02T

Abstract:
A main wing structure comprising at least a leading edge structure and a wing central structure coupled to each other,wherein said main wing structure has a laminar-flow airfoil comprising an upper wing surface, a lower wing surface, a leading edge and a trailing edge, said upper wing surface including: a front profile portion which has a positive curvature radius, and which is provided to extend from the leading edge to a largest-thickness point located in a range of 30% to 50% of a wing chord length; a central profile portion which has a positive curvature radius, and which is provided to extend from the largest-thickness point to the vicinity of a position corresponding to approximately 90% of the wing chord length at which a value obtained by dividing a thicknesswise difference between the position and the largest-thickness point by a distance in a direction of a wing chord from the largest-thickness point is equal to or smaller than 0.12; and a rear profile portion which has a negative curvature radius, and which is provided to extend from the vicinity of a position corresponding to approximately 95% of the wing chord length to the trailing edge, and wherein coupled portions between said leading edge structure and said wing central structure are arranged at positions corresponding to approximately 20% of the wing chord length.