Patent ID: 8262030
Filing Date: 2012-09-11
Classification: B64C,Y02T

Abstract:
1. A vehicle comprising; a wing; a twistable portion on the wing; and a control system for implementing a first twist distribution and a second twist distribution in the twistable portion of the wing; wherein the control system is able to vary twist amount for the first and second twist distributions to implement a twist distribution based, at least in part, upon an equation, the equation being where and where ω(θ) is the twist distribution b is a wingspan, {tilde over (C)} L,α is an airfoil section lift slope, c(θ) is a local airfoil section chord length at θ, θ is equal to cos −1 (−2z/b) where z is a spanwise coordinate and b is a wingspan, {tilde over (C)} Ld (θ) is a target airfoil section lift coefficient distribution that is to be produced over the wingspan, and C L is a lift coefficient of the wing.