Abstract:
An article including an airfoil or hydrofoil is disclosed. On at least a portion of a surface of the airfoil or hydrofoil there is a seamless film having a series of substantially parallel peaks separated from each other by a series of substantially parallel valleys on a patterned first surface of the film, wherein the seamless film has a long dimension that is at least two meters long substantially aligned with the span of the airfoil or hydrofoil, and wherein an angle between the parallel peaks and valleys to the long dimension of the seamless film is at least five degrees. Methods of making the article are also disclosed.
Abstract:
A patterned film is disclosed. The patterned film includes at least a first patterned region and a non-patterned region juxtaposed with the first patterned region on a first surface of the patterned film. The patterned region has a series of substantially parallel peaks separated from each other by a series of substantially parallel valleys. The first patterned region and the non-patterned region extend side-by-side for the length of the patterned film in the machine direction, and the parallel peaks and parallel valleys in the first patterned region extend at an angle of at least five degrees to the machine direction. An article including an airfoil or hydrofoil have a seamless portion of the patterned film on its surface is also disclosed.
Abstract:
An article including an airfoil or hydrofoil is disclosed. On at least a portion of a surface of the airfoil or hydrofoil there is a seamless film having a series of substantially parallel peaks separated from each other by a series of substantially parallel valleys on a patterned first surface of the film, wherein the seamless film has a long dimension that is at least two meters long substantially aligned with the span of the airfoil or hydrofoil, and wherein an angle between the parallel peaks and valleys to the long dimension of the seamless film is at least five degrees. Methods of making the article are also disclosed.