Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1997-07-14
1999-04-06
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428167, 428188, 114288, 244130, B32B 300, B63B 132, B64C 138
Patent
active
058915516
ABSTRACT:
An apparatus for reducing drag over a flow surface and methods for using same is disclosed in one presently preferred embodiment as including a drag reduction member comprising a means for reducing drag over a surface facing of a substrate (e.g., watercraft, airplane, automobile, airfoil, rudder, or the like) moving through a fluid (e.g., liquid or gas) parallel and opposite to the direction of motion. The drag reduction member includes an exterior surface, an opposing contacting surface adapted to selectively cover at least a portion of the surface facing of the substrate, and an opening integrally formed in the body of the drag reduction member to enhance flexibility upon installation and provide greater resistance to impact forces. The opening may be sealable by means of at least two extension wings engageably disposed in relation thereto. The means for reducing drag over at least a portion of the flow surface of the substrate comprises at least two elongated channels or at least two complimentary pairs of elongated channels formed in the exterior surface of the drag reduction member, wherein each of the elongated channels or pairs of elongated channels are formed having an angular configuration selectively diverse dimensionally from the angular configuration of each of the other elongated channels or pairs of elongated channels of the drag reduction member.
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