Hydrodynamic appendage such as a keel or a centerboard, and a method of fabrication
AssigneeSafran
InventorsSandra Andrieu, Jean-Michel De Monicault
Life of this patent
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Abstract
A method of fabricating a hydrodynamic appendage for a ship, the method including the steps of: forming two metal half-shells having outside surfaces that form the flanks of a hydrodynamically-active portion of the appendage; forming a metal head including a mechanism for securing the appendage to the ship; and assembling together the half-shells and the head so that the head is sandwiched between the top ends of the two half-shells and closes a top portion of an internal volume defined by the half-shells. The half-shells are welded to the head so as to make the internal volume watertight.
Claims14
A method of fabricating a hydrodynamic appendage for a ship, the method comprising the steps of:
- forming two metal half-shells having outside surfaces that form flanks of a hydrodynamically-active portion of the appendage;
- forming a metal head including means for securing the appendage to the ship;
- and
- assembling together the half-shells and the head in such a manner that the head is sandwiched between top ends of the two half-shells and so as to form an internal volume between the two half-shells, the assembly formed by the head sandwiched between the two half-shells being welded together so as to make the internal volume of the appendage watertight, and the head including recesses defined by side edges that extend to come into contact with side edges of the top ends of the half-shells.
A hydrodynamic appendage for a ship, the appendage comprising:
- two metal half-shells having outside surfaces forming flanks of a hydrodynamically-active portion of the appendage;
- and
- a metal head including means for securing the appendage to the ship;
- the half-shells and the head being assembled together in such a manner that the head is sandwiched between top ends of the two half-shells and in such a manner as to form an internal volume between the two half-shells, the assembly formed by the head sandwiched between the two half-shells being welded so as to make the internal volume of the appendage watertight;
- and wherein the head includes recesses defined by side edges that extend to come into contact with side edges of the top ends of the half-shells.
A method of fabricating a hydrodynamic appendage for a ship, the method comprising the steps of:
- forming two half-shells having outside surfaces that form flanks of a hydrodynamically-active portion of the appendage, each of the two half-shells having a length greater than a width so as to form an elongated shape extending from a bottom end to a top end of the half shell;
- forming a head;
- and
- assembling together the two half-shells and the head wherein the head is sandwiched between the top ends of the two half-shells and to form an internal volume between the two half-shells, the assembly formed by the head sandwiched between the two half-shells welded together so as to make the internal volume of the appendage watertight, and wherein the head includes recesses defined by side edges that extend to come into contact with side edges of the top ends of the half-shells.
Dependencies are inferred from the claim text.