Verfahren zur Herstellung einer Schaufel eines Schiffspropellers sowie nach dem Verfahren hergestellte Schaufel

摘要

The body of a hollow propeller blade is fabricated in sections disposed generally transversely across the blade by progressively building up the body beginning from the root section and working toward the tip by welding a wall section on the pressure side of the blade to the preceding wall section and grinding both sides of such weldment to enable a very thorough inspection of the weld to be made before installing the corresponding wall on the suction side of the blade. Each succeeding section moving away from the root may be of progressively thinner plate material, and the wall plate of each section may be constituted by separate parts with the outer parts being of thinner plate material than the center part. Longitudinal stringers and transverse ribs extend across the body cavity in spaced-apart relation.