Protective grille for a tunnel inlet of a tunnel of a transverse jet propulsion of a watercraft, tunnel inlet and tunnel of a transverse jet propulsion

摘要

Protective grating (100) for a tunnel inlet (10) of a tunnel (11) of a transverse jet propulsion (12) of a watercraft comprising lattice elements (29, 30), wherein the protective lattice (100) is in a state arranged at the tunnel inlet (10) in a longitudinal axis (16) of the tunnel (11) with respect to a tunnel center plane (24, 27, 28), wherein the tunnel center plane (24, 27, 28) at an angle of 0 ° to 60 ° to a horizontal (20), an upper area (25) and a lower region (26), characterized in that the number density of the lattice elements (29, 30) in the lower region (26) is greater than the number density of the lattice elements (29, 30) in the upper region (25) and or that the protective grid (100) has a denser grid structure in the lower region (26) than in the upper region (25) and / or that the lower region (26) has greater coverage by the grid elements (29, 30) than the upper region (25).