FIELD: fishing.
SUBSTANCE: hollow trawl board has one or more chambers and aerofoil profile in cross section, and also contains: first side panel (1), having curvature forming rear surface, second side panel (2) having a curvature forming a front surface and upper panel (3) forming an upper part of the trawl board, and lower panel (4) forming a lower part of the trawl board. First side panel and second side panel are connected at front edge and at rear edge of aerodynamic profile. Trawl board comprises one or more openings (5), providing possibility of water inflow from the trawl board. Radius of the second side panel is equal to at least 1–5 radii of the first side panel. Trawl board additionally comprises reinforcing tube (6) along front edge of aerodynamic profile and reinforcing bar (7) along trailing edge of aerofoil, to increase strength of hollow trawl board.
EFFECT: invention provides high stability and efficiency of trawl door.
16 cl, 24 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| CONSTRUCTION OF ALLOPELAGIC TRAWL BOARD OF IMPROVED EFFICIENCY, OBTAINED USING MATERIALS AND METHODS OF UNIVERSAL ACCESSIBILITY | 2005 |
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|
RU2777736C2 |
| SPREAD BOARD FOR TRAWL | 0 |
|
SU1697662A1 |
