FIELD: fishing and fish farming.
SUBSTANCE: invention relates to a pelagic trawl door with a variable hydrodynamic area. At its trailing edge (12), the trawl door is provided with movable plate elements (13, 14) that can be displaced in longitudinal direction of the trawl door. Opening (21) or the region at the trailing edge (12) can thereby be opened up or covered by a plate element (13, 14). Displacement can be effected by means of a screw spindle (22), which is operated manually or driven by an electric motor.
EFFECT: by the invention is achieved a change in the area of the trawl door can occur such that a reduction in lateral force at the same time results in reduction of the towing resistance, thereby maintaining or enhancing the effect of the trawl door during fishery.
14 cl, 18 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TRAWL BOARD | 2019 |
|
RU2777736C2 |
| TRAWL BOARD WITH FLOW ACCELERATOR TO INCREASE LIFTING CAPACITY | 2016 |
|
RU2731196C2 |
| CONSTRUCTION OF ALLOPELAGIC TRAWL BOARD OF IMPROVED EFFICIENCY, OBTAINED USING MATERIALS AND METHODS OF UNIVERSAL ACCESSIBILITY | 2005 |
|
RU2501214C2 |
| OTTER BOARD (VERSIONS) | 2004 |
|
RU2292713C2 |
| TRAWL OTTER BOARD | 2006 |
|
RU2323572C1 |
| TRAWL BOARD WITH AERODYNAMIC PROFILE | 2016 |
|
RU2727058C2 |
| WING-SHAPED TRAWLER'S BOARD | 2001 |
|
RU2194388C1 |
| TRAWL BEAM | 0 |
|
SU1414372A1 |
| SPREAD BOARD FOR TRAWL | 0 |
|
SU1697662A1 |
| TRAWL DOOR OR PARAVANE WITH REMOTE CONTROL ADJUSTMENT | 2012 |
|
RU2599160C2 |
