FIELD: building materials.
SUBSTANCE: trawl board (1) has height (H) and length (L), contains several curved and overlapping plates (31-34; 41-44; 51-54), which include leading plate (31; 41; 51), and which pass in the direction of height (H). Trawl board (1) forms a towing surface containing towing bracket (64) and an opposite trawl surface containing bridging bracket (63, 65). Trawl board (1) contains at least one adjusting means (2) for adjusting a hydrodynamic surface of trawl board (1), while specified adjusting means (2) contains at least one through hole (21) or at least one cutout (22), cover (23) made with the possibility of displacement in the direction of length (L), and drive element (24) of the cover. When cover (23) is in a closed position, it covers through hole (21) or cutout (22). Adjusting means (2) is located on the towing surface of leading plate (31; 41; 51).
EFFECT: invention provides adjustment of a hydrodynamic surface of a trawl board.
6 cl, 12 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TRAIL DOOR | 2014 |
|
RU2644954C2 |
| OTTER BOARD | 1997 |
|
RU2181001C2 |
| TRAWL DOOR OR PARAVANE WITH REMOTE CONTROL ADJUSTMENT | 2012 |
|
RU2599160C2 |
| LIGHT MOLD OTTER TRAWL FOR HIGH-RATE TRAWLING THAT FEATURES HIGH HYDRODYNAMIC EFFICIENCY, METHODS OF ITS PRODUCTION AND APPLICATION | 2005 |
|
RU2346433C2 |
| TRAWL BOARD WITH FLOW ACCELERATOR TO INCREASE LIFTING CAPACITY | 2016 |
|
RU2731196C2 |
| OTTER BOARD (VERSIONS) | 2004 |
|
RU2292713C2 |
| OTTER TRAWL BOARD | 2004 |
|
RU2267271C1 |
| OTTER | 0 |
|
SU1768098A1 |
| OPENING APPARATUS | 2019 |
|
RU2773646C1 |
| CONSTRUCTION OF ALLOPELAGIC TRAWL BOARD OF IMPROVED EFFICIENCY, OBTAINED USING MATERIALS AND METHODS OF UNIVERSAL ACCESSIBILITY | 2005 |
|
RU2501214C2 |
