| 摘要 |
PCT No. PCT/DK97/00196 Sec. 371 Date Nov. 9, 1998 Sec. 102(e) Date Nov. 9, 1998 PCT Filed Apr. 30, 1997 PCT Pub. No. WO97/40665 PCT Pub. Date Nov. 6, 1997The invention relates to an otter board (20) which may be used for generating a spreading force in connection with trawl fishing. The otter board according to the invention comprises at least two foils (1-3) which are suspended between a number of longitudinally extending ribs (5, 6, 10, 17, 26, 27) in such a way that at least one tapered channel is formed in which the flow of water is passing through the otter board. The channels are curved and formed so that water is ejected at a high speed in relation to the towing speed in a direction slightly downwards and along a respective end section of an adjacent lower or intermediate foil extending from the outlets of the channels, whereby turbulence is prevented from occurring even at high angles of attack of the otter board. |
