Christian Lucas
Well-Known Member
- Joined
- Aug 23, 2012
- Messages
- 339
Hi,
i want to start a discusion about a lower drag ruder and turnfin. On a simple waterflow test stand i messured 1/3 to1/4 of drag using a disc that rotates free in a ballbearing . The disc is from a rollingcutter knife so it is sharp . The differenc i messured first fix it so it dosn't rotate and than let it free running by the waterflow. Maybe this will lower drag on a straight away boat . For a oval racing boat we have to look about the strearing posibility .It will stear but as it has not the better lengh to wide ratio it will have less stearing power . I have not test it jet on a boat but next time when the wether will zurn to springtime i prove it . What are your thoughts ?
By the way , you can also drive the disc by e motor like a paddlewheel to get no drag and you can use such disc under a streamlined sponson as the surface that is in contact with the water . For this you have to give it a low angle of attace and a flat V position to let only one side be in contact .
i want to start a discusion about a lower drag ruder and turnfin. On a simple waterflow test stand i messured 1/3 to1/4 of drag using a disc that rotates free in a ballbearing . The disc is from a rollingcutter knife so it is sharp . The differenc i messured first fix it so it dosn't rotate and than let it free running by the waterflow. Maybe this will lower drag on a straight away boat . For a oval racing boat we have to look about the strearing posibility .It will stear but as it has not the better lengh to wide ratio it will have less stearing power . I have not test it jet on a boat but next time when the wether will zurn to springtime i prove it . What are your thoughts ?
By the way , you can also drive the disc by e motor like a paddlewheel to get no drag and you can use such disc under a streamlined sponson as the surface that is in contact with the water . For this you have to give it a low angle of attace and a flat V position to let only one side be in contact .
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