daggerbaord design

[preston]

if you were to design the best daggerbaord for optimum speed and performance what would it be ? length width edge etc.

 

[DanB]

Enjoy

http://www.onemetre.net/Design/FinForce/FinForce.htm

http://www.onemetre.net/Design/FinArea/FinArea.htm

Will there be a quiz?

 

[preston]

man...... way over my head, i just wanted to go to the shop and cut out a board.

 

[DanB]

From what I’ve read Alex Bryan and Cortlandt Heyniger did just what you are thinking of and lucked out. I’m sure there was a period of trial & error with a scrap heap of reject designs.

When you said you wanted “the best dagger baord for optimum speed and performance” it sounded like you wanted to pursue some serious engineering.

 

[preston]

i want to experiment with a longer board and put a small hook on the end.

 

[mike4947]

IIRC back when they were discussing a new daggerboard the "correct length" for optimum sail to foil area would have been apx 10 inches longer than the stock wood dagger board.
It does mean being a LOT farther from shore before launching and the with few prototypes folks had a real problem downwind and beaching/launching. So the current plastic length was the compromise.

 

[DanB]

If it's important the board could be wider instead of longer to achieve the same surface area. Naturally, the slot would need modification.