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Forum: Monohull Sailboats

09-07-2013, 10:27

Replies: 16

Relationship Between Sail Area/Displacement to Boat Speed

Views: 6,040

Posted By Adelie

Re: Relationship Between Sail Area/Displacement to Boat Speed

In general use sail area for SA/D is calculated from the main- and fore-triangles.
For the main that would be 1/2*P*E, the area of the roach is not included.
For the fore-triangle, 1/2*I*J, no...

Forum: Monohull Sailboats

09-07-2013, 08:20

Replies: 16

Relationship Between Sail Area/Displacement to Boat Speed

Views: 6,040

Posted By Adelie

Re: Relationship Between Sail Area/Displacement to Boat Speed

I mis-stated the formula above, it should be:

Average Daily Mileage = 24 * (2.62 + 0.066*SA/D ratio + 0.051*LWL)

JazzyO, for your Baltic 38DP I get 133 nm/d. The formula uses SA/D for main and...

Forum: Monohull Sailboats

08-07-2013, 21:36

Replies: 16

Relationship Between Sail Area/Displacement to Boat Speed

Views: 6,040

Posted By Adelie

Re: Relationship between sail area/displacement to boat speed

You are unlikely to average better than hull speed in a monohull in cruising trim. Loaded for racing, on a good wind day with the right boat, off the wind; sure no problem.

If you want to...

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