Catamaran Design Formulas Catamaransite

Catamaran Design Formulas Catamaransite

Catamaran Stability Luxury Catamaran Long Island New York

Catamaran Stability Luxury Catamaran Long Island New York

Catamaran Configuration Indicating The S L Ratio Download Scientific Diagram

Catamaran Configuration Indicating The S L Ratio Download Scientific Diagram

Catamaran Hull Design Catamaransite

Catamaran Hull Design Catamaransite

Optimising Hull Lines For Performance Grainger Designs Catamarans And Trimarans

Optimising Hull Lines For Performance Grainger Designs Catamarans And Trimarans

Catamaran Design Guide Catamarans Guide Boat Plans

Catamaran Design Guide Catamarans Guide Boat Plans

Catamaran Design Guide Catamarans Guide Boat Plans

For the purposes of modelling the thrust force on the sails details of the rig from the original hull are used.

Catamaran hull ratio. Beam WL Hull Fineness Ratio Max. With explanations of the various design ratios publishing one a week. And if I bring the aft end width down to 16 inches the hulls then have a LB ratio of 301.

If I go with a 40 length and a 201 LB ratio each hull will be only 2 wide at the transom. WL length of the hull at waterline in ft. With such wide aft hull ends the boat will have a lot more buoyancy than I need.

Hull Fineness Ratio HFR The Hull Fineness Ratio known as the hulls beam-to-length ratio is an interesting number. What its used for Performance Larger LB indicates a slimmer hull. Definition LB length divided by beam.

Beam WL beam of the hull at the waterline in feet. P m 4 x m LDC 1025P m 28. See figure 26 242 Discussing hull shape.

The Prismatic Coefficient Cp is a measure of the fullness of the ends of a boat the higher the number the fatter the ends and - surprisingly - the more efficient at high speeds. Finer hulls are more efficient at high speeds but as weve just seen suffer from more WSA and so for normal cruising catamarans in average conditions a ratio of 111 - 131 seems optimum. Hull length-to-beam ratio LwlBh This ratio is the measure of hull slimness at the waterline which is significant for performance.

This puts me far beyond that LB ratio in the teens that you mentioned. However this drag formula is generally not the limiting factor for catamaran hull speed. Most modern catamarans have a LWL to Beam ratio of about 81.

Longer Amas And Increased Beam

Longer Amas And Increased Beam

Catamaran Efficiency Sailing Catamarans Long Island Ny

Catamaran Efficiency Sailing Catamarans Long Island Ny

Optimising Hull Lines For Performance Grainger Designs Catamarans And Trimarans

Optimising Hull Lines For Performance Grainger Designs Catamarans And Trimarans

Catamaran Stability James Wharram Designs

Catamaran Stability James Wharram Designs