If we set LBRC 22 the longitudinal and transversal stability will come very near to the same value.

Catamaran hull beam. If the hulls are asymmetric above waterline this is a sum of outer hull halves. Wide hulls and a large overall beam will increase the overall righting moment of a catamaran. A word of caution.

The cross beams have to resolve the moment without undue flexing. Fortunately its very easy to check the strength of catamaran beams once youve built them. Not to be confused with Kattumaram.

Hull length-to-beam ratio LwlBh This ratio is the measure of hull slimness at the waterline which is significant for performance. But since most multihulls have similar DepthWL beam ratios you can pretty much say the SLR equates to the LWLBWL ratio. LBRC LH BCB.

We still need to determine the beam of one hull B H1 Figure 4. What its used for Performance Larger LB indicates a slimmer hull. Shorter hull spacings would lead to the appearance of steep waves beyond the capabilities of the present linearized model.

This is because boats with waterline length to beam ratios greater than 81 are not limited by hydrodynamic drag factors whereas smaller boats need to plane to do so planing requires enormous amounts of power for displacement hulls. Good catamaran cruisers have values from 8-12 racers from 12 to significantly higher. You need to know that the waterline length of one hull divided by the beam of one hull is 12.

Definition LB length divided by beam. The suspension arms are pivotally connected with offset spaced connections to the bridgedeck and to each of the hulls for moving said hulls from a substantially horizontally locked position to a vertical position beneath the bridgedeck while. Usually the waterline dimensions LWL and BWL are used for monohulls or for a single hull of a multihull.