Deadrise: a standalone construct

Naval architecture

The V-angle of a hull bottom off the horizontal

In naval architecture, deadrise is the angle that a hull's bottom makes with the horizontal as it rises from the keel toward the chine, the measure of how much 'V' the bottom has. A flat bottom has little deadrise and plenty of lift but pounds in waves, while a deep-V with high deadrise rides more softly through a chop at the cost of lift and stability at rest; deadrise often varies along the hull, deepest at the bow. Faltinsen's Hydrodynamics of high-speed marine vehicles treats deadrise in the hydrodynamics of planing hulls. The referent is a transverse hull-form angle that governs lift, impact loads, and ride for fast boats.[1]

Unit: Angle (degrees) between the hull bottom and the horizontal at a section
Recovery means: Not applicable
Measured by: Read from the body plan as the section bottom angle, and used in planing-hull lift and impact calculations

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deadrise: a standalone construct

Naval architecture

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