High Nose Rocker Can Cause Catapults on Flat Bottom Surfboards

Displacement rule: "Vessels move through water by displacing water." Vessels push water aside, taking the place of water it displaces. Speed boats and surfboards initially follow this rule, but; have the ability to rise on the surface and move with hydrodynamic lift. Water hinders movement and restricts speed on hulls that extend below the surface. A speeding vessel cannot move through water optimally, but can move on it. The water line differentiates movement in water from movement on water. Increasing speed, increases the pressure applied on water. When speed is increased, water does not have time to move out of the speeding vessel’s path. When water cannot move or be displaced, i

Semi-Displacement Surfboards

Most surfboards have flat undersides from nose tip to fin area. Tail designs vary with flat, Vee or concave shapes. The forward section of the surfboard under the nose bend, is called the bow in boats. In boats the bow parts water pushes out of its path. In surfing, the bow takes impact in air drops, dives and vertical aerial maneuvers. High impact on the nose rocker bend produces an abrupt stall, that pitches surfers through the air. The flat bow section produces lift by resisting water penetration. The stall, which occurs both on the surface and below, is called a pearl dive. The resistance is hydrodynamic force, which supports a surfer on the water and abruptly stops him with pre

Descending Into Liquid

When you dive into water, it cushions you and absorbs your energy. Your body pushes water out of your path and energy is transferred to water in the form of waves. You generate waves, slowing and descending deeper until your energy dissipates. Descent into liquid is only possible, when water has time to move out of your way. Should you fall into water from a ledge several hundred feet high, you will hit water carrying great speed. Water cannot move out of your way in time to allow penetration. You will momentarily stop on the surface, blocked by water until you decelerate. Water can not absorb your impact, instead your body takes the crushing blow. Depending on how you land, you may s

Science of Walking on Water

The closest a man or woman has gotten to walking on water, is by water skiing barefoot. The difference between a walker and skier, is speed. If someone stepped off a speed boat moving very fast, he may manage a couple of steps. Of course, this would not end well and may result in serious injury. Water is like wet cement to speeding bodies and objects, due to hydrodynamic resistance. It is this property that makes surfing possible. Water resists deep penetration by speeding objects. A small platform or bare feet, will support a rider with speed. This platform may be in any form that resists deep water penetration. A flat bottom produces the best results. The platform acts as a wing

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