deadrise

2015.11.09

What is the connection between soft ride and fuel consumption?

A boat can be made softer in waves in a variety of ways. However, each method leads to other effects:

  • Less beam (decreases stability, increases hump speed and limiting space)
  • Adding weight (linearly increasing fuel consumption)
  • Increasing deadrise angle (increasing fuel consumption)
  • Using Petestep technology (decreasing fuel consumption and quieter ride)

Decreasing the beam is often not a good idea because decreased stability and space is never desirable. To achieve a reduction of vertical acceleration (hardness of ride) by 30% using conventional technology by adding weight or increasing the deadrise angle, around 50% more energy is required and hence, 50% more fuel consumption.

Petestep technology always gives a boat a significantly softer ride, and/or significantly lower fuel consumption. We can make a boat ride over 30% softer, while also reducing the resistance by 5-10%. Compared to a boat with similar softness using conventional technology, resistance is now reduced by over 35%.

2015.09.15

Deadrise angle

Deadrise angle, or V-bottom angle, is the transversal (sideways) angle between the horizontal plane and the v-bottom surface. A large deadrise angle, e.g. 24 degrees, makes the boat ride softer in waves but less sideways stable and more fuel consuming.