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• Based on the boat data table you collected: – Calculate the speed for planing boats by Barnaby/Levi and Grouch’s formula and compare it to speed measured or informed by manufacturer. Note: • One crew member is 85 kg • Add outboard engine to the mass of outboard boat (normally exclused) • Add fuel tank (1 kW of power ~ 1 kg of fuel)
For a displacement boat, speed is a function of waterline length. The maximum theoretical speed is ordinarily assumed to be 1.34 times the square root of the LWL. Speed to Length Ratio = Velocity in Knots Waterline Length = V LWL
Explain each of these resistive terms. Draw and explain the flow of water around a moving ship showing the laminar flow region, turbulent flow region, and separated flow region. Draw the transverse and longitudinal wave patterns when a displacement ship moves through the water.
The propeller design calculation consists of three steps: 1. Calculation of thrust and torque. 2. Check of risk of cavitation. 3. Determination of camber and pitch distribution. Calculation of thrust and torque. 1. Select propeller diameter and RPM. A Bp- diagram or experience might be used. 2.
2. Calculate the righting moment of a ship given the magnitude of the righting arm. 3. Read, interpret, and sketch a Curve of Intact Statical Stability (or Righting Arm Curve) and draw the sectional vector diagram of forces that corresponds to any point along the curve. 4. Discuss what tenderness and stiffness mean with respect to naval ...
Understanding and calculating marine displacement is essential for the design and operation of ships. This tutorial delves into the formulas and calculations associated with marine displacement, focusing on length, breadth, draft, and block coefficient.
structural assessment by the rules: displacement 3000kg, LCG (Longitudinal Center of Gravity) 2.8m , draft 0.45m and running trim 4° . (d) Apply rules to assess quasi static design pressure.
