Engineering, 05.10.2019 14:30 122333444469
Amodel of a sailing yacht is towed with a small angle of attack, or leeway angle, about the vertical axis. the drag force and side force are measured separately. if the yacht hull operating in this manner can be regarded as a vertical hydrofoil in the presence of the free surface, what are the appropriate scaling laws to apply to each force component? distin- guish between parameters that should be scaled in principle and those that would be most important in a model test. in fresh water (15°c), towing- tank tests of a model 2 m long with wetted-surface area 1.5 m² give a measured drag force of 10 n and a side force of 28 n at a speed of 1.4 m/s. what are the corresponding full-scale results for a yacht 10 m long in salt water (15°c)?
Answers: 3
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
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Engineering, 04.07.2019 18:10
During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false
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Engineering, 04.07.2019 18:10
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
Answers: 3
Engineering, 04.07.2019 18:20
The characteristic roots of a dynamic system are: 1.7920 1.8160 i, -1.7920 1.8160 i, -0.4160 what is the order of this system? what are the settling time and damping ratio of the system?
Answers: 3
Amodel of a sailing yacht is towed with a small angle of attack, or leeway angle, about the vertical...
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