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A boat is equipped with two retractable rudders of width 0.75m and length 1m. The speed of the boat is 120km/h. 3.1 What is the skin drag on the rudders if transition occurs at Re = 5 x 105? The water is fresh water at 15°C. 3.2 After a whole season of use, the drag on the rudders were measured to be 8400 N. Calculate the roughness of the rudders.

A boat is equipped with two retractable rudders of width 0.75m and length 1m. The speed of the boat is 120km/h. 3.1 What is the skin drag on the rudders if transition occurs at Re = 5 x 105? The water is fresh water at 15°C. 3.2 After a whole season of use, the drag on the rudders were measured to be 8400 N. Calculate the roughness of the rudders.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A boat is equipped with two retractable rudders of width 0.75m and length 1m. The speed of the boat is 120km/h. 3.1 What is the skin drag on the rudders if transition occurs at Re. = 5 x 105? The water is fresh water at 15°C. 3.2 After a whole season of use, the drag on the rudders were measured to be 8400 N. Calculate the roughness of the rudders. HINT: Make an assumption and then check your assumption afterwards.
Transcribed Image Text:A boat is equipped with two retractable rudders of width 0.75m and length 1m. The speed of the boat is 120km/h. 3.1 What is the skin drag on the rudders if transition occurs at Re. = 5 x 105? The water is fresh water at 15°C. 3.2 After a whole season of use, the drag on the rudders were measured to be 8400 N. Calculate the roughness of the rudders. HINT: Make an assumption and then check your assumption afterwards.
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