Answered: how is the propeller diameter affected?

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter47: Applications Of Formulas To Cutting Speed, Revolutions Per Minute, And Cutting Time

Section: Chapter Questions

Problem 40A: Compute the following problems. Express the answers to 1 decimal place. Use: T=LFN Cast iron, 312...

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Question

An ideal diameter d, in feet, of a ship's propeller is given by the formula

d = ch^1/5r^−3/5.

Here h is the horsepower of the engine driving the propeller, r is the (maximum) number of revolutions per minute of the propeller, and c is a constant. In both parts give your answer in terms of a percentage. (Round your answers to two decimal places.)

(a) If the horsepower is increased by 20% while the number of revolutions per minute remains the same, how is the propeller diameter affected?

The propeller diameter ---Select--- increases decreases by %.

(b) If the horsepower remains the same while the number of revolutions per minute is increased by 20%, how is the propeller diameter affected?

The propeller diameter ---Select--- increases decreases by %.

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