One way a CSU propeller achieves higher efficiency than a fixed pitch propeller is byQuestion 33Select one:a.Increasing the propeller pitch as speed increases during a take-off to maintain a constant angle of attackb.Increasing the propeller pitch as speed increases during a take-off to increase the angle of attackc.Decreasing the propeller pitch as speed increases during a take-off to maintain a small propeller angle of attackd.Decreasing the propeller pitch as speed increases during a take-off to maintain a constant angle of attack
Question
One way a CSU propeller achieves higher efficiency than a fixed pitch propeller is byQuestion 33Select one:a.Increasing the propeller pitch as speed increases during a take-off to maintain a constant angle of attackb.Increasing the propeller pitch as speed increases during a take-off to increase the angle of attackc.Decreasing the propeller pitch as speed increases during a take-off to maintain a small propeller angle of attackd.Decreasing the propeller pitch as speed increases during a take-off to maintain a constant angle of attack
Solution
The correct answer is:
a. Increasing the propeller pitch as speed increases during a take-off to maintain a constant angle of attack
Here's why:
A Constant Speed Unit (CSU) propeller is designed to automatically change its blade pitch in order to maintain a constant RPM, regardless of the airspeed or aircraft attitude. This is achieved by increasing the propeller pitch as the speed increases during a take-off.
The reason for this is to maintain a constant angle of attack, which is the angle between the chord line of the propeller blade and the direction of the relative wind. A constant angle of attack is desirable because it allows the propeller to generate lift (or thrust in the case of a propeller) more efficiently.
If the pitch was not increased as speed increases, the angle of attack would decrease as the relative wind becomes more aligned with the chord line of the propeller blade. This would result in a loss of efficiency.
Therefore, by increasing the propeller pitch as speed increases during a take-off, a CSU propeller is able to maintain a constant angle of attack and achieve higher efficiency than a fixed pitch propeller.
Similar Questions
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