Translational Lift & Effective Translational Lift - Knowledge Check

Question 1 of 5

1. Question

What is the primary way translational lift increases rotor efficiency?

By increasing the pitch angle of the blades

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By reducing induced flow

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By increasing rotor RPM

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By increasing air density

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Question 2 of 5

2. Question

Which of the following helicopters are experiencing translational lift? (Select all that apply.)

A helicopter in a stationary hover over the ground with a 10 kt tailwind

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A helicopter in still air moving sideways at 10 kts

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A helicopter in a stationary hover in no wind

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A helicopter in forward flight at 60 kts

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Question 3 of 5

3. Question

Fill in the blanks.

Effective translational lift occurs at roughly Fill in the blank 1 of 2 to Fill in the blank 2 of 2 knots.

Question 4 of 5

4. Question

Match each sign of reaching ETL to its cause.

Sort elements

Increased lift production
Increased tail rotor efficiency (translational thrust)
The end of transverse flow effect

The helicopter wants to climb

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Right pedal is needed

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The helicopter stops shuddering

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Question 5 of 5

5. Question

On a slow approach, you decelerate below ETL while holding the same collective setting. What should you expect?

The helicopter will sink, because power required increases significantly

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The helicopter will climb, because the rotor becomes more efficient

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Less power will be needed, because parasite drag decreases

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Nothing will change, because collective hasn't moved

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Translational Lift & Effective Translational Lift - Knowledge Check

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