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(For this question use annex 081-031 issue date April 2006).
The correct sequence of cross-sections representing propeller blade twist is:
  • A
    sequence 3.
  • B
    sequence 4.
  • C
    sequence 1.
  • D

    sequence 2.

Refer to figure.
Blade Twist

Sections near the tip of the propeller are at a greater distance from the propeller shaft and travel through a greater distance. Tip speed is therefore greater. The blade angle must be decreased towards the tip to give a constant geometric pitch along the length of the blade.

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