PPRuNe Forums - Difference between Helix and Blade angle?!?!?

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AlexanderH

10th Mar 2010 17:28

Difference between Helix and Blade angle?!?!?

Bit stuck with this one. Pooley's book explanation is difficult to understand. Can anyone explain this to me in plain English?

Keith.Williams.

10th Mar 2010 19:01

Blade Angle is between the chordline and the plane of rotation.

Angle of Attack is between chordline and relative airflow.

Helix Angle = BLade Angle - Angle of Attack

Helix Angle + Angle of Attack = Blade Angle.

AlexanderH

10th Mar 2010 20:39

thank you.

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