| A reduction in the blade section pitch angle towards the tip to reduce the chances of retreating blade stall. |
| The difference between the blade section pitch angle and the angle of attack at any point along the blade. |
| A reduction in the blade section pitch angle towards the tip to delay the effects of compressibility. |
| A reduction in the blade section pitch angle towards the tip to give a more even distribution of lift along the span of the blade. |
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