When in reverse pitch, CTM will tend to move the propeller blades towards
- a positive pitch.
- a position depending on rpm.
- a negative pitch.
Explanation from PART66Online
The centrifugal twisting moment always urges the blade toward fine pitch, meaning a lower blade angle. Starting from reverse, which is a negative angle, this drive toward fine moves the blade up through zero toward a positive angle. The effect is independent of rpm direction sense, so it consistently acts toward positive pitch.
J
Jordi asked · 19 Jun 2020
i dont understand it.
Community Comments (2)
S
Sete1992
25 May 2022
Primarily Centrifugal Torque Moment (CTM) tends to move the blades to Fine blade angle or low pitch. So even if its in reverse it will do the same as well. When the blade goes in Reverse the blade angle is less than zero so it becomes negative pitch. The CTM will push the blade to fine making it to go above zero thus it becomes positive pitch. I hope that helps. Thanks.
J
Jordi
9 Jun 2022
thank you very much my friend.
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