P-factor
Sign in to saveAlso known as asymmetric blade effect, asymmetric disc effect
Pfactor, also known as asymmetric blade effect and asymmetric disc effect, is an aerodynamic phenomenon experienced by a moving propeller, wherein the propeller's center of thrust moves off-center when the aircraft is at a high angle of attack. This shift in the location of the center of thrust will exert a yawing moment on the aircraft, causing it to yaw slightly to one side. A rudder input is required to counteract the yawing tendency.
~7 min read
Encyclopedic overview
7 sectionsContents
- Causes
- Effects
- Single engine propeller aircraft
- Multi engine propeller aircraft
- Helicopters
- See also
- References
Pfactor, also known as asymmetric blade effect and asymmetric disc effect, is an aerodynamic phenomenon experienced by a moving propeller, wherein the propeller's center of thrust moves off-center when the aircraft is at a high angle of attack. This shift in the location of the center of thrust will exert a yawing moment on the aircraft, causing it to yaw slightly to one side. A rudder input is required to counteract the yawing tendency.
== Causes ==
Excerpted from Wikipedia’s “P-factor” article, available under the CC BY-SA 4.0 licence.