Originally Posted by
MajorTomski
Ah another diciple drinks the coolaid.
Been arguing spiraling slipstream is a myth that was created when "Stick and Rudder" was published.
The true exsistance of a spiral has never been proven.
Folks love to explain P factor as the source of the yaw, but the same folks ignore that the physical manifestation of P factor is higher velocity air flowing down the right side of the fuselage, BUT the result of the force from that increased lift is a pitching UP moment on the prop shaft.
The high speed air from P factor will have EXACTLY the same effect as the suposed spiral.
But if the spiral truely existed the aircraft a low airspeed and high alpha would roll to the right almost uncontrollably, which it doesn't.
P factor is A result or an increased angle of attack thus increased pitch on the downward blade when at high angle of attack and high power setting. One side of the prop has more bite than the other.
Are you saying that the air is faster on the left side(assuming clockwise rotation pilots view) causes some bernoullli effect of some sort.