Jeez, Vessbot, I hope you are just being a troll and that you don't actually believe in helicopters having precession.
"Precession" is an easily accepted idea that it takes time for the force of a control input to accelerate a blade mass and make it move to where you want it, and while that time is elapsing, the blade is rotating around the mast. Usually it takes between 72 and 90 degrees of turn before the rotor gets to the desired position, but by then it is already receiving signals to get back to where it was, or go even further the other way.
A gyroscope it ain't. And it doesn't take exactly 90 degrees to take effect, like a real gyroscope would. The late Lu Zuckerman, when shooting down the Gyroscope Gang, would ask "where is the missing 18 degrees?" when he spoke of the R22, which displayed a phase lag of 72 degrees.