Control input during loop

Vlado,

Rudder? Rudder? I thought you only used that thing on the ground
g.

My understanding is gyroscopic precession. When the tail comes up on
takeoff on clockwise rotating props the force applied to the rotating
prop is forward at the top, aft at the bottom, so it reacts 90 degrees
around the plane of rotation, and thus causes a left turning tendency.
On the pull up for a loop, the effect is reversed, requiring some
left rudder. Seems to be the case on the Citabria and Decathlon as
well.

You going to park it for the winter as you used to do in AZO?

Warmest regards,
Rick

(MLenoch) wrote in message ...
I must admit, for years I have been doing such but never asked why. Why do I
need to use left rudder to keep the nose straight during a loop? I have a US
airplane, with normal prop rotation. If I do not use left rudder, the nose
will yaw to the right. This is not due to P-factor?
Thx in advance.
VL

You going to park it for the winter as you used to do in AZO?

Warmest regards,
Rick

Warm regard - winter............Its a joke right!!

(Yes, I'll be at AZO.)
Thx,
VL