747 Directional Stability in the climb phase
Clean climb through FL230 experienced some light yawing in alternating directions, climb speed in the *270-280* kts range probably 15 tons below MTOW at this stage.
According to the check airman there is a Boeing paper on this phenomena.
Anybody familiar with this or is it hogwash?
He couldn’t tell me if this also occurred with the BCF/ERF with the extended upper deck.
My reasoning is that at a particular weight at a particular climb speed there is a aerodynamic effect from the upper deck hump that causes some yawing that is not sufficiently dampened by the yaw dampers.
Last edited by B2N2; 16th May 2022 at 10:32.