Originally Posted by
Mr Good Cat
A similar movement of the ailerons (or more specifically a similar roll demand) on the 737 requires a much bigger input of roll on the yoke. There is also a larger dead band on the 737 which has to be overcome. The 777 also has a much larger momentum, which means that it isn’t disturbed by gusts as much (even though you can sense them). If you handle the yoke in a similar way to a 737 on the approach you will just end up waggling the wings a lot, like in the video. As you then counter the ‘waggle’ with an opposite large roll input you’ll just end up in PIO.
I think this may be it. If I'm not mistaken, they also operate 737's. I've seen videos of some pretty significant control displacements in 737's on approach, so perhaps that could explain it.
Thanks to all who shared their experience.