Originally Posted by
stilton
Thanks for the very informative replies, this characteristic does seem more pronounced on some types than others
One poster indicated this can be ‘engineered out’ to some extent ?
I would think that would be desirable and something all helicopter manufacturers would strive for ?
One other thing, does this slight angle of bank while hovering require a small cyclic input or is it ‘built in’ with a centered cyclic maintaining the bank ?
All of the above. Some designs have a mast tilt, some have rigging solutions. The Bell 407 has a mast tilt and an interconnected linkage that couple fore and aft cyclic with lateral input. These designs, like other design solutions, have to compromise between hover performance vs. cruise flight performance.