Originally Posted by
Hot and Hi
Really! Every day I learn something new.
Fact remains that GR avoidance is not taught to Robinson pilots, as it is not a concern on this type.
In a 3-blades system a blade will drag independently of the other blades, it will displace the rotor system center of mass and create a lateral oscilation.
GR is when that lateral oscilation (undamped) comes in counter phase with fuselage oscilation.
In a 2-blade system, when a blade wants to drag back the other wants to drag forward, an about equal amount, because they are on oposite azimuth, thus the rotor system center of mass can hardly move I assume.
from a theoretical perspective, if blades we let to drag independently in a
teetering head they have the power to displace the center of mass much more, is that why it is more suseptible ?...