To: 212man
I used the term mass as it applies to the definition of a Newton. In this case mass = weight. What I was trying to imply is that the reflected weight of a rotor blade that weighs 234 pounds would due to centrifugal force be equal to a weight of 72,000 pounds measured at the offset hinge. This weight combined with the other blades creates a disc that has a polar moment of inertia of 360,000 pounds, which provides three things. 1) Stiffness of the blade and the disc. 2) Gyroscopic rigidity of the disc and, 3) the inertial energy to cause the blade disc to move when perturbed by an external force (control input).
Hopefully in this description I didn’t misuse some words such as polar moment…..
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The Cat