... so popular with the helicopter fraternity, inorder that any revisions should not destroy any of the vital qualities in this regard.One of the characteristics that we felt endeared the book to ... direction of the shaft, also exerts pitching and rolling moments.This force has the same magnitude as Z, so that, if hR is the height of the hub abovethe c.g. and eR is the distance of the hinge from ... control in both hovering andforward flight.18 Bramwell’s Helicopter Dynamicsthe plane perpendicular to the shaft. The swash plate is, of course, a plane of no-feathering, and the axis through...