Quote:
Originally Posted by beatr911
Craig Vetter also mounts his license plate, light behind the helmet. Between the helmet and plate is a concave foam pad that is formed to the shape of the helmet. He stated that in certain cross wind conditions placing his "bowling ball" head in the foam socket restored stability. He didn't mention wind noise reduction but it would certanly transfer the drag of rear of the helmet to the tail fairing making less strain on the riders neck.
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It'a about inertia and leverage. Leaning forward a little and not being "fixed" to the bike allows the bike to push over some in the wind. The riders upper body pivots at the waist approximately and the bike is allowed to rotate freely; or at least relatively so around that "unattached" mass.
Consider 2 weather vanes; 1 with weights close to the axis of rotation and the other with duplicate weights but mounted much further out from the center of rotation; so both vanes are of equal weight. The first one swings easily in the wind because of the mechanical advantage of leverage that the vane provides by having more of the mass closer to the pivot axis. The wind is not as effective at moving the other because it does not have as much of that mechanical advantage and has to overcome the inertia of the mass that is further away from the pivot axis. A body at rest tends to remain at rest; a body in motion tends to remain in motion unless or until acted upon by an outside source...... Elementary dear Watson, elementary.