Final answer:
Flutter dampers are generally related to the aeronautics industry, not building elevators. Tall buildings, such as the Comcast Building, use tuned-mass dampers like a 300,000-gallon liquid-column mass damper to stabilize the structure against oscillations.
Step-by-step explanation:
Flutter Dampers and Elevators
The question about how many flutter dampers are installed on each elevator seems to be slightly misdirected as flutter dampers are typically used in the aeronautics field, specifically on aircraft control surfaces to prevent aerodynamic flutter. However, if we consider the term 'elevator' in an aeronautical context, then flutter dampers might be mentioned. In the context of buildings, however, the question would likely refer to a different kind of damping system used to stabilize oscillations in tall structures. For example, in the Comcast Building, a tuned-mass damper is employed to mitigate the oscillations caused by seismic activity and winds. Such dampers, like the 300,000-gallon tuned, liquid-column mass damper at the top of the Comcast Building, are designed to match the natural frequency of the building and reduce oscillations by tuning t