Viscous pendulum damper Patent
Mercury filled pendulum damper for controlling bending vibration induced by wind effects
Engineering topics
Publications and source records attributed to Reed, W. H., III.
Mercury filled pendulum damper for controlling bending vibration induced by wind effects
Hanging-chain system, which is a form of impact damper, suppresses wind-induced bending oscillations of tall cylindrical antenna masts. A cluster of chains enclosed in a neoprene shroud is suspended inside the tip of the antenna mast, forming a simple method of damping structural vibrations.
Oscillation dampers for tall flexible structures, describing wind tunnel studies of Saturn 5 aeroelastic model
Oscillation damping of tall structures by hanging chains
Viscous dampers for suppressing wind-induced oscillations of large flexible structures, antenna arrays, and Saturn 5 launch vehicle
Propeller-rotor whirl flutter and effect of hinged blades and flexible twisted blades
Free flight suspension system for use with aircraft models in wind tunnel tests
Physical and mathematical models to simulate effects of ground winds on erected launch vehicles
Propeller rotor whirl flutter and instability in conventional and Vertical Takeoff and Landing /VTOL/ aircraft
Physical and mathematical models for studying erected launch vehicle response to ground winds
The viscous pendulum damper consists of a cylinder containing round trays on which round lead slugs rest. When assembled, the container is filled with a viscous liquid and attached, with axis vertical, to the structure. The device permits varying the damping of structural vibrations.
A simple anemometer having a fast response to high frequency wind fluctuations by direct measurement of two drag-force components in orthogonal planes is described. It may be used to determine wind profiles to extensive heights and would be helpful in takeoff and landing of light planes.
Propeller whirl flutter conditions peculiar to v/stol aircraft and the related problem of the response of propeller-nacelle system to random atmospheric turbulence
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