Don't Let It Bounce
Hall of Fame
The frequency at which the frame vibrates after the ball is struck varies according to frame stiffness. In Technical Tennis, Cross and Lindsey give these descriptions of frames they tested:
"most wood racquets" 90 Hz
"flexible racquets" 120 Hz
"medium stiff" 157 Hz
(this test frame was clearly, by description, a Triad of some sort)
"most racquets" ~140 Hz
"very stiff" 202 Hz
Does anyone know how of any translation table between Babolat RDC flex ratings and measurements of frames' vibration frequencies? (I mean something more precise than estimating from the verbal descriptions above.) It would have to be approximate, of course, since flex varies at different points along the frame.
In particular, does anyone know what RDC flex corresponds to 200 Hz (the point at which the frame vibrations are rapid enough to be damped by the ball itself)? It should be somewhere in the very high 70's or low 80's.
"most wood racquets" 90 Hz
"flexible racquets" 120 Hz
"medium stiff" 157 Hz
(this test frame was clearly, by description, a Triad of some sort)
"most racquets" ~140 Hz
"very stiff" 202 Hz
Does anyone know how of any translation table between Babolat RDC flex ratings and measurements of frames' vibration frequencies? (I mean something more precise than estimating from the verbal descriptions above.) It would have to be approximate, of course, since flex varies at different points along the frame.
In particular, does anyone know what RDC flex corresponds to 200 Hz (the point at which the frame vibrations are rapid enough to be damped by the ball itself)? It should be somewhere in the very high 70's or low 80's.
