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Re: Bat rolling, and shaving. Really???
NSA has decided to go with a similar ball next year for all NSA play. (.52 C.O.R. and 275 lb. compression)
Welcome to the SSL @ WSU (source)
Consider two balls of the same COR but made in a way that they have different hardness (or compression). Next allow these two balls to impact the same hollow bat. Upon impact the harder ball will produce more barrel deformation and consequently less ball deformation than the softer ball. Essentially the harder ball exchanges some of its ball deformation (which dissipates energy) with barrel deformation (which does not dissipate energy). It is for this reason that the batted ball speed generally increases with increased ball hardness and decreased barrel hardness. Note that the trampoline effect is negligible for bats with very stiff barrels. These may include hollow bats with thick walls or solid wood bats.
What do you mean by restricted flight? Wiffle balls are a type of restricted flight ball...
Prior to 2013, the standard ASA 12" SP ball was .44 COR and 375# compression. The new ball is .52 COR (livelier) and 300# compression (softer). I checked with SoCal ASA about the new balls and this is what they had to say:
We have been using this ball for 3 years now and it is awesome. It is a great ball as it takes the altered/hot bats out of play.
NSA has decided to go with a similar ball next year for all NSA play. (.52 C.O.R. and 275 lb. compression)
Welcome to the SSL @ WSU (source)
Consider two balls of the same COR but made in a way that they have different hardness (or compression). Next allow these two balls to impact the same hollow bat. Upon impact the harder ball will produce more barrel deformation and consequently less ball deformation than the softer ball. Essentially the harder ball exchanges some of its ball deformation (which dissipates energy) with barrel deformation (which does not dissipate energy). It is for this reason that the batted ball speed generally increases with increased ball hardness and decreased barrel hardness. Note that the trampoline effect is negligible for bats with very stiff barrels. These may include hollow bats with thick walls or solid wood bats.