R
RayR
Guest
My point exactly....anytime you hit an object below center you will impart back spin on the ball....hitting below center will also create lift....they go hand in hand....this is regardless of the bat path....
In golf - you aim to strike the ball under the center which creates back spin....regardless of the club you are using....driver path will hit on the up path....irons you hit on the down path - but both hit under center....and all clubs create back spin because you are hitting below center....and guess what - the ball goes up....common sense regardless what our internet expert thinks....
[video]http://youtu.be/0mPAlrikWcw[/video]
In golf - you aim to strike the ball under the center which creates back spin....regardless of the club you are using....driver path will hit on the up path....irons you hit on the down path - but both hit under center....and all clubs create back spin because you are hitting below center....and guess what - the ball goes up....common sense regardless what our internet expert thinks....
[video]http://youtu.be/0mPAlrikWcw[/video]
He says that generally any great swing, e.g. a fast swing where the ball is struck on the good part of the bat, propelling the ball upward at a desirable angle, will likely generate the typical beneficial backspin.
From physics of baseball...
Balls hit for distance usually have appreciable backspin. About 2000 rpm.
Spin generates force perpendicular to motion, in this case basically upward, creating lift.
Lift means reduction in the degree of optimum hit angle. I.e. instead of hitting ball 45', 35' is more optimum.
Lift means ball in the air longer, which means more distance for the type of hits we are talking about.
However, there is a countering force, increased drag on ball due to spin.
Author calculates ball hit 385 without backspin, hit at 35' angle, would travel roughly 400' with 2000rpm backspin.
Author gives caveat that neither backspin or drag effect is precisely known, so his calculations aren't exact, but within a small error.
Later in the book the author states that backspin add distance to long drives at the rate of about 1 foot per 100 rmp of backspin.
A critical point is then made: according to the author, the batter has little control over the spin imparted on the ball (do we believe this?) He says that generally any great swing, e.g. a fast swing where the ball is struck on the good part of the bat, propelling the ball upward at a desirable angle, will likely generate the typical beneficial backspin.
A final note is that author claims that batters who attempt to groove their bat surface in order to generate more bat spin are in reality likely doing little