Meucci Deflection Theory
Plus if you go on the meucci website and read the Original article on deflection it indicates the need for vibration to travel thru the cue and be uninterrupted!!
http://www.meuccicues.com/deflection.htm Here is a link to read for ones self!!! Thats why I like players cues cored because the vibration is uninterrupted by points cut into the center maple core interrupting the flow of energy thru the cue. The outer core channels the energe thru the cue and out the end.
Link is broken due to website changes but found this below!
Bob Meucci has an article on deflection you can read here:
http://www.meuccicues.com/deflection.htm
Here's a quote from that article that explains the phenomenon pretty well:
"Cue ball deflection occurs when the cue ball is struck off-center as when English or side spin is applied to the shot. This causes the ball to take a path off-angle, veering in the opposite direction from the side on which it was struck. In other words, strike the cue ball left of center and it will deflect off course to the right of the direction established by the alignment of the shaft.
"Cue ball deflection will vary from very little (1/8 of an inch in the span of 8 feet) to a whopping 1 1/2 inches in the same span. These variations are a result of three factors;
" 1. How far off center the cue ball is struck (left or right); the more off center,
the more deflection.
" 2. The hardness of the surface striking the ball (tip & ferrule) creating varying levels of shock.
" 3. How much force is used when the ball is struck. The more force applied by speed of stroke, the greater the deflection.
"Therefore, when selecting a cue for maximum deflection (which is highly undesirable in my opinion), get one with a stiffly-tapered shaft and a hard tip (13 1/2mm or larger). It should also have a very hard ferrule such as ivory or a phenolic resin type material and a stiff butt-joint such as steel.
"Strike the cue ball off-center 3/8 of an inch; hit it hard and you’ll get maximum deflection. The cue ball will veer off-path from the direction the shaft is pointed by 1 1/2 inches in an 8 ft. span, possibly missing the entire object ball!"
And further on, he writes:
"To test this for yourself, find a cue with a 13 1/2 mm stiffly-tapered shaft with an ivory ferrule or a very hard surfaced ferrule and a stiff joint. Put an object ball on the spot and the cue ball in the center of the table on the foul line. Strike the cue ball 3/8 inches off-center but keep the shaft on line or parallel for a straight-on hit. Hit the cue ball firmly and you will probably cut the object ball 90 degrees or miss the object ball completely. Perform the same exercise with a 4-point Meucci cue and you will cut the object ball off the straight line to the end diamond by no more than one inch, which would still be within the error allowed in a 4 1/2 inch pocket with a 2 1/4 inch ball."
So now you see what I mean about how my cue deflected the object balls badly. Believe me, the deflection was horrendous, so bad I avoided shooting any shots with any english at all unless the ball I was going after was VERY close to a pocket. The result was being limited to shooting center ball shots, which is fine as far as it goes. But sometimes, english is the only way out of a tight situation. Hence the more flexible shafted Meuccis help me pot more balls...
Hope this helps!
Best,