Composite position: outer versus inner

The previous section surveyed the available fibres and closed with a warning: the effect of any of them depends on where it is placed within the sandwich of plies. A sheet of ALC beside the surface produces a different blade from the same sheet of ALC beside the core. The fibre is identical; the position changes everything.

In a composite blade of five wooden plies plus two sheets of fibre — the most common configuration — the wooden plies follow the classic scheme: outer, intermediate, core, intermediate, outer. The two composite sheets are inserted symmetrically on either side of the core, but the exact point of insertion varies. If they are placed between the outer and the intermediate plies, the blade is classified as outer. If they are placed between the intermediates and the core, it is an inner. The difference in position is a few millimetres; the difference in behaviour, a good deal more than that.

Outer: composite near the surface. The sheet of fibre is separated from the rubber only by the outer ply of wood, typically between 0.5 and 1 mm thick. In that position the composite intercepts the energy of the impact almost immediately: the ball strikes, the rubber compresses, the outer ply transmits and the fibre responds before the deformation reaches the core. The result is a fast, direct blade with little flexing. The dwell time — how long the ball stays on the surface, covered in 2.5 — shortens because the structure barely yields. The vibration reaching the hand is brief and dry: information compressed, not absent, but with less gradation than on an all-wood blade. The player perceives an immediate, almost impatient response: the bat does not wait, it pushes.

Outer blades dominated the first generation of composite bats and remain the choice when maximum speed with a linear response is wanted. The specific models are dealt with in 10.4.

Inner: composite near the core. Moving the fibre inwards interposes two plies of natural wood between it and the rubber — the outer and the intermediate — instead of one. Those additional plies act as a filter: they absorb part of the impact, flex and transmit to the composite an energy already damped. The fibre still contributes stiffness and speed, but its effect arrives attenuated, later in the chain of deformation.

The practical consequence is a longer dwell time than on an outer blade of the same fibre, a richer vibration and a touch many players describe as intermediate between all-wood and composite. The bat is still faster than an all-wood one, but the sense of contact is closer to what was described in 9.1: there is perceptible flexing, there is graduated feedback, there is room to modulate the stroke. The speed does not disappear, but it arrives less abruptly.

Inner blades are a more recent development and answer a specific demand: composite speed without giving up the feeling of all-wood entirely. Their appearance widened the spectrum to a point where the line between a soft inner — pure arylate beside the core — and a seven-ply of hard wood blurs. The reference inner models are detailed in 10.5.

The choice between the two is not a question of quality but of priority. Whoever puts direct speed, consistency between strokes and a response that does not ask to be thought about twice tends towards outer. Whoever puts touch, variety of stroke and a less abrupt transition from all-wood tends towards inner. The fibre chosen — ALC, ZLC, pure carbon — qualifies that difference, but does not reverse it: an outer ALC is still more direct than an inner ALC, and an inner ZLC is still more sensitive than an outer ZLC. Position rules over fibre as far as feeling is concerned.

The position of the composite is, alongside the type of fibre, the second variable that defines the character of a blade with synthetic material. How each configuration interacts with the rubbers on the assembled bat is the territory of chapter 11, and section 12.3 places the outer/inner choice within the modern attacking profile. Ignoring the position is like choosing a rubber by hardness without asking about the thickness.