A golf gear fitting system (2) includes a swing data acquisition unit (21) to acquire swing data from a sensor (11) installed in a golf club (1), a swing data storage unit (22) to store the swing data acquired by the swing data acquisition unit (21), a data classification unit (23) to classify the swing data stored in the swing data storage unit (22), and a data prediction unit (24) to predict swing data of specifications not measured by the sensor (11) by referring to the swing data classified in the data classification unit (23).

The present invention relates to a racket, comprising a head region, a striking region, a throat region, a shaft region, a handle region, and a shear thickening material in the striking region, the shear thickening material being configured to exhibit shear thickening behavior when an impact occurs between the racket and an object.

A sport equipment includes a frame, comprising a hollow tubular structure and a plurality of rigid dividing elements disposed within an internal volume defined by the hollow tubular structure in separated positions along a longitudinal direction of the hollow tubular structure. The dividing elements comprises a side surface facing an internal surface of the hollow tubular structure, extend between transversally opposed portions of the internal surface and are rigidly connected to the opposed portions. The side surface contacts the internal surface of the hollow tubular structure and are connected thereto.

Articles for automotive, aerospace, manufacturing and defence industry applications including shafts or tubes used, for example, as golf club shafts, ski and hiking poles, fishing rods or bicycle frames, skate blades and snowboards are at least partially coated with an electrodeposited metal, metal alloy or metal matrix composite coating layer. The coating layer having a quasi-isotropic microstructure, a thickness of higher than 30µm and an average grain size between 0.004µm and 10µm. The coating layer provides articles of high resilience, high yield strength, scratch and wear resistance and hardness, and appealing appearance.

Fine-grained (average grain size 1nm to 1,000nm) metallic coatings optionally containing solid particulates dispersed therein are disclosed. The fine-grained metallic materials are significantly harder and stronger than conventional coatings of the same chemical composition due to Hall-Petch strengthening and have low linear coefficients of thermal expansion (CTEs). The invention provides means for matching the CTE of the fine-grained metallic coating to the one of the substrate by adjusting the composition of the alloy and/or by varying the chemistry and volume fraction of particulates embedded in the coating. The fine-grained metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling. The low CTEs and the ability to match the CTEs of the fine-grained metallic coatings with the CTEs of the substrate minimize dimensional changes during thermal cycling and prevent premature failure.

Lightweight articles comprising a polymeric material at least partially coated with a fine-grained metallic material are disclosed. The fine-grained metallic material has an average grain size of 2nm to 5,000nm, a thickness between 25 micron and 5cm, and a hardness between 200VHN and 3,000 VHN. The lightweight articles are strong and ductile and exhibit high coefficients of restitution and a high stiffness and are particularly suitable for a variety of applications including aerospace and automotive parts, sporting goods, and the like.