Introduction |
  
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Introduction |
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Introduction
The Portable CT Pendulum Tower(referred to as CTM) is a club head testing apparatus approved by the R&A and USGA for measuring the Characteristic Time (CT). The CT describes the length of time that an object impacting the club face is in contact with it’s surface. The CT value is used to calculate the Coefficient of Restitution (COR) which describes how efficiently energy is transferred from the club face to an object it impacts. The R&A/USGA limits the COR of all club heads used in tournaments to be less than 0.830, which becomes 0.837 factoring in tolerances. In terms of CT, this translates to 239µs, which becomes 257µs after factoring in tolerances.
Over the years, there have been multiple methods of operating and setting up the CTM. This has led to a myriad of results that can’t be reproduced by different parties. This manual was written with that in mind.
This manual was not written to instruct the reader on how to operate the CT pendulum in a step-by-step fashion. Instead, this manual points out specific set-up parameters that will improve consistency across the supply chain and the golf governing bodies.