Measuring Characteristic Time in Clubs of all Lofts

An update on the proposal to routinely measure the 'spring-like' effect of all clubs of all loft (excluding putters). Whilst the application of the current limit and testing method with the modified pendulum remains pertinent to clubs such as fairway woods and hybrids, it would be overly penal for iron clubs. In conjunction with the USGA, the R&A has developed a revised method for measuring the ‘spring-like’ effect of irons using the modified pendulum which de-lofts the club. The full text is shown in the attachment below.