Spring-Like Effect
A general term given to the faces of metal woods elated to how much the face compresses and decompresses (springs back) upon ball impact.
spring-like effect (also "trampoline effect") the "bouncing back" of a club's face contributing force to the shot, limited by the rules of golf (see also COR) ...
Several recently developed woods have a marked "spring-like effect" (i.e. a strong rebound of the ball from the clubface) resulting in very high ball speeds and great lengths of tee shots.
A perfectly elastic material has a COR of 1. COR is the method by which the USGA currently determines what it calls "spring-like effect". The USGA uses COR to regulate driving distance. The current limit on driver COR is 0.83.
 See also: Golf, Putter, Stroke, Swing, Rough
  
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