Use double quotes to find documents that include the exact phrase: "aerodynamic AND testing"

In 2016, after a season of controversy, the World Curling Federation (WCF) and Canada’s National Research Council (NRC) investigated the effects of curling brush head technology on ice surfaces and their potential effects on where stones come to rest. During three days of testing, the NRC’s ice and materials technologies experts analyzed various manufacturers’ broom heads, assessing the distance, path, speed, acceleration, and rotation of a stone as it travels down a sheet of ice. The results of the testing brought about welcome rule changes to ensure that training, skill and strategy – not simply equipment – determine success on the curling ice.