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| 1. Stability and Trajectory Stability and trajectory are carefully controlled and all shuttles that are not up to standard are either rejected or down-graded. Stability and trajectory are controlled by an exact hitting speed and hitting angle to minimize deviant shuttles and provide a higher and more stable quality. 2. Speed The speed of the shuttle is tested in a highly controlled environment. A set temperature, measured humidity, exact same hitting speed, and and a set angle, give a correct flight distance within +/- 15 cm. Different temperatures and humidity percentages are used to simulate different playing conditions, all to ensure that the shuttles will work properly no matter where you play.  3. Quality and play testing of shuttle From each batch of shuttlecocks samples are taken. These shuttles are put through very hard play-testing. This to see if the shuttle meets the quality standard of its grade. After the play test, the shuttle is re-examined. The feathers, stitching, glue, and cork are checked to see how they are affected by the stress of hard play. After this is done the stability and trajectory are once again checked to see if these have changed during play. 4. Quality and play testing of cork The quality of the cork is carefully controlled to guarantee that the cork is of top quality. Age, density and weight is checked for each shipment of cork. The play characteristics of the cork is tested by experienced players to make sure that the cork gives the shuttle the natural behaviour in play that it must have to be suitable for high level play. |
Appropriate speed for FUKUDA feather shuttlecocks
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