It can differ from shuttlecock to shuttlecock, but 10-14 days is a qualified bet. It’s not possible to measure the humidity of the ball itself. Therefore, we had to use primitive methods in our scientific test. The method was the following: weighing 100 dry shuttlecocks and compare them to the weight of 100 moisturized shuttlecocks. Years back, the term 49 – equivalent to 4.9 g – was used for a shuttlecock that was a bit slower than a 50 (5.0 g). Today, it’s the width of the tip and the skirt, which primarily determines the speed of the ball. For a normal and maybe a little slower shuttlecock the name could be ‘77’, and then ‘78’ for a slightly faster shuttlecock.
The consumption of shuttlecocks should be around 1-4 per game/training session with SAVE-BIRDIE humidity tube. This is extremely appropriate since you will take a shuttlecock from the top of the tube, use 1-4 per session, put 1-4 shuttlecocks back in the tube when you come home, and then they will have experienced the ‘acclimatization’ at the expected time they end at the top of the tube.
Is the humidity tube patented?
A patent application has been filed with the Patent and Trademark Office. PA 2013 00595. The application has no formal errors and an examiner is currently investigating whether the invention meets the required criteria. There is already another patent on a tube where you place a moisture sponge at one end of the tube, but it does not have an internal hygrometer.
The patent describes SAVE-BIRDIE as a moisture control tube with internal hygrometer for visual control of relative humidity with the aim of controlling the condition of the ball before it’s used so that the durability of the shuttlecocks increases considerably.
Why does a swan appear in the logo?
Feathers from gooses are used for the very best and most expensive shuttlecocks and usually duck feathers for the rest. Even though shuttlecocks made of goose feathers are the most expensive ones, it’s generally believed that it will be the cheapest solution in the long run due to the goose feathers greater flexibility.
And why a swan? Because SAVE-BIRDIE is a Danish invention and the swan is the national bird of Denmark.
Why is the word birdie included in the invention?