The 'Hurricane Balls' consist of two ball bearings welded together - no easy task! If you spin the Hurricane Balls on a smooth surface, you can use the plastic pipe to blow at one side of the Hurricane Balls. Not only does this keeps them spinning, you can accelerate them up to incredible speeds. Speeds of 12,000 rpm have been recorded for the Hurricane Balls using a laboratory strobe light.
In the home, it is possible to use a tv as a simple stroboscope. Dr Adam Chalcraft writes "I can easily get a speed of 3600 RPM, and more to the point I can easily measure this, by putting the top in front of my (NTSC) TV in a dark room. As it runs down, I can clearly see 60Hz, 30Hz, 20Hz and so on. Of course if you try it in front of a PAL TV (in the UK) you will see 50Hz, 25Hz and so on." Thanks for that, Adam.
Any smooth surface will work for spinning on, but the very best is a concave mirror, e.g. those round, magnifying bathroom mirrors. We do not supply the mirror, as these are fragile to post, and are readily available everywhere.
Once the Hurricane Balls are spinning, you can then use the coloured LED torches to illuminate them, with different colours at different angles. In a darkened room, the effect is magical!
Included in the pack is 1 set of Hurricane balls, 3 LED torches of different colours, and a plastic tube to power the Hurricane balls with! Please note that the LED torches are now of a different design to the ones we show in the video.
Made in EU
Unfortunately this item is no longer available, as the man who made the actual hurricane balls is sadly no longer alive. However we now stock a very similar product called Tornado Spheres. See http://www.grand-illusions.com/acatalog/Tornado-Spheres-706.html