|Doing the double propeller
one devilstick spins around the left handstick while another devilstick is
spinning around the right handstick. It's easier to turn the devils
assychron, i.e. both turn inside or both turn outside.
This trick requires
that you are able to do a propeller with your right hand as well as with
your left hand perfectly - without looking at it. The double propeller is
difficult because you can't look at both sticks at the same time. This is a
big difference to the tricks with one devilstick where you are using
hand-eye coordination !
Both-side ability and peripheral seeing are
the challenges for doing this trick. Most devilsticker doing the double propeller
turn the sticks outwards, I prefer to turn them inwards. Turning
outwards means to spin the right stick cw and the left stick ccw.