See more at laesieworks.com/ifo/index.html
In may 2011 we (Giesbert Nijhuis, Alex Baumgart, and friends) build the third type of curved vortex machine, to discover if it is possible to lift a craft with the end of a curved vortex. The second type was curved 180º, and this third type only 90º, to reduce the weight and size of the construction, while keeping the total amount of power equal.
We are already working on new curved vortex machines. When ready, I'll post it on YouTube and my site. If it really works; please remember you saw it here for the first time!