Darrieus VAWT - Wendel/S

Old water bottles are a huge environmental problem in several areas of the world. Those bottles are made of PET and are therefore not biodegradable. The good news are, that PET is (relatively) easy to recycle. Against this background, I designed a vertical axis windturbine (VAWT) for my master thesis. The requirements for this turbine are:
- printable with a "standard" Desktop-3D-printer (in this case a MakerBot 5gen)
- all parts necessary should be available in developing countries
- cheap