Most Renewable Energy enthusiasts have a good grasp of how to use a PMDC Motor as a generator to make a DIY Wind Turbine but the sticking point is usually how to make a set of good wind turbine blades.
Below we will show you how it is done with cheap, accessible materials, for little or nothing.
PVC Wind Turbine Blades are becoming more and more common for homemade wind turbines. The raw material, PVC pipe, is easy to find, cheap, easy to work with, and performance is more than acceptable for a small basic wind turbine generator.
PVC wind turbine blades can simply be bolted onto a Permanent Magnet DC Alternator or suitable Stepper Motor and you already have a basic wind turbine.One of the most difficult parts of making your own wind turbine is producing turbine blades. Wind turbine blades go through enormous stresses and must be made to quite exacting tolerances if they are to balance and not send destructive vibrations through your wind turbine resulting in a catastrophic failure of your wind turbine.
In strong winds the flexibility of the PVC blades is useful as it takes some of the energy out of the wind preventing the wind turbine generator from excessive spinning (Overrun) and being damaged. Obviously you need to take care to ensure that the blades cannot bend back far enough to hit the wind turbine mast.Individual wind turbine blades can be cut out of the pipe using a jigsaw or hacksaw blade, or a one piece pair of blades can be made.
Below is an example design of a one piece (two blade) PVC wind turbine propeller.This design may be adapted with more turbine blades to fit a 3 blade or even 5 blade turbine configuration setup.