How to Build a Windmill

A windmill is a device used to change wind energy to useful power through the use of a rotary movement and variable vanes or sails. Windmills were originally employed for grinding grain however, as people have changed to more interested with protecting the environs and discovering sources of environmentally friendly power, windmills have increased in fame.

You might think constructing a windmill of your own is too expensive but you have nothing to be concerned about since you can build a windmill yourself for approximately $200 and the long term savings a windmill will give you will be well worth it. So if you are curious about building a windmill of your own here are a couple tips for assembling a windmill around 5 feet tall.

How To Build A Windmill

Required Tools




Required Materials

cement and sandbags

Plastic PVC pipes

Nuts and bolts


A generator


A mounting

Batteries and an electronic control system

2×4 board


Heavy sheet aluminum


As with many other things you can procure windmill blueprints or kits to lessen your work. The plans will give you intricate steps for building a windmill and will include a exhaustive database of required items to construct a windmill. A windmill kit will entail plans as well as all the materials you need to make the windmill so you will require nothing but a few tools. If however, you opt to make a windmill with no extra assistance then here is what you have to do.

Let’s begin with the generator; some persons prefer to make their own generator but an easier alternative is to purchase a permanent magnet DC motor. You want a motor which will create good current at a low rpm level; a 30 volt motor rated at 325 rpm ought to turn out around 12 volts thus a motor like this would be ideal.

For sails/blades you may buy pre-made blades or create blades out of wood, aluminum or PVC pipe. To see just how you need to cut the PVC pipes visit one of the websites online such as that will give you precise guidelines on what to do. Once you have cut out your blades using a saw, use the sander to smooth the edges of the blades to make them even more efficient.

You will need a hub to bolt the blades to and to secure the motor to, just about any flat disk about 5 inches in diameter will do. Drill 2 holes, one below the other through the blades and drill matching holes into the hub, next use the nuts and bolts to fix the sails to the hub.

The windmill segment is now complete however, you need a mount to secure it to. Strap the motor to one end of the piece of 2×4 board and use a piece of PVC pipe to cover the motor so it is shielded from rain. Lastly fix the heavy sheet aluminum to the opposite end of the 2×4 board to work as a tail for the windmill.

For a tower use a PVC or aluminum pipe; bury it in the ground and concrete it into position, use sandbags to additionally secure the tower in position and then place the windmill on the tower.

Purchase a wind power control system for moving energy from the windmill to the batteries, from any Alternative Energy store. You need electrical cables to connect the windmill to the power control; run the cables from the windmill down through the tower and join it to the power controller. Now it’s time to try out your windmill.


Bear in mind that the taller a windmill is the more wind it will catch. As such you want your windmill to be above any potential obstacle.