This is a great rainy day project: making ribs for your solar collectors. You'll need quite a few of them once you've decided to sc...

The hard work of building a solid frame for up to 12 reflectors is pretty much finished now. I'm watching the concrete footings dry in ...

The DIY parabolic heater uses thin sheets of reflective material gripped along the two long edges in a ribbed frame shaped like a parabola. ...