My portable Copenhagen solar oven. To the right is the photo showing it put together -->
Here is my new fire piston (photo far left), or at least one of them. On the near right is the glowing ember it produced from the homemade char cloth that I made. Sorry it is so out of focus (hard to do one handed).
A penny stove burning isopropyl (so you can see the flame in daylight).
Thermal image showing spots where the insulation is missing in the attic.