In my Engineering class, my teacher told us that we had to invent or modify something and post it on the Instructables web site. I looked at three or four solar oven, and using their findings and ideas, I built the Ultimate SOLAR OVEN!
This Solar Oven is very cheap and easy to make. It uses around-the-house items that you use every day.
I hope you enjoy my solar oven.
Step 1: What you need!
-1 big box (You probably want it to be a square box that is bigger than 2 feet long)
-1 small box (It should also be square and 4-6 inches smaller than the big box)
-Styrofoam insulation (you can cut it up to fit in the big box)
-Black spray paint
-Glass (One person used glass from a broken scanner. It will need to be big enough to cover the box. You can also buy a sheet of glass and use a glass cutter to cut it so it has the right dimensions.)
-Tape or glue
-Sharpe (who says it can't be pretty)
-Baking rack (optional)
-If it isn't sunny, you can try a very bright light. It probably won't work as well.
Once you have gathered all the materials, you may go on to the next step...
Step 2: Paint and Dry
Step 3: Tinfiol in the Small Box
Step 4: Insulation
The first kind was the syrofoam insulation. I used half inch white stryfoam plate. I then cut them down to the length of you box. I should surround all 5 sides with no cracks. It is okay if there are cracks, but try to make sure there aren't any.
The second kind of insulation is newspaper. Place the small box in the bigger box. If the dimensions are good, there should be 1-2 inches on all sides of the boxes. Crumble the used pieces of newspaper and stuff them in the area. Make sure there are gaps between the newspaper. Those gaps will store the warm heat in the air pockets, which will make the oven warmer.
Step 5: Reflectors
The next step is to make the reflectors. One person said that unless you live near the equator, you must need these, or the solar oven wont work. Hopefully, you kept the tops of the boxes that fold over the top to close the box. You will then cover them with tinfoil. It is best to be kept at a 45* angle, although if anyone has any thoughts on how to keep it up, please tell me.
Remember to use the shiny side of the tinfoil, and the see-through tape.
Step 6: Glass
I used a big picture frame, and cut it down to its apropiate shape (My dad helped me with the sharp parts).
I am not going to tell you how to cut glass, so that will be part of your job to figure out how to cut it. It will probably tell you on the glass cutter, though.
Step 7: Clean and Protect
The way I did this was I put Super Duty Duct Tape on all the edges. I also put two layers on the corners there are no injury's.
After, I used glass cleaner on both sides to clean it so it is shiny. I recomend not spraying the cleaner near the tape; just incase the tape gets soggy and comes off.
Step 8: Rack's
An optional idea is that you can place a baking rack on the bottom of the oven. It would be better if all the sides cooked (top, bottom, and inside).
Step 9: Thermometor
My last suggestion to have a timer, and double the timing on your timer for a regular oven.