/diy/ - Do It Yourself

>>819118
1. Build a box out of one-way mirrors, so you can see into the box, but whatever is inside can't see out
2. Put the sun into the box
3. Put your food / item you want to heat on top of the box
4. The food will be able to see the sun and start cooking, but the sun won't be able to see space and escape.

Easy! Just make sure to put the sun back once you're done using it.

>>819118
>>819120
Don't forget to wear sunglasses, the sun can be very bright. You don't rant to cook your eyes too!

What? you cant read that picture?

hopeless case

>>819118
>can some one tell how to make one of this please

Sure, just follow this picture.

>>819120
>one-way mirrors

Joke aside, don't use these (I've seen people use them before!) They will shatter. You need to use tempered glass for the inner glazing and then you can use normal glass for the outer glazing. Don't use more than 2 panes of glass and don't use mirrors. The mirrors will actually reflect more light and not work very well. Just normal panes of glass reduces sunlight by as much as 10% per pane.

With these 4-panel solar ovens, you always need to use 2 glazings and the inner one must be tempered glass.

>>819118
Build a well-insulated box. Essentially a box inside a box with about 2 inches of insulation between them. The insulation can be layers of cardboard, crumpled newspaper, old cloth, or actual fiberglass insulation. Make a lid access into the box and an angle-adjustable floor inside the box. Don't use the glass as a lid.

Use 2 panes of glass over the top with about 1/8" air space between them. The inner glass must be tempered glass or it will break in the heat.

The reflective panels are best made as Trapezoids, not rectangles. Then you can put hinges on them. You'll be able to take them off and fold them up together for storage.

A good solar box oven with good insulation, double glazing, and large trapezoid reflectors can reach 450F in under 15 mins very easily. With food inside the temps will read far less until the food is finally being fully cooked. After that the temps rise sharply.

Don't try to cut your own tempered glass. Buy it pre-cut and design your box to fit.

Here's one mine. (old reposted pics)

>>819189
A few more pics of my main one. The smaller box, is just a bread riser box. Though the same thing can be done using the main solar box oven without its reflectors. One the bread has raised, just pop on the reflectors. I use hooks and bungees to hold the panels on.

It cooks anything you can cook in a conventional oven.

Here's a mini one that I made from trash. I only used tape, no glue for this. It worked well with only the plastic bag as the double glazing, but the plastic was pretty hot.

Here's a camping prototype solar box oven I made. I keep it behind my truck seat all folded up. It works at a lower temp, but still a higher temp than most solar box ovens. All it is made of is cardboard, glass, glue, bamboo skewers, aluminum foil, and duct tape.

These things are super easy to make a really fun.

>>819118

is this a picture for ants/ WTF am I even looking ta here and WTF is OP wanting to build? how bout some more info

>>819266
Use 4chan's built in google reverse image search for fuck sake.

>why the hell is there foam backing for the reflector panels?

>Family goes camping
>Makes solar oven out of a cardboard box and tinfoil to cook hotdogs just to see if it works
>Solar Cardboard oven erupts into flames
>Kick it into the river
>Go back to the fire pit

How much sun do you need for these to work properly?

Clear day at noon or you know, kind of bright?

>>819658
You really have to be trying to make something that catches on fire and is a solar box oven. A solar funnel cooker (pic) or parabola solar cooker can set things on fire easily; like a magnifying glass.

As for your questions, it really depends on the design and style of the solar cooker. For overcast days the best one to use is a well insulated solar box cooker with lots of reflective panels. However, cooking temperatures do not need to be as high as a conventional oven. So long as it reaches 170F you are good to go. The length of time for cooking does increase. Thus, a high heat solar oven helps reduce cooking times.

On a fairly overcast day, my solar box oven can reach about 200F to 215F without too much trouble. It doubles that when the full sun comes out. In that cooker, I've cooked fried chicken and baked bread in the dead of winter with 2 feet of snow around me and -10F temps outside.

Obversely, you can use these things to chill stuff on a very clear night. Just point them at the open sky and they will lower the temps in the cooker up to 15 degrees sometimes. You can even make ice water. It uses the open sky as a heat sink and shields it from ambient heat in the surrounding environment.

>pic of my old funnel cooker at a worksite

>>819675
Plans for the funnel cooker reflector.