The reflector is made from a 61 cm. x 122 cm. (2-foot by 4-foot) rectangle of reflective material, with three scissors cuts as shown in the template. Overlapping the cuts as shown produces the proper shape, and the material is then secured with two brass paper fasteners (brads) inserted through holes punched with an ordinary paper punch. When the sun is low, moving the pot forward will "rock" the front of the reflector down, and the back up, to catch more sun.The windscreen is made from a 30 cm. (2-foot) diameter circle of 0.5 mm (.020-inch) UV-resistant polycarbonate film. For increased rigidity, a radius cut is overlapped two inches to form a flat cone like a sun hat. The overlap is secured by an "R-clip" (a cotter pin that looks like the letter "R"), which is inserted into holes (punched in the windscreen with a paper punch) and then attached to the reflector material. The windscreen makes the cooker quite rigid in windy conditions, and creates an "oven-like" atmosphere around the cooking pot. The cooker itself can withstand strong winds if a stiff wire is inserted through the natural holes at the bottom, and held down with bricks or rocks.
Cooking sleeve. Instead of a cooking bag, the black cooking pot is enclosed in a "sleeve" of .020-inch (0.5 mm) UV-resistant polycarbonate film. A 15cm x 92cm (6" x 36") rectangle of polycarbonate film is rolled into a cylinder slightly bigger than the cooking pot, and secured with ordinary paper clips. The top rim of the cooking pot rests on the top edge of the cooking sleeve, which insulates the cooking pot and elevates it off the surface of the reflector, allowing the sun to be reflected onto the bottom of the pot.
Roger Haines email@example.com (858) 736-5505
Recent news and updatesEdit
- April 2014: Building material supplier in Kenya imports solar cooker supplies - Roger Haines reports that Global Hardware, Ltd., a prominent Nairobi, Kenya building supply company, (http://www.globalhardware.co.ke), has agreed to purchase a large quantity of reflective foam insulation and polycarbonate plastic film for resale at low cost to solar cooking entrepreneurs. This is expected to reduce to less than $10 the wholesale cost of materials in Nairobi for the newly-designed Haines II foam solar cooker. The hope is that the availability of these inexpensive materials will promote the creation of new solar cooking entrepreneurs in East Africa. Haines' San Diego Rotary Club will purchase materials for 500 of the new cookers for distribution by the Rotary Club of Gulu, Uganda.
- See Roger Haines.