The Worlds Lightest Alcohol Stove!
The Ion Stove includes a windscreen Kit. This kit consists of a 6" square piece of heavy duty aluminum to construct the Heat Reflector, and a 3"x24" piece of 36 gauge of aluminum sheet with a 12" section that has pre-cut air holes provided. The copper surface of the windscreen is intended to face out.
After much testing I have found that a wind screen should be large enough to have a 1/4" (6mm) gap all the away around. Closer and you choke off the stove, further out and you loose heat. Windscreen height actually matters less than distance to the pot. I found that a windscreen as tall as the bottom of the handles was better than a tall one because it maintained better air flow and weighed less.
1. Determine the dimensions. Measure for your wind screen height. A good rule of thumb is to make it to the bottom of the pot handles. After determining this height, I add 1/4" (6 mm) to that (optional - see below) in order to make a strengthening fold. You can either trim the windscreen to the desired height, or if a space is needed for handles, simply cut a slot at the top to have the handles protrude through.
2. Determine the length. To determine the length of the aluminum do the following:
a. Find the diameter. The is the entire width of the pot at the widest point.
b. Take the diameter and add 1/2" (12 mm) to it. This is the gap for the windscreen around the pot. Multiply this x 3.14, example: pot diameter of 6 7/8" + 1/2" = 7 3/8" (174.6 mm + 12 mm = 186.6 mm). 3.14 x 7 3/8" = 23 1/16" (3.14 x 186.6 mm = 586 mm). Add .5" (12.5 mm) more for room to bind the ends, and you have 23 9/16". I like to round up to the nearest 1/4" (6 mm), so we make the total length 23 3/4".
2. Optional: Fold over a little flap of the screen. This is what the extra 1/4" (6 mm) of height is for. At the top and bottom of the screen, bend over a 1/8" (3 mm) wide strip except at the last 1/4" (3 mm) on each end. I find the best way to mark this for an easy bend is to mark it with a marker - the standard one I use is 3/8" (9mm) wide on the narrow.
3. Permanent circle Windscreen (recommended): Join the ends by making a slot and fold tab joint at the ends. Cut a slot approximately 1/4" from one end. The slot should be about 3/4 of the height of the windscreen. On the other end, cut tabs approximately 1/4" from the top and bottom that will make the center of the screen slightly smaller than the slot you cut in the opposite side. Join the ends by folding the tabs down, then inserting the new narrow piece through the slot on the opposite end. After the end is through the slot, fold the tabs back out to form a permanent circle. and fold one over each way. Now the windscreen is a continuous circle. To store it, simply fold it flat and store in your pot. To use it, just unfold and straighten gently.
3. Non permanent windscreen: Use a paperclip to hold the ends together while cooking.
4. Heat Reflector: Make a bottom heat reflector from the heavy duty aluminum foil. Do this by placing the windscreen on the foil, then marking the circle on the inside, then cut that circle out. You can fold this up and store it inside the pot and it hardly weighs anything. This is provided to prevent burning things unintentionally and increases the efficiency of the stove.
7. To store simply flatten the screen, then fold it in half.