After much experimentation, it was determined that for this particular design, the most efficient stove is one with 8 evenly spaced "thumbtack" sized holes. Even spacing is important for most efficient heat output. Also make sure your holes are all the same size.
When using denatured alcohol:
- The packed camp stove (when made with the same materials in this instructable) is 4.5" (11.43 cm) in diameter, and 3" (7.62 cm) high.
- The stove with all options (cup/hook) weighs 6.5 oz (184.27 grams).
- The stove can easily handle up to 5 lbs (2.27 kg). I did not bother testing further as you shouldn't need to cook anything over 5 lbs (2.27 kg). while camping/hiking, and I didn't want to destroy another stove.
- The stove can hold up to 2 oz (59 ml) safely.
- 2 oz (59ml) will burn for roughly 30 minutes.
- Stove should take 30-45 seconds to heat up enough to use.
- Stove takes approximately 3 minutes to cool down after use.
- 2 cups (16 oz, 1 lb, 473 ml, 453.59237 grams) of water at room temperature (70 F, 21.1111C) will boil (212 F, 100 C) in under 5 minutes (300 sec).
- "Heet" burns slightly longer, but with less heat (ironic, no?) meaning longer boil times. It also has an off-putting odor. Not recommended, but works in a pinch.
The penny stove does have a good deal of "wasted space" in it. Particularly in the lid. If this stove is something you like to keep around "for emergencies" instead of to use regularly, consider using that space in the lid.
- Rig a long, sturdy plastic bag (can be made with a FoodSaver) to hold 2 oz of alcohol, and stuff it into the empty space. Remove the "Fuel Cup" for even more space.
- Add some waterproof matches or a small flint
- Fishing hooks and fishing line
- Antibiotic ointment
- Water purifier tablets
- A small compass
- Sealed toilet paper
- Lengths of nylon cord
See what all you can stuff into all the nooks and crannies, and you'll have the ultimate emergency kit, complete with stove! The stove can be used to get even the wettest wood started burning.