roob wrote:I dont think that putting fibreglass inside one of these would work too well, because you are relying on the meths to get really hot and evapourate, the fibreglass would seriously slow that down and you would have to use loads of primer.
Actually it reduces the amount of primer fluid needed. You might not realize why at first, but it's pretty simple. Without the wicking -you have to heat the ENTIRE volume of alcohol to get an evaporation rate high enough to sustain a burn. With the wicks, you only have to "boil" the small fraction that is actually in contact with the stove wall. If you watch Zelphs comparison video between the Cobalt(with wick'd walls) and the WBS - the wick'd walls is what keeps the Cobalt burning normally even after the base is flooded with cold water. Because the top of the stove isn't cooled and is still in contact with soaked wick - whereas the WBS and most others this test takes the alcohol reservoir temp down too sharply.