
"'There's another thing. We can help them find us. If a ship comes near the island they may not notice us. So we must make smoke on top of the mountain. We must make a fire.'
'Fire! Make a Fire!'" -- Lord of the Flies
Using fire industriously is a behavior that distinguished humans from other animals. In the hierarchy of needs, fire satisfies the need for body temperature regulation. Not only is it good for destroying zombie corpses, but it is the foundation for many human industries. This first industry being the need for potable water.
In the following pages explore:
First, let us learn more about the heat source we all know and love to play with; Fire! Fire is the heat and light that is released during combustion. For the purposes ZSDW is concerned with, we are only discussing combustion of hydrocarbons.
In order for combustion to occur there must be thee factors simultaneously present; fuel, heat, and oxygen.

Should any leg of of the triangle be removed, then combustion will cease. Hence most fire extinguishers aim to remove oxygen or temperature. Water, carbon dioxide, and dry chemical extinguishers accomplish both goals. (Note to those bugging in: Home use fire extinguishers should be of the "ABC" variety. )
Further, combustion occurs in a number of stages; Drying, Pyrolysis, and Charcoal. At any time during a fire all three stages may be occurring at once. The pyrolysis stage is chemical break down of the hydrocarbons yielding

heat and light. During this stage hydrogen, methanol, carbon monoxide, and a soup of -enes and -ines are released.
We have not had enough Threes yet. In order to have complete combustion we have another three factors to consider: time, turbulence, and temperature. Reducing any of these three will result in less complete combustion. (Note to those bugging in: incomplete combustion leads to creosote formation in your chimney. This is true for all fuels. Have your chimney for fireplace and house heater inspected annually. {cf.
CSIA.org } )
How do these three affect combustion? The moisture content in fuel will affect both time and temperature. Fuel that is too wet has prolonged drying and looses heat to latent energy. Fuel that is too dry burns too quickly reducing temperature. How densely the fuel is introduced will affect turbulence. How much air can mix with the fuel will affect turbulence. Too much air will affect temperature as will too little air. A very good example of these concepts is in the "bird's nest" tinder ball. You will always notice that the "pros" have a fluffed up tinder nest with a pocket for the coal. The fluffing increases turbulence and the pocket regulates how much air is received. The "pros" always caution against blowing on it too rapidly. Of course they also always harp on the necessity of dry tinder. What is not obvious is the balance of the three factors is always there; hard won by experience.
For both survival situations and in the homestead, burning of any fuel requires wisdom and caution. Both of these are gained though practicing the use of fire. If approached with caution, playing with fire need not be pyromania, but should be considered pyrology.
by:
Zee-Man