Natural occurrences Fire occurs naturally as a result of
volcanic activity,
meteorites, and
lightning strikes. Many animals are aware of fire and adapt their behavior to it. Plants, too, have adapted to the natural occurrence of fire . Thus, humans encountered and were aware of fire, and later its beneficial uses, long before they could make fire on demand. The first and easiest way to make a fire would have been to use the hot ashes or burning wood from a forest or grass fire, and then to keep the fire or coals going for as long as possible by adding more combustible material.
Friction warrior lighting a fire, blowing on it to add oxygen that encourages the fire to spread Fire can be created through
friction by rapidly grinding pieces of solid
combustible material (such as
wood) against each other (or a hard surface) which are heated and create an ember. Successfully creating fire by friction involves skill, fitness, knowledge, and acceptable environmental conditions. Some techniques involve crafting a system of interlocking pieces that give the practitioner an improved mechanical advantage; these techniques require more skill and knowledge but less fitness, and work in less ideal conditions. Once hot enough, the ember is introduced to the tinder, more oxygen is added by blowing and the result is ignition. The
hand drill is the most widespread among indigenous cultures, characterized by the use of a thin, straightened wooden shaft or reed to be spun with the hands, grinding within a notch against the soft wooden base of a fire board (a wooden board with a carved notch in which to catch heated wood fibers created by friction). This repeated spinning and downward pressure causes black dust to form in the notch of the fireboard, eventually creating a hot, glowing coal. The coal is then carefully placed among dense, fine tinder, which is pressed against it as one blows directly onto the coal until the tinder begins burning and eventually catches into flame. The advantage of the hand drill technique is that it requires no rope. The
bow drill uses the same principle as the hand drill (friction by rotation of wood on wood) but the spindle is shorter, wider (about the size of a human thumb) and driven by a bow, which allows longer, easier strokes and protects the palms. Additional downward pressure is generated by the handhold. A
pump drill is a variant of the bow drill that uses a coiled rope around a cross-section of wooden stake spin the shaft by pumping up and down a cross-member. (right) The
fire plough or fireplow consists of a stick cut to a dull point, and a long piece of wood with a groove cut down its length. The stake is pressed down hard and rubbed quickly against the groove of the second piece in a "plowing" motion, to produce hot dust which creates an ember. A split is often made down the length of the grooved piece, so that oxygen can flow freely to the coal/ember. A
fire-saw is a method by which a piece of wood is sawed through a notch in a second piece or pieces to generate friction. The tinder may be placed between two slats of wood with the third piece or "saw" drawn over them above the tinder so as to catch a coal, but there is more than one configuration. A
fire thong uses a non-melting cord,
ratan, or flexible strip of wood to 'saw' the wood creating friction. On the board, opposite the cord, is a well with a hole through the board to gather the charred, soon-to-smoke, wood dust. The
Rudiger roll friction fire method, also known as the "fire roll" method, is believed to have been invented by World War 2
POWs. A German
survival expert named
Rüdiger Nehberg wrote about this method in one of his books. A small amount of
wood ash is rolled up in a piece of cotton like a cigar. The cotton is then placed between two boards and rolled back and forth. Pressure and speed are both gradually increased. With proper technique ignition can occur in seconds.
Percussion , Sweden in 1916. A
fire striker or firesteel when hit by a hard, glassy stone such as
quartz,
jasper,
agate or
flint cleaves small, hot, oxidizing metal particles that can ignite tinder. The steel should be high carbon, non-alloyed, and hardened. Similarly, two pieces of
iron pyrite or
marcasite when struck together can create sparks. The use of flint in particular became the most common method of producing flames in
pre-industrial societies . Travelers up to the late 19th century would often use self-contained kits known as
tinderboxes to start fires. has a ferrocerium rod stored in the handle, which can be used to make sparks to ignite tinder. Some fire-starting systems use a
ferrocerium rod and a hard scraper to create hot sparks by manually scratching the ferro rod with a knife or sharp object to ignite man-made or natural tinder. Fire starters based upon ferrocerium are popular with Woodcraft practitioners, bushcraft hobbyists and
survivalists. Similar sparking devices have a built-in striking blade which provides an easy method for sparking with one hand. Another common type has the ferro rod attached to a
magnesium bar that can be scraped with a knife to make a powdered tinder that will burn for a few seconds. Hiking stores sell both magnesium starters,
firelighter blocks, and other specialist
tinder.
Lighters Lighters typically use a percussion-type sparking device to ignite gaseous or liquid fuels such as
butane,
naphtha, or
gasoline. These are simple to light, often using a wheel mechanism that when spun with the thumb creates friction on the internal rod of ferrocerium "flint" and throws a shower of white-hot sparks into the gas or wick. Alternately, an electric spark ignites the fuel. With almost 2 billion lighters sold each year, this is the most popular means to light fires today.
Compression of air A
fire piston ignites a combustible substance by rapid compression of air. Similar to how a
diesel engine works, rapid compression of air heats the interior to , well above the tinder's
autoignition temperature. Tinder that holds an ember such as charcloth must be used. After compression, the piston is opened quickly and the ember is transferred to a larger pile of tinder.
Solar Sunlight can be concentrated using a
lens (such as a
burning glass) to focus the energy from the sun onto tinder. A
concave mirror can also concentrate the sun's rays onto tinder.
Chemical An exothermic chemical reaction can generate enough heat as to catch itself or tinder on fire.
Matches are small sticks of wood or stiff paper with a coating that undergoes an exothermic reaction when triggered by friction. Other reactions that can be used to start fires include: • calcium hypochlorite and automotive brake fluid • potassium permanganate and glycerin • potassium permanganate, acetone, and sulfuric acid • sodium chlorate, sugar, and sulfuric acid • ammonium nitrate powder, finely ground zinc powder, and
hydrochloric acid • sulfuric acid, zinc, and platinum (as in
Döbereiner's lamp) •
Percussion caps, as used in
muzzleloader firearms, and
primers used in rifle and shotgun shells create a stream of sparks when rapidly struck.
Electrical Electrical firemaking involves the contact of an
electrically heated object to tinder. A current is run through the object until it is red hot, like the burners on an
electric stove, and it is brought into contact with the tinder, lighting it. For example, a foil-paper chewing gum wrapper will heat-up and ignite, or a flashlight battery coming into contact with a thin wire mesh (such as steel wool) may produce enough heat to ignite charcloth or other tinder. Larger batteries can generate sparks when its leads touch. ==See also==