We get a lot of customers in here asking us to teach classes for Boy Scouts, first time campers/hikers, and just general outdoor/survival skills. I don't get outside enough, so I figure this is a good excuse. I am going to start out with some day hike trips and would like to have some skills to show people. People ask how to pack a backpack, signal, read maps, select a campsite, and other basic tasks, but probably the most frequent request I hear is how to make a friction fire.
I can build a fire and keep it going just fine in about any condition and don't have a problem finding and making a tinder bundle using natural materials, but the friction fire part has me thinking a bit.
My question is what kind of woods would you Southerners recommend for the different parts? The caveat is that I need stuff that is plentiful in middle and southern Georgia (we'll say metro Atlanta and below), so that mostly gets rid of cedar and the other standbys that I am used to in the mountains. Pine is too resinous and there are not really a lot of other soft woods around there for a base board.
Any recommendations? I know a friction fire can be made with any wood if you try hard enough, but I want something that someone can do without destroying their hands for an hour straight. I don't want people to get frustrated their first time out. I know that practice is the only way to get proficient and the first try might lead to failure, but handing someone ironwood and telling them to go to town is probably not the best way to get people interested in this kind of stuff.
Storl,
I've done my share of bow drills and so on, but I'll state that identifying the wood from a tree it is no longer attached to is at the very least impractical - and generally unnecessary. The ol' fingernail trick can tell you most all you need to know. The fireboard should be a soft wood, or at least softer than the drill shaft. The handhold should be harder then the drill shaft. The rationale should be self-evident when it comes to fire making with friction alone.
If you can push your fingernail into the fibers of the wood fairly easily, that's a soft wood. If you can barely get a dent, but it does yield, it's a medium wood. If you cannot indent the wood with your fingernail, that's a hard wood and needs to be on the top forming your handhold. The material you use for the bow is less critical, just about any sapling, seasoned or unseasoned will get the job done so long as you have a bit of natural curvature and enough length for a loop of fairly loose strung cordage. A common mistake is making the bow too tightly strung, you'll be launching no missiles from the bow used in fire making!
The fingernail scale for determining wood hardness works in any part of the world. As long as you have more than one species of tree in a given area, you should be able find the materials to make a bow drill.
The wood you choose is ultimately less critical then your technique. It took me hundreds of hours of practice to get a burning coal out of the fireboard, this after many tens of hours of being told I had to practice with "green" wood to get the technique perfected. When the drill point gets to the point where it is too hot to touch to a finger for more than a couple of seconds, you're getting close, but it's got to get a heck of a lot hotter to form a smoldering ember.
I was also given a branch that was both too crooked and too wide a diameter to get the angular velocity necessary to start a coal up on the fireboard, another way to force you to learn to improve the state of the tools and to further improve your technique (at least among the old school types, not sure how they teach this now). It took two hours to trim back the crooked branch's material to a cylindrical shaft and pare down the diameter until it was just about 1/2".
Smaller drill shafts get the point hot faster, but they can be unstable and bend as you put your upper body weight on the hand hold. To make them stiffer, you have to reduce the length until the shaft can become impractically short and the bow (especially if you are getting tired) can dig into the ground or upset your tinder pile. I like leaving at least the inner bark on to give me a bit of traction under the cordage, it also reduces the time to setup and start a fire.
A slightly thicker drill shaft with a length of just less than a foot or so of a medium hardness wood with a reasonably round and fairly smooth surface gets the job done pretty well. The notch in the fireboard is another fine point. If you fail to get a good coal after a few minutes, the notch may need to be reshaped (while cussing usually) in order to give you a chance to convey the hot coal into the tinder pile.
You should also grease the handhold to keep friction from building up heat on the wrong end of the works. Sappy plants can make a makeshift "grease" assuming you properly prepared the handhold and drill shaft with a well rounded profile smoothed out with whatever abrasives you can find. The two should fit together like fine machine parts to get the maximum efficiency. Don't use anything that can melt with heat (animal fats, etc.) that can end up going down the shaft, making it slippery, or worse, dousing your hard work on the fire board.
I found that the biggest challenge was keeping my own sweat out of the damned fireboard when going at it for 20-30 minutes, with furious bursts 10 minutes at a time. In general, if it takes more than about 10 minutes to produce an ember, either your technique is wrong, your materials are not well dried and seasoned or the dimensions of the drill shaft and bow are not appropriate and you aren't producing enough friction to make a coal.
In learning this technique, if you are serious, endless perseverance helps.
Good luck,
-E