Been a while hasn’t it?
I really haven’t done……Anything. At all. It been a very glacial week for me, staring at the clock hands ticking. I seriously need to get out there. I desperately need to chainsaw something, NOW!!!!! I can’t think, or work, or even terrifiy my neighbors. This is probably going to be my shortest, most boring post ever.
A ropedart is swung and thrown, using the principles of mechanical advantage, to attain tremendous velocity and kinetic energy. It is a steel dart 13-23 cm long weighing somewhere around 0.3kg attatched to a length of cord about twice as long as the user is tall. This is how to make one from a rail road spike (which can be found along any rail road track).
Take a trip to some RR tracks and go for a walk. Pick up spikes which are laying loose on the ground. This may be illegal, so be warned. I take no responsibility for your actions. Try to select the straightest, least corroded, spikes. They can also be bought from the internet.
Don’t worry about rust, it will come off…
Take a hacksaw / sawzall / laser / oxy-acetylene torch / or -my personal favorite – angle grinder w/ cutting disc out. Cut off the head of the spike to the first point at which the thickness is uniform.
Drill a hole at the back of the dart (where you just cut off the top of the spike). Use a drill bit large enough to accomodate paracord, climbing accessory line, or a heavy-duty metal split ring. We are drilling this hole first because in case it is off, we can re-center as we shape the dart.
If you are annoyed by my lack of numbers and measurements, think of this: I don’t know optimum numbers. I taught this to myself, so my way is not the ‘right way’; your guess is as good as mine. If you are desperate for a measurement, just comment, and I’ll let you know.
Now the fun part!
Using a grinder or file, begin to shape the dart. The front should taper to a (sharp) point. It can have any number of sides greater than three (as you approach infinity, the shape becomes conical). Mine has four. Experiment and see what you like.
You can taper the dart along its length one way or another if you like, and add in any sort of design which pleases you.
At the back of the dart, I put in angled cuts to prevent the dart from catching on the cord as it pivots
This is quite important. With a dremel or chainsaw file, smooth off the inside and edges of the hole drilled in step 4. If you use a cord to attatch the spike to the rope (as I did) this is necessary to minimize chaffing. You do not want 1/2 lb. of pointy steel flying off at over 100 mph because a burr sliced the cord.
Get a rope about 3/8″ in diameter and ten to twenty feet long. The thicker the rope, the slower your dart will be; the thinner it is, the more it will cut into your hand.
WARNING: DO NOT USE NYLON OR OTHER “DYNAMIC” ROPES. THEY HAVE ELASTIC PROPERTIES WHICH COULD CAUSE THE DART TO RETURN TO YOU UNPREDICTABLY WITH GREAT FORCE. CAUSING YOU TO HAVE SERIOUS LACK OF FACE.
Get a short piece of narrow, strong cord (like climbing accessory cord) which will fit through the hole you drilled. Alternatively, you could use a metal ring, several, or some sort of chain. (I’ll be using a type of chain for my next.)
How tall are you? Multiply by two. This is how long your rope and dart should be once all of the knots are done. This is a very general guideline, which should be altered according to your preferences through experimentation. My rope is currently 12 feet long.
Tie a prusik knot or taut-line hitch at the end of the rope to form a loop. This loop can now be slid to adjust to the size of your wrist.
I take no responsibility for anything/anybody destroyed with this by accident or otherwise.
This is a VERY BASIC outline of what to do:
Slide wrist loop over your non-dominant wrist (right wrist if left handed), then wrap rope once or twice across that hand. Hold rope with other hand (leaving several feet between hands) and start twirling the dart around. Release. Repeat. There are many advanced techniques (such as rebounding the spike with your foot) which you’ll learn as you go.
If you don’t want to kill anyone, replace the dart with a ball of kevlar, soak in gasoline, light on fire, go to a beach, and impress crowds.
HAVE FUN!
