Knots You Need to Know and Help to Remember How to Tie Them
This week we ran across an interesting article discussing the Massachusetts Institute of Technology’s (MIT’s) new mathematical model which predicts a knot's stability; “A New Mathematical Model Predicts a Knot's Stability”
To examine the issue MIT mathematicians and engineers developed a mathematical model that predicts how stable a knot is based on several key properties, including the number of crossings and the direction in which the rope segments twist as the knot is pulled tight. "Empirical knowledge refined over centuries has crystallized out what the best knots are," said Mathias Kolle, the Rockwell International Career Development Associate Professor at MIT. But what exactly makes one knot more stable than another has not been well-understood, until now. "And now the model shows why."
In comparing the diagrams of knots of various strengths, the researchers were able to identify general "counting rules," or characteristics that determine a knot's stability. Basically, a knot is stronger if it has more strand crossings, as well as more "twist fluctuations" - changes in the direction of rotation from one strand segment to another. For instance, if a fiber segment is rotated to the left at one crossing and rotated to the right at a neighboring crossing as a knot is pulled tight, this creates a twist fluctuation and thus opposing friction, which adds stability to a knot. If, however, the segment is rotated in the same direction at two neighboring crossing, there is no twist fluctuation, and the strand is more likely to rotate and slip, producing a weaker knot. They also found that a knot can be made stronger if it has more "circulations," which they define as a region in a knot where two parallel strands loop against each other in opposite directions, like a circular flow.
If you do any Camping, and to a lesser extent Hiking, then a working knowledge of the most commonly used knots is essential. Based on our years of experience the 10 knots that we think it is critical for you to absolutely know are:
The problem is that there’s actually a lot to remember, especially if a significant amount of time passes between you actually tying these knots. So we use two items to help our memory as needed, and to give us information on other knots too. The first is the Ultimate Survival Technologies (UST’s) “Learn & Live” Knots card which has instructions and illustrations on how to tie 11 commonly used knots. You can see the details on this card, and the other 5 credit card sized cards that we think are valuable to have, on our Hiking/Emergency Supplies page.
The second item that we use to help us with knot knowledge is the “Knots 3D” app. What a great tool this is! The $4.99 standalone app (i.e. no internet required) by Nynix is worth every penny since it shows you in detail how to tie 135 knots.
The app includes the following information on each knot: best uses, other names that the knot is also known as, related knots, “Ashley Book of Knots” (ABOK) number, classification, structure, strength and reliability and a 3D animated video showing the knot being tied. In addition, the app allows you to:
The Knots 3d app’s ability to rotate a knot to see the front, back and everything in-between is indispensable and provides interactivity you can't get from a knot book’s static photographs. You can get the app at the Apple Store, Google Play Store, or Amazon Store.
If you’re looking for other good information on knots used for camping, or survival, here are four good online articles that we recommend you take a look at:
5 Best Survival Knots – Strong Life Saving Knots You Need To Know
Camping Knots: 6 Essential Knots Every Camper Needs to Know
The 7 Most Useful Survival Knots You Need to Know
Essential Knots: How to Tie the 20 Knots You Need to Know
What's On This Page?
Here's where we post reviews, questions, answers, thoughts and other information that's of general interest to our followers in a blog format.