About the Bungee Jump cords
I learned on a mil. spec. program. In pirate jumping it has a range of advantages. You’ve a set of five individual cords that you group with each other in a set of 3,4,or5. So it is possible to jump from 100-250lbs with one set of cords. They may be covered in Nylon (or Cotton) sheaths that protect them from dirt when you lay them down. Also, the redundancy of multiple cords, too as the sheaths which act as a static back up within the case of over elongation, supply (I think) a greater degree of safety. Traditional mil. spec. cords have an elongation of about 110%. By the way, from the “bungy or bungee” page a popular mistake is made about this word. Elongation refers to the change in duration of the cord, not the ultimate loaded duration. So 110% elongation in a 100 foot long cord is 110 feet for a total stretched length of 210 feet, or 2.1 times it is original length. Since mil. spec. cord stretches much less, a longer period is frequently utilized, resulting in much more initial totally free fall.
After the 1995 X-games I realized that, due to the fact with the bigger rebounds, additional acrobatic stunts had been possible on all rubber cord. So I set about learning how to construct that form of cord. New Zealand style cord is built having a ribbon, about 3 inches wide, composed of a number of stands of rubber. This is wrapped all-around teflon spools, tied with each other, stretched to it’s ultimate elongation and wrapped down it is time-span, using the very same form of rubber, to hold it all with each other.
The actual building of an all rubber cord, or tying loops on the ends of mil. spec. cord isn’t something that may be learned by means of words only. You have to find out very first hand from somebody who knows what they are doing. So you possibly can watch them and they can check your work. The exact same goes for the bungee program, regardless of whether it’s a lowering system, a man basket on the winch, or a raising technique, you either should find out it first hand or begin from scratch using the engineering done on all the materials, and many practice “jumps” performed with sandbags.
New Zealand specification cord has an elongation of緈-300%, i.e. it will stretch to 3-4 occasions it can be original duration. I feel the Kocklemans came up while using idea of building a time-span of webbing into all rubber cord. This back up is the time-span on the ultimate elongation on the cord. This provides it the redundancy that I like. The Kocklemans develop their cords thicker than New Zealand specs. This gives the cord a long life (more than 1000 jumps) but results in higher G-forces, and less capability to do rebound tricks. I think their elongation is 150-200%.
It can be challenging to ascertain actual elongation mainly because many people will tell you the time-span with the all rubber cord prior to it’s stretched out and tied down it is period. This makes the cord a little longer (about 5-10%) than when the ribbon is very first layed all-around the spools. For instance, for a 100 foot jump you would very first lay the rubber out at 22.5 feet, which would ought to stretch to 4.5 times it can be original time-span to obtain to 100 feet. But once the cord is stretched and tied it would be about ǹ feet long. So then it would should stretch to 4 instances it is duration to reach 100 feet.
Nicely, I’m starting to ramble so that’s all I need to say about that. Here’s some info for your bungee web-sites list. Total Rebound and Yesh in California are pals of mine which are no longer inside the business. My business is going to be active again in Northern California in December 1996. I’ll update you later. The web-sites at Raging Waters and Large Bear were both temporary stops for Thrill Sport Productions, who produces our show in Taiwan. They will have arches at state fairs this summer in Wisconsin, Michigan, Ohio, and other places. Their Corporate office is 88 A Elm St. Hopkington MA 01748 Tel.(508)435-0420 Fax(508)435-6594. Total Tough Core Gear, in Redding California, makes what I think are the greatest harnesses. They make both ankle harnesses and chest and waist harnesses. They may be fleece covered, well padded, and use self locking parachute buckles, which are uncomplicated to use and secure. Sorry, I do not have their address or phone amount. I employed the N.Z. Bungy Knot ankle binding at the 95 X-games and didn’t like it. Like you said, you feel trapped. Also, the force is transferred to your legs with a 1 inch strap, which, even although padded, digs in right after a whilst. The worst thing although is that when it tightens there is a 2 foot strap of webbing hanging off which can wrap close to your calf on a rebound and then your are hanging from an unpadded 1 inch strap which genuinely abrades the skin and can cause hematomas. This happened to three of my good friends at the ’95 Extreme Games.
The Euro Cord
The European/New Zealand cords described above look like this
Steve who wrote that section above believes that the US mil spec system is safer since of the extra redundancy, but the Euro cords do have the advantage that they could be inspected after each jump for signs of rubber failure or possible difficulties. The sheath on Mil spec cords prevents this. Some Euro cords have an extra static line built into the core to prevent over stretch and offer extra backup. The term Euro cord is really a little misleading – this cord is utilized and made in quite a few countries.
Mil Spec Cord
Mil Spec cord is cord that’s created to US military specifications, these specifications were designed to hold down tanks on boats and in planes rather than to suspend adrenaline junkies jumping off bridges. As it turns out they work rather well for both!.
Here is some mil. spec cord created by Glenn from Bungee Experience. The pink/white stuff is the cord, the blue webbing is attached in a very exclusive method to the ends of the cords to ensure that carrabiners can be attached to each end. The way the end from the cord is connected with a piece of webbing is known as termination. The Red Tape is part in the specific way the cords are terminated.