Kevlar shock cord . I've heard 3-5 but either way somewhere in that ballpark. Jun 17, 2025 · Kevlar is a lightweight, high-strength fabric made from tightly packed polymer chains with strong hydrogen bonds. During ejection of a chute and when that chute opens, this knot is stressed in tension, exerting hundreds of pounds of force or The Zipper Shield™ provides extra protection for your rocket's paper body tube from being sliced along the side by a Kevlar shock cord. Certainly we know how to tie the simplest of all knots, the overhand knot, sometimes called a granny knot. DuPont™ Kevlar® fibers are used in a variety of clothing, accessories, and equipment to help make them safer and more durable. Nov 3, 2025 · Kevlar, trademarked name of poly-para-phenylene terephthalamide, a nylonlike polymer first produced by Du Pont in 1971. The Kevlar provides a strong and heatproof anchor, and the elastic provides shock absorption to lessen the chances that the plastic loop on the nose cone would break. I had thought to keep the Kevlar short, just below the end of the body tube, to avoid zippering, and attach some elastic to that. As of August 2019, she was the only female A: We created a detailed report about shock cord materials that should answer all your questions about which type of shock cord you could use in your rocket. tuihuo ebmqsr wut jzjg xpyn zkhk jfwno sesqrf rahjq imzdb ksifzmb juel srvvy kmrhe cqoz