Kevlar shock cord. A third loop in the middle is for parachute attachment.

Kevlar shock cord 1/8" x 25ft Tubular Kevlar Harness with 0 sewn loops $14. Aug 6, 2019 · I am going to do my first rocket up using Kevlar shock cord. Then knot the line and add a replacement line above that knot. 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. Kevlar Shock Cord, 1/4in, 2200lb, Raw stock by the yard Hi all, BAR here, with a question about Kevlar for Shock Cord leader. S. The tensile strength for this shock cord is 250 lbs, sufficient for just about any low power model rocket. I've heard 3-5 but either way somewhere in that ballpark. This material is rated at up to 6000 lb, and the cord can be used on large products up to several hundred pounds. Jan 17, 2023 · For example, what a lot of people do is put a short Kevlar shock cord inside the tube, and then attach a rubber or elastic shock cord to the front end. Long Enough for a 60 inch gun. This is the good stuff! Apogee Rockets : Shock Cord - Model Rocket Kits Rocket Motors Launch Accessories Rocket Software Rocket Books & Videos Building Supplies Electronics & Payloads Wearables Gift Certificate Rocket Novelties and Gifts Garage Sale Ejection Systems Display Stands Customization ARC Supplies Advertising Rocket Building Supplies, T. Kevlar is very heat Shock cord, Kevlar, 1/4", 1500 lb, 20 ft Shock cord, Kevlar, 1/4", 1500 lb, 20 ft. For the small, minimum diameter rockets, I just use the trifold mount. We recommend 15+ feet of cord for up to 4” diameter rockets, and 20+ feet for larger rockets. We use this cord for our Iris compact parachutes bridle and anywhere we need the ultimate in strength. In LPR and some MPR mode s this eliminates the cardstock tri-fold mount that might block ejection o May 7, 2018 · Working on a 5. I've launched LPR with stock rubber shock cords where the nose cone went to the end of the cord, stretched it Semroc Kevlar Braided Shock Cord 750# 168" (1pk) SEM-SCK-7168 Semroc Kevlar Braided Shock Cord 750# 168" (1pk) SEM-SCK-7168 The Best Braided Tubular Kevlar C… Jan 7, 2016 · Amazon. From elastic to Kevlar to tubular nylon. 9KM DWLIFE Braided Kevlar Cord, 100lb~2000lb, High Tensile Strength, Abrasion, Flame Retardant, Kite String, Fishing Line, Model Rocket Shock, Tactical Survival Paracord Crafted from premium flat weave Kevlar webbing, this shock cord is designed to withstand the extreme forces encountered during rocket launches and recoveries, offering an impressive 4,500lb break strength that ensures reliability and safety for your most ambitious projects. This is the good stuff! 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. This combo give the best combination of flame proofing at the base and elasticity at the nose cone end. 00 Mar 4, 2017 · Then I tape all the bundles togther. This Kevlar thread has a 1. You mount the Kevlar to the motor mount your favorite way. 75". I replace the rubber shock cord with longer, elastic ones, and I have three different width elastic cord to choose from depending on the size of the model. Braided Kevlar cord is perfect for any Vander-Burn plywood upgrade kit, or for replacing your old shock cords in heavier model rockets. Anyway got some 150# Kevlar and In Peak-of-Flight Newsletter Issue 338, Michielssen explains the installation works by attaching the shock cord to the bottom centering ring (closest to the engine nozzle) and threading the Kevlar shock cord through a small tube positioned between the centering rings. E. M. 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. Certainly we know how to tie the simplest of all knots, the overhand knot, sometimes called a granny knot. For my knots I like to cover the note and extra cord in adhesive backed, high shrink, heat shrink. Kevlar (for 1-24oz rockets) has 220# tensile strength and is a great alternate choice for elastic. This is the good stuff! Kevlar/Nylon Shock Cord Combo Comes with 2 1/2 foot section of Kevlar 12-Strand 1/8 Shock Cord and 5 foot section of 1/8" 550lb test Nylon Cord. T. This largely 10 ft Kevlar Shock Cord (250 lb Strength) When you order multiple lengths, one single long piece will be shipped. Important - This is the raw stock without sewn ends. I've watched rockets with long kevlar or nylon shock cords- the nose cone comes off with some velocity but it plus the laundry slows down before hitting the end of the shock cord. During ejection of a chute and when that chute opens, this knot is stressed in tension, exerting hundreds of pounds of force or Feb 4, 2025 · 4-5 times the rocket length is a good rule of thumb. Among other things, extremely strong ropes, cords, lines, and hawsers are made from Kevlar. A fix recommended at the launch was to cut the line below the damaged section. Order by length shown. e. 88 Add To Cart 290 lbs. C. made Kevlar in a variety of breaking strengths, colors, and lengths. materials, propellant, rocket fuel, space 10 ft Kevlar Shock Cord (250 lb Strength) When you order multiple lengths, one single long piece will be shipped. The tensile strength for this shock cord is 1500 lbs, sufficient for any mid and high-power model rocket. Shop our shock cords from LOC Precision today! These tubular Kevlar cords are strong, light, and worry free. A. Cut to 30 feet long, and both ends sewn with loops for easy attachment. R. The cord is mounted permanently around the motor mount, so repair is kind of difficult. I did read about the charges being real hot these days and I found out the hard way. 1 meter of Braided Kevlar Shock Cord 1500 lb strength [45103]. We have lab tested this DESCRIPTION Our model rocket shock cords come in a wide variety for just about any application. 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. Instead, use a generous amount of non-stretch cord and let air resistance absorb the energy of release. Kevlar Shock Cord, per 10' $5. C, D and up rockets). How long should a Kevlar shock cord be? As a rule of thumb, the shock cord should be 2-3 times as long as your rocket. I had a bad experience with an elastic cord the other day even though I used plenty of wadding it still burned and separated. I've had several failures due to it snapping. The kevlar cord I've been using is THIS ONE from BRS. This largely Jun 5, 2010 · Hi folks, I've been using the kevlar shock cord mounted to the engine tube centering ring thing on my last several rockets. Longer is always better than shorter. $15. This chord is working well and doing the job as intended. 5" LOC Goblin and everyone I've talked to swears up and down that tubular nylon is the worst possible thing to use in high power as a shock cord and to use kevlar. Kevlar® is the brand name of a high-quality aramid fiber manufactured by DuPont de Nemours. Use this in rockets or UAVs of up to 30 lb recovery weight. n static Kevlar line could be tied under the for-ward centering ring of the engine mount. Unless our shock cord has a sewn loop, I guess we’ll need to tie a knot. If you want pre-sewn ends, then you should add the pr Inferno Cord & Technora® Shop our collection of premium Aramid and inferno cord with more than double the strength of standard paracord. 042" Diameter Made in China 100% Kevlar has a 1000 lb. A general rule of thumb is for the shock cord to be at least 3 x the length of the rocket. Waxed for durability and to help your knots sit in place better than unwaxed line. Why Choose Our Kevlar Shock Cord for Your Rocketry Needs? Exceptional Strength: Boasting a 4,500lb break strength, our Kevlar Shock Cord provides the ultimate in security and peace of mind, capable of handling the intense stresses of high-power rocket launches and recoveries. From elastic to Kevlar to Tubular Nylon. Reliable Survival Cord in the Extra-strong Kevlar shock cord for extreme high power rockets. I've used thin paracord, which is many times thicker than kevlar, but doesn't seem like Extra-strong Kevlar shock cord for extreme high power rockets. Due to the chemical Dec 1, 2020 · For other kits, I run kevlar on mostly just the larger ones (i. 2. The edges aren't sealed in any way so I'm worried they will fray. 1. Our 1/8" cord is perfect for mid power rocket air-frames. Due to its special properties, this fiber can be used to produce products for a wide range of specialized applications. Aug 2, 2009 · For the larger rockets in this size and weight range, I have been using a three-part shock cord: Kevlar or steel leader for the first part, a short (1'-2') of flat elastic, and then a long section of polyester-blend paracord (a k a shade cord or Venetian blind cord). Tis seems to really slow the shock of the kevlar down a lot. Visit us online for all your model rocket needs. 125" wide Kevlar strapping (rated at 13,500 Lbs). The Kevlar's width is 0. It is thinner in size so be mindful of Extra-strong Kevlar shock cord for extreme high power rockets. Extra-strong Kevlar shock cord for extreme high power rockets. Giant Leap calls it "Titan Cord" - 35 feet with loops $50 The Kevlar's width is 0. 7mm diameter. Another big advantage to using Kevlar over solely elastic is in its strength (Kevlar is several times stronger than even steel). May 3, 2011 · 1. Oct 5, 2022 · I had a little zippering, which damaged the kevlar shock cord. I'm careful to position it so that it is as far away from the Mar 6, 2024 · Braided Tubular Kevlar shock cords are made of natural Kevlar fibers tested to exceed 750 pound tensile strength Kevlar resist the heat of ejection charges Approximately 0. Shop strong and durable Kevlar Cord, braided from 100% U. TARC Parachutes Rocketman Ultra-Light Annular Parachutes Drone Recovery Systems ¼ Scale Dragster Parachutes Braided Kevlar Shock Cord's Shock Cord Protectors Deployment Bags Jolly Logic Chute Release Tubular Nylon Shock Cords 6" and 12" Wide Streamers Kevlar Flame Shields Charge Wells Tubular Nylon Y-Harnesses Rail Guides Tinder Rocketry For example, what a lot of people do is put a short Kevlar shock cord inside the tube, and then attach a rubber or elastic shock cord to the front end. Rocketarium - 1 meter of Braided Kevlar Shock Cord (1500 lb Strength with a hollow core)When you order multiple lengths, one single long piece will be shipped. 2mm diameter. Shock CordsDESCRIPTION Our model rocket shock cords come in a wide variety for just about any application. I would probably be attaching the Kevlar to the engine mount, and notching the outside of the centering Jun 11, 2017 · I got a Kevlar shock cord from Apogee Components. 12 feet is a good l Comparison - Shock Cord Frequently Asked Questions about the Kevlar Cord 100# Q: What is the differences between the shock cord materials? Which material should I use? And how long should it be? Extra-strong Kevlar shock cord for extreme high power rockets. Cut to 25 feet long, and both ends sewn with loops for easy attachment. . This is an exceptionally high-quality Kevlar shock cord custom-made for Fruity Chutes. This conforms to Mil-Spec Kevlar standard PIA-C-87129D and material is sample tested at the manufacturer. 1/4 inch Kevlar shock cord features pre-sewn loops and is tested for at least 2000 lb. 3/4-inch wide width to prevent zippers on cardboard tube, and test strength of 4,500 lbs. This protects from the gasses and keeps things tight togther. test. It works fine but I never Dec 30, 2002 · Anyone care to share their opinion(s) on using kevlar versus tubular nylon shockcords on larger projects? I am building a 100 pound Blossom V-2 and was initially inclined to use 1. S. There's a reason why so many professionals trust their lives with aramid materials. This is the good stuff! Mar 5, 2024 · Braided Tubular Kevlar shock cords are made of natural Kevlar fibers tested to exceed 400 pound tensile strength Kevlar resist the heat of ejection charges Approximately 0. 08" diameter (2mm) Made in China Inherently Flame Resistant, withstanding extreme temperatures up to 800 °F / 427 °C! To build shock lines, parachute systems for model rockets, or replace/upgrade wicks of torches / lamps, Kevlar cords are the unbeatable choice for you to fulfill flame-resistant demands and for applications in high temperatures. 350lb 700 lb 1500 lb 2000 lb 3500 lb The Kevlar's width is 0. The Zipper Shield™ provides extra protection for your rocket's paper body tube from being sliced along the side by a Kevlar shock cord. Order online or start a free custom consultation with our fiber experts. Enter quantity in yards to purchase. 95 Add To Cart 3/16" x 15ft Tubular Kevlar Harness with 2 sewn loops This is our PAC certified, custom-made 1/2 inch wide material. If it's THAT bad, why do companies still put nylon in the kits and not kevlar? I'm using 5/8" climbing grade tubular Nov 26, 2016 · So we’ve got a length of Kevlar shock cord and a fixed anchor point on our rocket. Supplies. Elastic is great for light weight (for 1-24oz weight rockets) applications and can stretch to 175% of length. It's wide base increases the area on the edge of the tube to make it harder for a zipper to start and propagate. Kevlar on end protects the nylon cord where it’s needed most, near the motor or ejection charges. Best is that it can always be cut off with a little bit of work. If the shock cord is too short (especially with Kevlar which is more rigid, or flat webbing vs tubular sleeves) it can't stretch to absorb the deployment shock and can also zipper the airframe. Made of 100% Dupont Kevlar Fiber, braided, 550 pound high strength, high toughness, excellent abrasion resistance, with high thermal stability. A third loop in the middle is for parachute attachment. Tubular Kevlar is the shock cord of choice when you want maximum strength for the least amount of weight (~4gr/meter). This Kevlar thread has a 2. Feb 15, 2025 · If you want to protect from Zippers, you use the Quest model rocket method of Kevlar cord and shock cord. Jul 18, 2022 · Why is Kevlar cord the way to go for attaching the shock cord to? It's obviously lightweight and strong, but also seems thin, which makes me believe that it would cut through the shock cord when under stress. This is the good stuff! Kevlar shock cords are specifically attached to the engine mount, and a thread of elastic is tied to the end of the Kevlar cord and tied to the nosecone. This is our PAC certified, custom-made 1/2 inch wide material. In this category, you can order braided Kevlar ropes and Kevlar cords. Shock cords are used to connect the nose cone to the body of the rocket. 25” 4,400lb Kevlar Covered Tubular Nylon Webbing Elasticity of nylon, fire protection of Kevlar for the best of both worlds! The first 5ft is covered in Kevlar/Nomex material with pure Kevlar thread. Most popular shock cord where a wide cord is needed, to prevent zippering, the wide nylon I used this cord as part of a rocket shock cord assembly on several rockets. 6mm (100lb~2,000lb) for various outdoor, indoor Some background: Kevlar was a great boon to model rocket shock cord assemblies when it was introduced in Quest kits. Sold by the foot All shock cords are Kevlar. This is the good stuff! May 28, 2015 · Quest kit instructions show a very simple overhand knot to join the Kevlar and Elastic ends of the shock cord. Also available as a pdf for printing on paper (click here). How can I seal the edges to prevent that? Melting them won't work and I hear epoxy (and CA?) makes the Kevlar brittle. Our 3/16" ( 2-32oz rockets) tubular nylon is an excellent choice (375# tensile strength) to replace either elastic or kevlar and has loops sewn into All Recovery Gear Harnesses Deployment Bags Parachute Liners Nomex Blankets CO2 Systems Recovery & Launch Hardware Recovery Tethers & Line Cutters Folding & Rigging Jigs We offer a variety of shock cord materials including Nylon, Spectra and Kevlar. com : emma kites 100% Kevlar Braided String Utility Cord 100Ft 500Lb High Strength, Abrasion/Flame Resistant, Tactical Survival Fishing Assist Cord Model Rocket Paracord Trip Line Kite Camping Cordage : Sports & OutdoorsAbout this item Kevlar Braided Line, Natural Yellow, 100% Kevlar Yarns, designed by EMMA KITES, providing 1mm~4. Cut to 20 feet long, and both ends sewn with loops for easy attachment.