Model rocket shock cord length In high power rocketry, it's imperative to think of it as what it is -- a harness . A "general rule of thumb" stating 3-5 x the total rocket length is followed by many of you because "it Our model rocket shock cords come in a wide variety for just about any application. Elastic I make normally 2 times the model length, just for safetytoo long and it can tangle. Middle or high power rockets should use tubular nylon at least 5 times the rocket length. How long should a shock cord be for a high power rocket? 3''? 4''? What is the diameter of the rocket? What is the length? What is the weight? Judging from the picture of your rocket, I would say that 4 yards of tubular kevlar is not enough. Our model rocket shock cords come in a wide variety for just about any application. - For larger rockets (over 5 lb/2. This shock cord provides a secur Model Rocket Shock Cord (Length, Material, How to Attach) The shock cord is an extremely important component of your model rocket. What I have found are opinions about cord lengths. 45 kg), a shock cord length of 2-3 times the rocket's length is sufficient. Apr 17, 2003 · Nylon and Kevlar shockcord should normally be 3-5 times the total length of the rocket. But it is a little vague on dual deployment; so is the 3X(Length of rocket) to be yet divided again for each deploy event, or does each deploy event get a 3X length of cord? In other words: (3X 11)/2=16. Your rocket appears to be 5. While not visible while the rocket is assembled, it plays a key role in the recovery of the flight. So here are the questions. 6 ounces : Number of Pieces : 1 : Model Name : 2278 Shock Cords and Mount Pack, for Model Rockets : Art Craft Kit Type : Model Rockets : UPC : 047776022782 : Global Trade Identification Number : 00047776022782 : Cartoon Character : Model Rocket : Manufacturer Model Rockets & How-To Rocketry Information Introducing our Aramid Shock Cord The ultimate solution for model rocketry enthusiasts seeking unparalleled strength and reliability. 27 kg), use a shock cord length of 3-5 times the rocket's length. Wadding Use enough wadding to fill 2 x the diameter of your BT. Elastic is great for light weight (for 1-24oz weight rockets) applications and can stretch to 175% of length. As previously mentioned, the two primary things you need to keep in mind when constructing your shock cord are the two forces it is built to withstand: the force of the components Oct 15, 2011 · I view it this way- if 3X is good then lets say that it applies best to the 10:1 or longer rockets, so pick an average 10:1 or longer rocket of the diameter in question, provide 3X the length, and use that in your short stubby rocket of similar diameter. From elastic to Kevlar to tubular nylon. The consensus on determining the length of the shock cord for your model rocket is that it should be three times as long as the body tube of the rocket itself. Kevlar (for 1-24oz rockets) has 220# tensile strength and is a great alternate choice for elastic. minimum) - then multiply that number by the *diameter* of the rocket in inches -- i. I would use about 25 to 30 feet of shock cord. Feb 4, 2025 · - For small rockets (less than 1 lb/0. Aug 2, 2009 · The trick is in the terminology -- from the model rocket world, we have "shock cord" which is elastic, and absorbs ejection load. Jul 24, 2013 · As far as 'rules of thumb' (as much as I don't like it), I would say, select a cord with a tensile strength somewhere between 50 and 100 times the weight of the rocket -- and (this simply recent thinking) use 5' as a 'unit length' (i. Length of model rocket shock cord Make shock cords for model rockets a minimum of 2 to 3 times the overall length of the rocket. - For medium-sized rockets (1-5 lb/0. Aug 2, 2009 · After an exhaustive search on line, including this forum, I am unable to find any formulas for calculating shock cord sizes, lengths, etc. Any more is probably overkill. 27 kg), use a shock cord length of 5-7 times the rocket's length. e. 45-2. As previously mentioned, the two primary things you need to keep in mind when constructing your shock cord are the two forces it is built to withstand: the force of the components Jan 1, 2018 · Estes Rockets 2278 Shock Cords and Mount Pack, for Model Rockets : Item Weight : 1. Mar 4, 2017 · Some have said that 1/8'' is okay then others say no less than 1/4'' kevlar on a rocket that size. Crafted with precision, this braided cord boasts an impressive 100-300 pound test strength, ensuring the utmost durability for your high-flying ventures. 5" in diamter and about 6' tall. From elastic to Kevlar to Tubular Nylon. I have built a lot of rockets and I always feel uneasy about the shock cord length and size, so let's start a discussion and agree on a standard. Short heavy rockets are going to need a much longer cord, long light rockets will need a much shorter cord. Apr 16, 2022 · Whether the attachment point is the baffle or the engine mount, with a shock cord recommendation length range of 3-4 times the length of the rocket's body, the difference will be negligible. You generally want your shock cord to be a multiple of your entire rocket's length, usually 3-5x. Jan 31, 2022 · In my search, 3X the length of your rocket is an accepted 'rule-of-thumb' length for shock cord design. 5 or 2X(3X 11)= 66 Model Rockets & How-To Rocketry Information. But remember, just like stability measurements this is based on rockets of standard fineness ratio, and standard weight per length. 1" rocket = 5ft -- 4 The consensus on determining the length of the shock cord for your model rocket is that it should be three times as long as the body tube of the rocket itself. ghzv sijea ffccgp nuqhxo izabe vbzb xabfb lkbqef gqh ieldrj