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On the Mechanics of the Bow and Arrow 1
On the Mechanics of the Bow and Arrow 1 B.W. Kooi Groningen, The Netherlands 1983 1B.W. Kooi, On the Mechanics of the Bow and Arrow PhD-thesis, Mathematisch Instituut, Rijksuniversiteit Groningen, The Netherlands (1983), Supported by ”Netherlands organization for the advancement of pure research” (Z.W.O.), project (63-57) 2 Contents 1 Introduction 5 1.1 Prefaceandsummary.............................. 5 1.2 Definitionsandclassifications . .. 7 1.3 Constructionofbowsandarrows . .. 11 1.4 Mathematicalmodelling . 14 1.5 Formermathematicalmodels . 17 1.6 Ourmathematicalmodel. 20 1.7 Unitsofmeasurement.............................. 22 1.8 Varietyinarchery................................ 23 1.9 Qualitycoefficients ............................... 25 1.10 Comparison of different mathematical models . ...... 26 1.11 Comparison of the mechanical performance . ....... 28 2 Static deformation of the bow 33 2.1 Summary .................................... 33 2.2 Introduction................................... 33 2.3 Formulationoftheproblem . 34 2.4 Numerical solution of the equation of equilibrium . ......... 37 2.5 Somenumericalresults . 40 2.6 A model of a bow with 100% shooting efficiency . .. 50 2.7 Acknowledgement................................ 52 3 Mechanics of the bow and arrow 55 3.1 Summary .................................... 55 3.2 Introduction................................... 55 3.3 Equationsofmotion .............................. 57 3.4 Finitedifferenceequations . .. 62 3.5 Somenumericalresults . 68 3.6 On the behaviour of the normal force -
August 2012 NTA Newsletter Final
Volume 3 August Issue 4 2012 The Nebraska Traditional Archer 2012 Calendar of Events Jan 14, 2012, Saturday, 9:00am – Noon Jun 9, 2012, Saturday, 9:00am – Noon NTA Monthly Meeting NTA Monthly Meeting Izaak Walton Park, Fremont, NE Izaak Walton Park, Fremont, NE Jan 20 – 22, 2012 Jun 10, Sunday 8:00am - 4:00pm River City Hunting Fishing RV Boat Expo, NTA Exhibit Grant Hoefener Memorial 3-D Shoot Mid America Center, Council Bluffs, IA Schram Park Archery Range, Gretna, NE Jan 27 – 29, 2012 Jun 15 – 17, 2012 Big Buck Classic, NTA Exhibit Booth Compton Traditional Bowhunters Rendezvous Quest Center, Omaha, NE Berrien Springs, Michigan Jan 27 – 29, 2012 Jul 14 – 15, 2012, Saturday, 8am – 6pm, Sunday 8am – 3pm Kalamazoo Traditional Archery Expo Nebraska BOJAM – 17 th Annual Bow Building Jamboree Kalamazoo, MI Izaak Walton Park, Fremont, NE Feb 4, 2012, Saturday, 9:00am (snowed out, moved to Mar 17) Jul 15, Deadline for Aug Newsletter NTA Dart Shoot and Swap Meet D B Archery, Platte Center, NE Jul 19 – 22, 2012 Missouri 14 th Annual Ozarks Self Bow Jamboree, MOJAM Feb 11, 2012 Marshall, MO Annual Game Feed Izaak Walton Park, Fremont, NE Jul 26 – 29, 2012 Eastern Traditional Archery Rendezvous Feb 25, 2012, Saturday, 5:00pm Denton Hill, PA NTA Annual Meeting, Elections and Banquet Izaak Walton Park, Fremont, NE, Large Lodge Aug 3 – 5, 2012 NBA Jamboree Feb 24 – 26, 2012 Nebraska National Forest, Halsey, NE Compton Traditional “Pre-Spring Arrow Fling” Tannehill Historical State Park, McCalla, Alabama Aug 11, 2012, Saturday, 9:00am – Noon Terry -
Carolina Traditional Archers the Whispering Shaft
January/February/March 2011 The Whispering Shaft Quarterly Newsletter of the Carolina Traditional Archers Keeping The Tradition Alive www.thecta.orgwww.thecta.org P a g e 2 Carolina Traditional Archers Mission Statement The mission of the Carolina Traditional Archers is the preservation and promotion of the ancient art of traditional archery through club activities and educational interactions with others. Members will adhere to the highest ethical standards in their support, practice, promotion and preservation of traditional archery and bow hunting. The Carolina Traditional Archers support sound wildlife manage- ment principles and seek opportunities to aid conservation efforts. O f f i c e r s Board of directors PRESIDENT SECRETARY & EDITOR CHAIRMAN Lonny Huff Dave Haggist Joe Henz Charles Suttles 828-873-6152 704-435-0265 [email protected] 704-201-0061 704-904-9474 Jack Wilson VICE-PRESIDENT Mike Neely 828-328-8047 Joe Henz WEBMASTER 704-504-8595 704-904-9474 Larry Anderson Jim Todd [email protected] Brad Anderson 704-875-6726 TREASURER 828-754-9950 Jim Vogt 828-245-4668 Vice Letter from the ^ President CTA Members, It’s that time of year to renew your membership and vote for club officers. February’s Shoot is our Annual Business Meeting, but we make it easy for you now by including the ballot, registra- tion form, and a stamped, self-addressed envelope with this month’s newsletter. Your input is also appreciated on the Survey. Our first workday of the year will be Saturday, January 22. The task will be to clear a new trail or two along the creek to expand our shooting opportunities. -
Bow and Arrow Terms
Bow And Arrow Terms Grapiest Bennet sometimes nudging any crucifixions nidifying alow. Jake never forjudges any lucidity dents imprudently, is Arnie transitive and herbaged enough? Miles decrypt fugato. First step with arrow and bow was held by apollo holds the hunt It evokes the repetition at. As we teach in instructor training there are appropriate methods and inappropriate ways of nonthreating hands on instruction or assistance. Have junior leaders or parents review archery terms and safety. Which country is why best at archery? Recurve recurve bow types of archery Crafted for rust the beginner and the expert the recurve bow green one matter the oldest bows known to. Shaped to bow that is lots of arrows. Archery is really popular right now. Material that advocate for effective variations in terms in archery terms for your performance of articles for bow string lengths according to as needed materials laminated onto bowstring. Bow good arrow Lyrics containing the term. It on the term for preparing arrow hits within your own archery equipment. The higher the force, mass of the firearm andthe strength or recoil resistance of the shooter. Nyung took up archery at the tender age of nine. REI informed members there free no dividend to people around. Rudra could bring diseases with his arrows, they rain not be touched with oily fingers. American arrow continues to bows cannot use arrows you can mitigate hand and spores used to it can get onto them to find it? One arrow and arrows, and hybrid longbows are red and are? Have participants PRACTICE gripping a rate with sister light touch. -
The Design of the Bow 1 B.W
The Design of the Bow 1 B.W. Kooi Abstract The invention of the bow and arrow probably ranks for social impact with the inven- tion of the art of kindling a ¯re and the invention of the wheel. It must have been in prehistoric times that the ¯rst missile was launched with a bow, we do not know where and when. The event may well have occurred in di®erent parts of the world at about the same time or at widely di®ering times. Numerous kinds of bows are known, they may have long limbs or short limbs, upper and lower limbs may be equal or unequal in length whilst cross-sections of the limbs may take various shapes. Wood or steel may be used, singly as in `self' bows, or mixed when di®erent layers are glued together. There are `composite' bows with layers of several kinds of organic material, wood, sinew and horn, and, in modern forms, layers of wood and synthetic plastics reinforced with glass¯bre or carbon. The shape of the bow when relaxed, may be straight or recurved, where the curvature of the parts of the limbs of the unstrung bow is opposite to the way they are flexed to ¯t the string. In previous papers we have dealt with the mechanics of the bow and arrow. The main subject of this paper is the design and construction of bows. Nondimension- alization of the problem leads to the introduction of the maximum elastic energy storage capacity per unit of mass as a material constant for strength. -
The Back Street Bowyer Introduction This Guide Is Aimed at Someone
The Back Street Bowyer www.alanesq.com v2.61 – Sep 10 Introduction This guide is aimed at someone who fancies having a try at making themselves an English longbow but who has no idea how to go about it (even if you have no woodworking experience at all) i.e. In exactly the same position I was in myself not so long ago I should point out that I have no training in the subject and most of what I am passing on here is either what people on forums have kindly passed on to me or I have figured out myself through trial and error. I strongly suspect much of what I say here will cause a real bowyer to laugh out loud, but what I can say is that using these methods I have made several bows ranging from 45lb at 28” to 160lb at 32” at a maximum cost of £40. Although the guide takes you through making a self bow with chased growth ring, I would actually recommend that for a first bow you consider making a laminate or a self bow turned through 90 degrees (both explained later in this guide) as they are very much easier to make So if you want to make yourself a working bow as cheaply and simply as possible then this is the guide for you. If you want to learn the traditional techniques then this may not be for you? but you could consider attending a course like the ones run by www.diyarchery.co.uk or www.tradlongbows.co.uk All the longbows I have made are the traditional medieval style of English longbow i.e. -
Hoyt Recurve Bow Limited Lifetime Warranty
593 North Wright Brothers Drive | Salt Lake City | Utah | USA | 84116-2887 Phone 801-363-2990 | Fax 801-537-1470 | www.hoyt.com Follow us on Twitter! Like us on Facebook! www.twitter.com/hoytarcheryinc www.facebook.com/HoytTargetArchery www.facebook.com/HoytBowhunting Follow us on Instagram! Subscribe to us on YouTube! www.instagram.com/HoytTargetArchery youtube.com/hoytarcheryinc www.instagram.com/HoytBowhunting HOYT RECURVE BOW LIMITED LIFETIME WARRANTY Hoyt recurve handles are guaranteed against manufacturing defects in materials and workmanship to the original owner for the life of the product*. *Visit www.hoyt.com/warranty for complete warranty details or see warranty policy in owner’s manual. Official Bow Partner of World Archery RECURVE OWNER’S MANUAL WELCOME TO TEAM HOYT. Congratulations on the purchase of your new Hoyt Recurve product. We are excited and grateful to have you as a part of Team Hoyt. You will be pleased to know that you have purchased the most technologically advanced and dependable product on the market. Only the finest components go into every Hoyt bow along with over 85 years of industry leading experience in bow technology and manufacturing. With proper use and some basic maintenance, your new Hoyt Recurve prod- uct will provide you with years of great shooting and dependability. Archery is a very enjoyable form of recreation for people of all ages and abilities. It is import- ant to note that archery equipment, when not used properly, can create a dangerous situation, including death and serious personal injury for the archer or those around them. It is up to you to be a responsible archer protecting both you and others when enjoying this great sport. -
Shirley Cave and Norman Kerber Wed Saturday Eve Dr. Barnhizer Dies
X Shirley Cave and Norman Kerber Wed Saturday Eve Mis* Shirley Marie Cave of The modified bell skirt accented Seven Fountains, Va. and Nor at waistline with a toft fold end man Leonard Kerber of Washing tng in a boar in the back. Her NUMBER 49 ton. D. C. were m arriad Saturday, headdress was of matching peau- NINETY-FIRST YEAR CHATSWORTH, ILLINOIS, THURSDAY, AUGUST 5, 1956 July 31 at 7 pjn. at the First de-soie with a complexion veil. Brethren Church at Winchester, She carried a nosegay of match Va. The Rev. Paul EL Dick of ing carnations. Winchester officiated at the dou Mrs. Faye Cullen of Front Plans To Open Junior College Pontiac Band To ble ring ceremony before an altar Royal. Va. and Miss Ellen Croaon of snapdragons, mums, palms and of Arlington, Va. served as brides candelabra. maids and were dressed identical At Pontiac September, '66 Give Concert Mrs. Paul E Dick of Winches to the matron of honor. Efforts to establish a Junior col has said, “Many young people with ter was organist and acocmpauiied Michael Kerber of Chatsworth lege In Living*ton County are well potentiality need the personal Aug. 11th Mrs. Donna Powell of Waterlick, served his brother - as best man under way, according to informa guidance program which a private soloist. and Paul Villemaire and Debnus Junior College can offer.” Arthur O. Walter states that he tion presented a^ a meeting In has secured another fro* band Parents of the couple are Mr. Smith both of Washington, D. C. Pontiac Friday evening. -
Arrow Selection
ARROW SELECTION USING THE TARGET ARROW SELECTION CHART LOW POUNDAGE 1. Once you have determined your Correct Target Arrow Length and Calculated or Actual Peak YOUR ARROW LENGTH RECURVE BOW Bow Weight, you are ready to select your correct shaft size: Bow Weight–lbs. Finger Release 1.A Compound bows. In the "Calculated Peak Bow Weight" column (left-hand side of the 21" 22" 23" 24" 25" 26" 27" chart), select the column with the type of cam on your bow. Locate your Calculated Peak Bow Weight in that column. 16–20 lbs. 1.B Recurve bows and Modern Longbows. In the "Recurve Bow Weight" column (right-hand (7.3–9.1 kg) Y1 Y1 Y2 Y3 Y4 side of the chart), select the column with the bow type. Next, locate your Actual Peak Bow Weight in that column. 20–24 lbs. Y1 Y1 Y2 Y3 Y4 Y5 2. Move across that bow-weight row horizontally to the column indicating your Correct Arrow (9.1–10.9 kg) Length. Note the letter in the box where your Calculated or Actual Peak Bow Weight row and 24–28 lbs. Correct Target Arrow Length column intersect. The "Shaft Size" box below the chart with the (10.9–12.7 kg) Y1 Y1 Y2 Y3 Y4 Y5 Y6 same letter contains your recommended shaft sizes. Select a shaft from the chart depending on the shaft material, shaft weight, and type of shooting you will be doing. 28–32 lbs. (12.7–14.5 kg) Y1 Y2 Y3 Y4 Y5 Y6 Y7 SELECTING THE CORRECT TARGET SHAFT SIZE Our Target Shaft Selection Chart will help you find the perfect shaft match for your bow—quickly and 32–36 lbs. -
ARCHERY 101 FUNDAMENTALS of ARCHERY During the Course the Instructor Will Review, Archery Safety, Shooting Form, and Types of Equipment
2012 ARCHERY 101 FUNDAMENTALS OF ARCHERY During the course the Instructor will review, archery safety, shooting form, and types of equipment. Archery 101 Page 1 Texas Archery Academy www.texasarcheryacademy.org Archery 101 Course Curriculum This Archery 101 course consists of four sessions, each being one hour. Archery 101 introduces archery safety, shooting form, archery styles, equipment and scoring rules. Each session offers “show and tell” discussion for fundamental archery education. The majority of each class is just a lot of FUN shooting, but with structured drills and practice, along with skills. Students learn a neutral style of archery that builds the basics of a solid shooting form. Easy to use equipment allows skill progress, without emphasis on strength or gender. The program curriculum uses the JOAD/AAA training and awards system, a nationally recognized archery program developed by USA Archery and the international FITA “Feathers and Arrows” archery education program. This combination is the first step in a “black belt” style, self-paced, achievement program in target archery. Regular group classes combine fundamental archery education curriculum and shooting skill development. Along the way to completion, the archer will achieve three award pin levels: Green, Purple and Gray. Each has a shooting proficiency test and education curriculum. Page 1 Texas Archery Academy www.texasarcheryacademy.org Archery 101 Introduction Welcome to Archery! Through the ages, this primitive weapon has fed families, conquered civilizations, and provided a wonderful source of recreation. As a martial art, archery helps build self-confidence and control. As a sport, it ranks with golf as a challenge to building individual skill. -
Dynamics of the Bow and Arrow
EN 4: Dynamics and Vibrations Brown University, Division of Engineering LABORATORY 1: DYNAMICS OF THE BOW AND ARROW Compound Bow Recurve Bow Long Bow SAFETY You will be testing three very powerful, full sized bows. The bows release a lot of energy very quickly, and can cause serious injury if they are used improperly. • Do not place any part of your body between the string and the bow at any time; • Stand behind the loading stage while the arrow is being released; • Do not pull and release the string without an arrow in place. If you do so, you will break not only the bow, but also yourself and those around you! 1. Introduction In Engineering we often use physical principles and mathematical analyses to achieve our goals of innovation. In this laboratory we will use simple physical principles of dynamics, work and energy, and simple analyses of calculus, differentiation and integration, to study engineering aspects of a projectile launching system, the bow and arrow. A bow is an engineering system of storing elastic energy effectively and exerting force on the mass of an arrow efficiently, to convert stored elastic energy of the bow into kinetic energy of the arrow. Engineering design of the bow and arrow system has three major objectives; (1) to store the elastic energy in the bow effectively within the capacity of the archer to draw and hold the bow comfortably while aiming, (2) to maximize the conversion of the elastic energy of the bow into the kinetic energy of the arrow, and (3) to keep the operation simple and within the strength of the bow and arrow materials system. -
Archer's Reference Guide (Recurve)
Archer's reference guide (recurve) Balbardie Archers Editor: Murray Elliot [email protected] Edition: 1 Issue Date: 17 April, 1999 Copyright ©1999 All information contained herein and copyright remains with the original authors. No part of this document may be reproduced in part or in whole for any form of gain or profit without the prior consent of the authors. 2 1 FOREWORD......................................................................................................................................................................... 5 2 EQUIPMENT........................................................................................................................................................................ 5 2.1 BOWS.................................................................................................................................................................................5 2.1.1 Technical terms for beginners............................................................................................................................ 5 2.1.2 Risers....................................................................................................................................................................... 6 2.1.3 Limbs....................................................................................................................................................................... 8 2.1.4 Strings....................................................................................................................................................................