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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 -
Making Arrows Ronald A
Fact Sheet 6 Making Arrows Ronald A. Howard Jr.* Many archers enjoy making increase arrow mass. Wooden been exposed to the graphite their own arrows because it shafts must be lacquered or fibers. Those fibers are hard, allows them to exercise painted full length to protect stiff and fine. They survive personal quality control, add them from moisture. cooking well and can cause injury if swallowed. Many special features, personalize the Fiberglass shafts are lighter than target archers, particularly arrows in other ways or add to wooden shafts of the same spine those shooting bows equipped their shooting enjoyment. weight. They remain relatively with overdraws, prefer graphite Making arrows involves straight, and they can be matched shafts. several steps, but it is not in spine and arrow mass much difficult. High quality arrows better than wooden shafts. Aluminum shafts have been the can be made with care and Although fiberglass is a tough standard of both target archers attention to detail. material, these shafts are subject and bowhunters for many Shaft Selection to splitting on impact. They also years. The shafts can be made tend to shatter or splinter if to very close tolerances in a The first step is selecting the variety of alloys, offering easy shaft type and size desired. struck along their length. Shafts with internal damage may even matching in spine and weight. Arrow shafts are available in Aluminum shaft materials may wood, fiberglass, graphite, shatter during a release. Fiberglass has been an excellent be obtained in inexpensive soft aluminum and graphite- alloys that are easily bent or aluminum combinations. -
FITA Level 1 Coaching Guide
COACHES MANUAL ENTRY LEVEL http://www.archery.org FITA Coaches Committee Coaching Manual - Entry Level Table of Content s Introduction Chapter 1 The archer’s skills Chapter 2 S teps of the Shooting Sequence Chapter 3 Safety Chapter 4 Archery Classes and Entry level Program Chapter 5 Common Problems Chapter 6 Coach’s Role Chapter 7 Teaching suggestions for the Coach Chapter 8 Tip s for your demonstration, organization and present ation Chapter 9 Tip s for practice planning Chapter 10 Some suggested Teaching exercises Chapter 11 Facilities for group instruction Chapter 12 The disabled archer Chapter 13 Games COACHING MANUAL Glossary COACHING MANUAL Dear Coaches and Friends, As President of FITA, I am very pleased with the results of the hard work of the Coaches Committee, the FITA office and all those coaches who have contributed to this valuable manual. FITA now has an updated coaching manual that will unify the basic coaching knowledge of the best coaches in the world. It is important that a uniform method be used at the basic level to give all new enthusiasts a well-tested foundation of the best archery practices. Archers will be able to go from this level to that of a recreational, national or international participant, building on this basic training with intermediate and expert coach- ing. My special thanks to Juan Carlos Holgado, Coaches Committee Chairman and Pascal Colmaire, FITA Development Director for their great effort and knowledge to write and compile this manual. Best regards, Jim Easton President COACHING MANUAL ere is the first coaching manual of the Federation Internationale de Tir àl'Arc (FITA). -
Manual Level 1 (01-01-2018).Pdf
Page 1 of 76 The following Basic Archery Instructors Manual provides general guidelines and that local regulation may prevail in each member nation. The IFAA accepts no responsibility or liability of any damage to property or injury to people in the application of this Guide/Manual. Welcome to Field archery This is the first step in enjoying the many facets of this great sport. Your archer may choose to be involved in: Field Archery 3D Archery Indoor Archery Competition and Travel Hunting Or just the social side of this great sport. Out of this your archer will almost certainly achieve pleasure, relaxation, friendship and fitness. We hope that this will be the beginning of a long and enjoyable relationship with the sport of archery in its many forms. So it is up to you as the instructor to help this happen. This book will help give your archers an insight into what Field archery is all about; from the basic structure of an archery club to the basic skills required to enjoy this sport. This course will teach you to be a safe and effective basic archery instructor. You will also learn how to run a safe program, how to select and maintain proper equipment and how to teach beginning archers in a club setting. ****** Page 2 of 76 Contents The International Field Archery Association ........................................................................................................5 1. Clubs .............................................................................................................................................................5 -
ANZ Shooting Rules 2018
Archery NZ Shooting Rules 2018 Contents INTRODUCTION ....................................................................................................................................... 4 BOW SAFETY ........................................................................................................................................... 4 1. Notes ............................................................................................................................................... 4 2. General ............................................................................................................................................ 4 Shooting Rules ........................................................................................................................................ 5 1 RECOGNISED CATEGORIES ............................................................................................................... 5 1.1 Archers’ Equipment .................................................................................................................. 5 1.2 Classes ....................................................................................................................................... 5 2 SHOOTING RULES APPLICATION ...................................................................................................... 5 2.1 Application ................................................................................................................................ 5 2.2 Archers with disabilities ........................................................................................................... -
170928 Kapro Catalogue.Pdf
About Kapro Kapro is a leading manufacturer and developer of innovative hand tools for the professional and DIY markets. Kapro make the industry’s finest quality spirit levels, laser levels, layout marking and measuring tools. The company has built a reputation as the industry’s foremost innovator, and is renowned for its quality products, outstanding service, added value and cutting-edge designs. Global Distribution Network ABOUT KAPRO Kapro is a major global player in its category. Headquartered in Kadarim Israel, Kapro operates facilities in Israel, China and the USA – all wholly owned by Kapro Industries. Our network of distribution partners has created a leading market presence in over 60 countries, throughout Europe, the Americas and Asia, and in Australasia and Africa. Innovation & Design Kapro’s systematic approach to innovation has given the market some of its most ground-breaking features and products. Our market-changing patented designs include the Plumb Site® Dual-View™ vial, Optivision™ Red, Postrite® Folding Post Level and Topgrade™ Gradient Level. Kapro’s Plumb Site® Dual View™ vial is the only level feature to provide a front-on view of the plumb vial, eliminating parallax error as well as the neck and back strain that usually accompany vertical leveling jobs. In 2010, Kapro introduced Optivision™ Red that creates a strong colour definition around the spirit levels horizontal bubble, making it the clearest and most visible vial available. To date, Kapro has registered over 100 patents throughout the world on its products and features Kapro’s unique designs are highlighted by their sleek, stand-out red look, eye-catching graphics, simplicity of design and innovative packaging. -
Tuning 4 Barebow
Page 1 Tuning T4T Copyright 1993 for T4BB Copyright 2018 All Rights Reserved By Rick Barebow Stonebraker https://texasarchery.org/resources/39-tunning 6/19/2018 Page 2 FOREWORD This manual is a guide to basic barebow tuning and only addresses the most common styles to help archers get started tuning their bows and arrows. You should adapt the techniques described in this manual to your chosen style. More complex matters are left to the reader's experimentation. Barebow tuning is not as straight-forward as recurve tuning due to the many different styles of barebow archery. There are significant differences in where a barebow archer anchors and where they place their fingers on the string. These differences separate Face Walkers from String Walkers and from Traditional archers. Underlined terms are explained in the Glossary on page 15. See Appendix on page 16 for various styles and advantages/disadvantages. An important part of archery is the equipment. The skill of the archer is also important but if the bow is not properly tuned, the archer's skill is obscured. Tuning may be achieved in a short period but in most cases, will take longer. The archer that puts the most time and effort into equipment will have the most success, which will be time well spent. There are several steps to tuning a recurve style barebow. Always set the brace height as specified by the manufacturer before you set t h e nock- point. Changing the brace height will affect the proper nock point, which is the starting point of tuning a bow. -
The Arrow Shafts Is Pseudosasa Japonica Or Commonly Called Japanese Arrow Bamboo
The Japanese Arrow By Godai Katsunaga Intorduction The Ya, or arrow of Japan and was between 34 and 38 inches in length, made of fire hardened bamboo shafts and had a steel arrow head., During this period and earlier arrows used in combat were often marked to identify who owned them, this allowed samurai to get the proper credit for killing an opponent. Period Construction The bamboo used for the arrow shafts is Pseudosasa japonica or commonly called Japanese arrow bamboo. This bamboo grows in slender culms that are packed tightly together, forming a dense hedge, with large, dark green foliage. It is a tough and versatile bamboo that will thrive in shade and in sun while growing to about 15 foot tall and was common throughout Japan. Farmers and other workers harvested the bamboo in the early winter when the plants saps were down. To get the required diameter need to make arrows the plants that were between two and three years in age were preferred. After harvesting, the best bamboo was hand selected and ideally stored for about a year for drying, allowing most of the moisture in the plant material to evaporate. Preparation of each shaft included having the nodes shaved off and then softening the shaft by placing it in hot sand prior to straightening it by hand. After the shafts were straightened, they were exposed to high heat to remove any remaining moisture and harden the natural sugars, creating a stronger bond of the natural fibers; this was known as fire hardening. Fletching was done with hawk, eagle, crane or pheasant tail feathers and could be either three or four flights depending on the arrow head that would be mounted. -
World Crossbow Shooting Association - TARGET, STANDARD, FREESTYLE & MEDIEVAL CROSSBOW RULES
World Crossbow Shooting Association - TARGET, STANDARD, FREESTYLE & MEDIEVAL CROSSBOW RULES WORLD CROSSBOW SHOOTING ASSOCIATION SHOOTING RULES FOR TARGET, MEDIEVAL, STANDARD, FREESTYLE CROSSBOWS AND GENERAL SHOOTING RULES. EFFECTIVE 1st January 2019 Effective, 1st January 2019 Page: 1 World Crossbow Shooting Association - TARGET, STANDARD, FREESTYLE & MEDIEVAL CROSSBOW RULES INDEX Clause Item Page No INDEX ................................................................................................................................................................................. .................. 2 DEFINITIONS ...................................................................................................................................................................................... 6 SECTION 1. WORLD CHAMPIONSHIPS, REGINAL CHAMPIONSHIP, JUDGING, RECORDS, ASSISTED SHOOTERS 1 PRECEDENCE, INTERPRETATION AND AMENDMENTS ..................................................................................................... 9 2 WORLD CHAMPIONSHIPS ...................................................................................................................................................... 9 2.1 Outdoor Target ................................................................................................................................................................ 2.2 3D ................................................................................................................................................................................... -
Specification of Spirit Level (For Use in Box Type Gauge Cum Level)
109 317359/2020/O/o PED/TMM/RDSO ISO: 9001-2015 Document No.: TM-52 Revision 01 Date Effective From:--/--/---- Document Title: Specification of Spirit Level (For use in Box type gauge cum level) SPECIFICATION OF SPIRIT LEVEL (For use in Box type gauge cum level) (No.TM-52 Dt.24.05.2000) First Revision, October-2020 Track Machines & Monitoring Directorate RESEARCH DESIGNS AND STANDARDS ORGANISATION Manak Nagar, Lucknow-226011 JRE/SSE/SSRE ARE/DTM/EDTM PEDTM Page 1 of 8 Prepared By: Checked By: Issued By 110 317359/2020/O/o PED/TMM/RDSO ISO: 9001-2015 Document No.: TM-52 Revision 01 Date Effective From:--/--/---- Document Title: Specification of Spirit Level (For use in Box type gauge cum level) 1.0 SCOPE: This specification covers the essential dimensional, functional and material characteristics with method of testing and accuracy of the spirit level. The spirit level is used to define a reference horizontal plane to compare the horizontality of the base of the spirit level with the plane containing the touching surfaces of the rail seatings of the gauge-cum-level. 1.1 Preference to make in India: compliance of the instruction contained in public procurement (preference to make in India) order -2017 “Make in India” shall be ensured or latest instructions issued on subject shall be ensured. 1.2 All the provisions contained in RDSO’s ISO procedures laid down in Document No. QO- D-8.1-11 dated 12.09.2018 (titled Vendor – Changes in approved status”), subsequent versions / amendments thereof shall be binding, and applicable on the successful manufacturers/suppliers in the contracts floated by Railways to maintain quality of products supplied to Railways. -
Schut for Precision
Schut for Precision Protractors / Clinometers / Spirit levels Accuracy of clinometers/spirit levels according DIN 877 Graduation Flatness (µm) µm/m " (L = length in mm) ≤ 50 ≤ 10 4 + L / 250 > 50 - 200 > 10 - 40 8 + L / 125 L > 200 > 40 16 + / 60 C08.001.EN-dealer.20110825 © 2011, Schut Geometrische Meettechniek bv 181 Measuring instruments and systems 2011/2012-D Schut.com Schut for Precision PROTRACTORS Universal digital bevel protractor This digital bevel protractor displays both decimal degrees and degrees-minutes-seconds at the same time. Measuring range: ± 360 mm. Reversible measuring direction. Resolution: 0.008° and 30". Fine adjustment. Accuracy: ± 0.08° or ± 5'. Delivery in a case with three blades (150, 200 Mode: 0 - 90°, 0 - 180° or 0 - 360°. and 300 mm), a square and an acute angle On/off switch. attachment. Reset/preset. Power supply: 1 battery type CR2032. Item No. Description Price 907.885 Bevel protractor Option: 495.157 Spare battery Single blades Item No. Blade length/mm Price 909.380 150 909.381 200 909.382 300 909.383 500 909.384 600 909.385 800 C08.302.EN-dealer.20110825 © 2011, Schut Geometrische Meettechniek bv 182 Measuring instruments and systems 2011/2012-D Schut.com Schut for Precision PROTRACTORS Universal digital bevel protractor This stainless steel, digital bevel protractor is Item No. Description Price available with blades from 150 to 1000 mm. The blades and all the measuring faces are hardened. 855.820 Bevel protractor Measuring range: ± 360°. Options: Resolution: 1', or decimal 0.01°. 495.157 Spare battery Accuracy: ± 2'. 905.409 Data cable 2 m Repeatability: 1'. -
Tenpoint Crossbow Technologiestm OWNER's General Instruction Manual
TenPoint Crossbow TechnologiesTM OWNER’s GENERAL INSTRUCTION MANUAL To prevent injury to yourself or others, or damage to your crossbow, read this manual along with all other operating and safety instructions included in your crossbow package before assembling, loading or using the crossbow. THIS MANUAL COVERS: Safety Instructions 1-3 Cocking & Loading 3-4 Unloading Your Crossbow 4 Using the Correct Arrow 5-6 Sighting Your Crossbow 6-9 Crossbow Maintenance & Care 9-10 Crossbow Troubleshooting 10-12 Returning Your Crossbow for Service 12 String & Cable Adjustment Chart 13 String & Cable Specifications 14 Notes 14 Limited Operational Warranty 15 TenPoint Crossbow Technologies® 1325 Waterloo Road Mogadore, OH 44260-9608 330.628.9245 www.tenpointcrossbows.com WARNING: (READ FIRST) To prevent injury to yourself or others, or damage to your crossbow, read this manual along with all other operating and safety instructions included in your crossbow package before assembling, loading or using the crossbow. SAFETY INSTRUCTIONS Follow these strict and absolute safety rules when cocking, loading, pointing, and shooting your crossbow. • Install the GripGuard on thumbhole-style stocks prior to sighting-in or shooting your crossbow (not applicable on the Vapor or Stealth SS). DANGER Note: If you have misplaced or lost the GripGuard, contact TenPoint at www.tenpointcrossbows.com or by calling 330-628-9245 immediately for a replacement. • Never allow your fore-grip hand’s fingers or thumb to move above the barrel’s flight deck or into the bowstring or cables’ release path (photos 1, 2 & 3). If you do, you will injure yourself severely when you fire your crossbow.