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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 -
Shooting the Longbow
Shooting the Longbow Some coaching tips Steve Purkiss (Fox Archers) Equipment Bows Longbows, being made from wood, need to be protected from the elements. Even a “varnished” bow can let in moisture due to marks and scratches from regular use. Polish the bows with a wax polish, Danish Oil or even a smear of vaseline to help keep out the wet which can ruin your bow. Pay special attention to the area where the arrow “passes” the bow as obvious wear will take it down to exposed wood. Also keep the string waxed, most modern strings are fairly waterproof but as the string is twisted and the strands rub against each other under tension waxing helps cut down wear. Apply wax to the string and then rub with a small piece of leather this warms the wax and string and helps the wax to move between the strands. If you are used to shooting a recurve bow then you will find that the draw weight of a longbow feels different to a recurve simply due to the nature of the beast and therefore if you are used to a 30lb recurve you might find a 35lb longbow comfortable. The bracing height of the bow is the distance from the string to the belly of the bow (the part of the bow facing you when you hold it to shoot). This is often written on the bow (normally 5.5” to 6.5”) set your bow up to this height for optimum performance. Always “warm up” your bow before you shoot, this is done by rubbing the bow with a cloth and then repeatedly drawing the bow to half draw and gradually increasing to full draw either in the normal manner of by putting your foot against the grip and holding the string then you can use you foot and hand to extend the bow. -
Coaches Manual
CHAPTER 9: EQUIPMENT & FACILITIES 9.1. PRELIMINARIES For an archery course to be successful, there are certain items that must be available, in Upper limb good condition and ready for each lesson. The coach must have the knowledge to properly String set up and maintain the equipment throughout the program. Arrow rest Centre serving The coach must also progressively introduce and explain the equipment to the novices. Take Nocking point Hand position care to not overburden them with too much information at once. Back of the bow Bracing height Since a certain proportion of athletes are left Front of the bow handed, about 20% of the available equipment Lower limb should be for those who will shoot left handed and the rest for the right handed archers in the group. In some countries, and among some ethnical groups, this percentage has to be strongly modified. Most modern entry-level bows are takedown 9. 2. SHOOTING SIDE recurves – i.e. the limbs can be removed from Since some shooting accoutrements are specific the riser and used in a right or left handed to the shooting side, each novice’s shooting riser. side should be identified before selecting their equipment. The shooting side can be selected either according to dominant eye or by dominant (preferred) hand. However the shooting side is selected, be sure that the novice can aim with the eye on that side. This means that either the eye dominance matches the shooting side, or the archer can close the non-aiming eye without interfering with the shot. In a pinch, an eye patch can be used to cover the non-aiming eye. -
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.................................................................................................................................................................... -
Yumi and Ya: a Brief Survey of Japanese Archery
A.S. 47 XLVII ● Fall 2013 ● Vol. I ● Issue 3 A.S. 47 XLVII ● Fall 2013 ● Vol. I ● Issue 3 THE WAY WE WERE: SCA Archery: Origins & Evolution INSIDE: SSSIIIRRR JJJOOONNN FFFIIITTTZZZ RRRAAAUUUFFF::: Profile of a Living Legend How it Began: Inga’s Tale of SCA Target & Combat Archery The First SCA Combat Arrow ALSO THIS EDITION: Meet the Archers Yumi and Ya: A brief survey of Japanese Archery Thumb Rings Fire Across the River: Tactics for Combat Archers from the Senryaku A Study of Medieval and Renaissance Arrow Shaft Sizes The Medieval Archer’s Reading List Photo by Henry Jakl Thorunn Smallwolf (Breanne Crane) of Avacal, An Tir Winner of the Quad War Bow Competition THE WAY WE WERE A.S. 47 XLVII ● Fall 2013 ● Vol. I ● Issue 3 SCA Archery: Origins & Evolution In this Fall Edition (2013) of Quivers & Quarrels, we Inside this Issue: explore the origins and evolution of target and combat Meet the Archers............................................................1-2 archery in the SCA. Sir Jon Fitz Rauf: Profile of a Living Legend ......3-5 New in this edition: Meet the Archers, featuring photos and bios of local archery stars of all ages. Also, be Yumi and Ya: A brief survey of Japanese Archery 6-11 sure to read about Sir Jon Fitz Rauf, the godfather of Warbows have come to Avacal (An Tir)!........... 12-13 SCA archery, and a regular contributor to this publication. Thumb Rings............................................................. 14-15 This is the official quarterly publication of The Archery How it Began: Inga’s Tale of SCA Target & Combat Community of the Society for Creative Anachronism, Inc. -
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?WMRK XLI /RKPMWL PSRKFS[ + VGLIVW HY 1IRIZSMW www.toxophilus.org Security when shooting a bow Archery is a potentially dangerous sport which must only be carried out in an appropriate place reserved for such activity with correct supervision. We decline all responsibility for damage and/or accidents which occur as a result of putting any of the activities described in this tutorial into practice. Shooting line When shooting in a group, it is important that all archers remain behind (or astride in the case of a competition) a visible (or imaginary) line while arrows are being shot. Crossing the line towards the targets during shooting is not only dangerous but is sanctioned by immediate disqualification during competitions. Spectators must, under no circumstances, be allowed to stand between the archer and the target even if they are outside the shooting angle. R etrieving arrows from the target The basic rule is to wait for the last archer to shoot his or her last arrow before advancing to collect one’s own arrows from the target. However, if the order “fast” is given, all archers must immediately stop shooting. The signal that indicates that all is clear to cross the shooting line is when a designated person shouts the order: “Arrows” (or a word such as “score” or “pull”). A rm ing a bow Never arm a bow or even place (nock) the arrow onto the bowstring if the bow is not pointed at the target. All archers must be aware that an arrow can be loosed accidentally before it is correctly aimed. -
How to Make Your Own Archery Equipment
HOW TO MAKE YOUR OWN ARCHERY EQUIPMENT 2017 TABLE OF CONTENTS Introduction 3 BOW & STRING How to make bow handle (riser) 4 make bow limbs 6 make string 9 tie a nocking point by Heather Flint 15 wax a bowstring by Heather Flint 16 make bow stringer 17 make sight 18 make arrow rest 19 make pressure button 22 make draw length checker (clicker) 23 build a youth PVC bow by William Sephton 24 ARROWS How to make arrow shafts 40 fletch an arrow (with plastic vanes) by Heather Flint 43 how to apply arrow wraps by Heather Flint 45 make fletchings 46 make arrows by Ludys Tejada 48 make arrow container 49 put points in arrows by Heather Flint 50 ACCESSORIES How to make finger protector (tab) 51 make tab by Ludys Tejada 52 make arm guard (bracer) 53 make arm guard by Ludys Tejada 54 templates for tab and armguard 55 make finger sling 56 make quiver 59 make quiver by Ludys Tejada 60 make ground quiver 61 make jigs by William Sephton 62 TARGET How to make target 63 make target stand 65 bow stand 67 OTHER RECOMMENDED PUBLICATIONS AND WEBSITES Other recommended publications and websites 68 INTRODUCTION Archery is an extremely accessible sport kinds of bows, recurve, compound and in countries around the world. It is a sport traditional, and disciplines within the for all ages and abilities - and can be as sport – with a local archery club or centre. recreational or competitive as the person Facilities can range from a dedicated taking part wants! venue to hired sports halls or fields. -