Detailed Text
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Swing of a Cricket Ball
SCIENCE BEHIND REVERSE SWING C.P.VINOD CSIR-National Chemical Laboratory Pune BACKGROUND INFORMATION • Swing bowling is a skill in cricket that bowlers use to get a batsmen out. • It involves bowling a ball in such a way that it curves or ‘swings’ in the air. • The process that causes this ball to swing can be explained through aerodynamics. Dynamics is the study of the cause of the motion and changes in motion Aerodynamics is a branch of Dynamics which studies the motion of air particularly when it interacts with a moving object There are basically four factors that govern swing of the cricket ball: Seam Asymmetry in ball due to uneven tear Speed Bowling Action Seam of cricket ball Asymmetry in ball due to uneven tear Cricket ball is made from a core of cork, which is layered with tightly wound string, and covered by a leather case with a slightly raised sewn seam Dimensions- Weight: 155.9 and 163.0 g 224 and 229 mm in circumference Speed Fast bowler between 130 to 160 KPH THE BOUNDARY LAYER • When a sphere travels through air, the air will be forced to negotiate a path around the ball • The Boundary Layer is defined as the small layer of air that is in contact with the surface of a projectile as it moves through the air • Initially the air that hits the front of the ball will stick to the ball and accelerate in order to obtain the balls velocity. • In doing so it applies pressure (Force) in the opposite direction to the balls velocity by NIII Law, this is known as a Drag Force. -
Race and Cricket: the West Indies and England At
RACE AND CRICKET: THE WEST INDIES AND ENGLAND AT LORD’S, 1963 by HAROLD RICHARD HERBERT HARRIS Presented to the Faculty of the Graduate School of The University of Texas at Arlington in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY THE UNIVERSITY OF TEXAS AT ARLINGTON August 2011 Copyright © by Harold Harris 2011 All Rights Reserved To Romelee, Chamie and Audie ACKNOWLEDGEMENTS My journey began in Antigua, West Indies where I played cricket as a boy on the small acreage owned by my family. I played the game in Elementary and Secondary School, and represented The Leeward Islands’ Teachers’ Training College on its cricket team in contests against various clubs from 1964 to 1966. My playing days ended after I moved away from St Catharines, Ontario, Canada, where I represented Ridley Cricket Club against teams as distant as 100 miles away. The faculty at the University of Texas at Arlington has been a source of inspiration to me during my tenure there. Alusine Jalloh, my Dissertation Committee Chairman, challenged me to look beyond my pre-set Master’s Degree horizon during our initial conversation in 2000. He has been inspirational, conscientious and instructive; qualities that helped set a pattern for my own discipline. I am particularly indebted to him for his unwavering support which was indispensable to the inclusion of a chapter, which I authored, in The United States and West Africa: Interactions and Relations , which was published in 2008; and I am very grateful to Stephen Reinhardt for suggesting the sport of cricket as an area of study for my dissertation. -
WO 2017/163253 Al 28 September 2017 (28.09.2017) P O P C T
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization I International Bureau (10) International Publication Number (43) International Publication Date WO 2017/163253 Al 28 September 2017 (28.09.2017) P O P C T (51) International Patent Classification: KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, A63B 37/14 (2006.01) MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (21) International Application Number: SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, PCT/IN20 16/000069 TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (22) International Filing Date: (84) Designated States (unless otherwise indicated, for every 23 March 2016 (23.03.2016) kind of regional protection available): ARIPO (BW, GH, (25) Filing Language: English GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, (26) Publication Language: English TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, (72) Inventor; and DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, (71) Applicant : SHARMA, CHANDAN [IN/IN]; F-l, 1st LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, Floor, Plot - 19, Gyan Khand- I, Indirapuram, Ghaziabad, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, 201014, U.P. (IN). GW, KM, ML, MR, NE, SN, TD, TG). (72) Inventors: SHARMA, PRAVEEN; G-40, ISt Floor, G- Declarations under Rule 4.17 : block, Preet Vihar, New Delhi- 110092, Delhi (IN). -
Cricket: the Science of Swing
The Science of swing Sources: http://www.soest.hawaii.edu/GG/STUDENTS/jfoster/swing.html [dead link] Normal swing The leading part of the ball is covered by a lm of fast moving air, called the boundary layer. About halfway round the ball, the boundary layer separates from the surface. On the non-seam side the boundary layer peels away before the halfway mark. But on the seam side the ow is disrupted by the protuberence of the seam, the boundary layer is tripped into a chaotic turbulence and peels away after the halfway mark. The eect is to make the air pressure on the seam side of the ball lower and this pushes the ball towards the seam side, away from the batsman. The gure shows the standard outswinger; for the inswinging delivery the ball is re- versed, with the seam pointing to the leg-side. This delivery requires a dierent action to the outswinger, allowing the (good) batsman to recognise the deliveries as they are delivered. Contrary to intuition and popular belief, the swing is not primarily due to the dierence in friction caused by the rough and smooth sides of the ball - although it is this dierence that helps generate turbulent ow on one side and laminar ow on the other. For a blunt object like a sphere the main contributor to aerodynamic drag is the point of separation of the boundary layer, and turbulent ow holds the layer on to the surface longer, reducing the pressure on that side of the ball. (This is the same principal that allows a dimpled golf ball to y further than a smooth one. -
Pizza, Pints & Peri Peri
Pizza, pints & peri peri FIRST INNINGS Jalapeno sweetcorn fritters, tomato salsa (GF/VG) £5.5 Garlic pizza bread (GFO/VG) £5 Salt & pepper squid, lemon aioli £6.5 Cheesy garlic pizza bread (GFO/V/VGO) £5.5 Rose Harissa halloumi, grilled aubergine (V) £6 The Cricketers peri peri chicken wings (GFO) £6.5 On the GRILL… Miguel’s Peri Peri Chicken Chef Miguel’s family recipe passed down from his Portuguese grandmother. Lightly spiced & packed with flavour… ½ Peri peri chicken & skin on fries (GFO) £13 Peri peri halloumi & cous cous salad, mango Peri peri chicken & cous cous salad, mango & lime dressing £11 & lime dressing (V) £10.5 Peri peri chicken fillet burger, lettuce, perinaise Grilled halloumi burger, roasted red pepper, flat mushroom, perinaise, lettuce, skin on fries (GFO/V) £11 & skin on fries (GFO) £11.5 Miguel’s peri peri FEAST… ¼ Chicken & 4 wings marinated in chef Migs famous peri peri sauce, beef hanger steak, onion rings, served with perinaise fries, tomato & red onion salad £18.5 CRICKETERS CLASSICS The Cricketers BBQ glazed pork belly ribs, skin on fries, house salad (GFO) £14.5 Chargrilled beef burger, chipotle mayo, Monteray Jack cheese, gherkin, lettuce, skin on fries (GFO) £12 (+streaky bacon £1) Crispy tofu, tenderstem broccoli, chilli & lemon, radish, sesame seeds & Yutaka soba noodles (VG) £12 Beer battered haddock fillet, hand cut chips, peas & tartare sauce (GFO) £12.5 King prawn & Cromer crab linguine, chilli, cherry tomatoes, rocket & shaved parmesan £13.5 28 day aged Woodview farm beef hanger steak, onion rings, fries & green peppercorn sauce (GFO) £14.5 VG - Vegan VGO – Vegan option available V - Vegetarian GF - Gluten Free GFO – Gluten Free option available. -
The Nightwatchman Is a Quarterly Collection of Essays and Long-Form Articles and Is Available in Print and E-Book Formats
SAMPLE EDITION SPRING9 2015 THE NightwatchmanTHE WISDEN CRICKET QUARTERLY SAMPLER THE NightwatchmanTHE WISDEN CRICKET QUARTERLY Cricket’s past has been enriched by great writing and Wisden is making sure its future will be too. The Nightwatchman is a quarterly collection of essays and long-form articles and is available in print and e-book formats. Co-edited by Anjali Doshi and Tanya Aldred, with Matt Thacker as managing editor, The Nightwatchman features an array of authors from around the world, writing beautifully and at length about the game and its myriad offshoots. Contributors are given free rein over subject matter and length, escaping the pressures of next-day deadlines and the despair of cramming heart and soul into a few paragraphs. There are several different ways to get hold of and enjoy The Nightwatchman. You can subscribe to the print version and get a free digital copy for when you’re travelling light. If you don’t have enough room on your book case, you can always take out a digital-only subscription. Or if you’d just like to buy a single issue – in print, digital or both – you can do that too. Take a look at the options below and decide which is best for you. Full subscription Annual print Digital subscription subscription (with Annual e-book only free e-book versions) subscription £27 (+P&P) £10 Click to Buy Click to Buy Single copy Single issue (with Digital single copy free with free Single issue e-book version) (e-book only) £9 (+P&P) £4 Click to Buy Click to Buy THENIGHTWATCHMAN.NET THE NIGHTWATCHMAN Issue 9, out -
SOCCERNOMICS NEW YORK TIMES Bestseller International Bestseller
4color process, CMYK matte lamination + spot gloss (p.2) + emboss (p.3) SPORTS/SOCCER SOCCERNOMICS NEW YORK TIMES BESTSELLER INTERNATIONAL BESTSELLER “As an avid fan of the game and a fi rm believer in the power that such objective namEd onE oF thE “bEst booKs oF thE yEar” BY GUARDIAN, SLATE, analysis can bring to sports, I was captivated by this book. Soccernomics is an FINANCIAL TIMES, INDEPENDENT (UK), AND BLOOMBERG NEWS absolute must-read.” —BillY BEANE, General Manager of the Oakland A’s SOCCERNOMICS pioneers a new way of looking at soccer through meticulous, empirical analysis and incisive, witty commentary. The San Francisco Chronicle describes it as “the most intelligent book ever written about soccer.” This World Cup edition features new material, including a provocative examination of how soccer SOCCERNOMICS clubs might actually start making profi ts, why that’s undesirable, and how soccer’s never had it so good. WHY ENGLAND LOSES, WHY SPAIN, GERMANY, “read this book.” —New York Times AND BRAZIL WIN, AND WHY THE US, JAPAN, aUstralia– AND EVEN IRAQ–ARE DESTINED “gripping and essential.” —Slate “ Quite magnificent. A sort of Freakonomics TO BECOME THE kings of the world’s for soccer.” —JONATHAN WILSON, Guardian MOST POPULAR SPORT STEFAN SZYMANSKI STEFAN SIMON KUPER SIMON kupER is one of the world’s leading writers on soccer. The winner of the William Hill Prize for sports book of the year in Britain, Kuper writes a weekly column for the Financial Times. He lives in Paris, France. StEfaN SzyMaNSkI is the Stephen J. Galetti Collegiate Professor of Sport Management at the University of Michigan’s School of Kinesiology. -
Science of Swing
The science of swing James Anderson’s ability to so it acts as a rudder. Contrary to Weather report Pitch report Sultans of swing swing the ball could decide cricketing lore, however, the • Experiments show that, • Grassy wicket: can protect shiny side the fourth Test at weather will not be a factor: contrary to popular cricketing of ball, assisting conventional swing George Hirst belief, cloud cover and humidity • Abrasive wicket: can scuff up ball, • England, 24 Tests, 59 Headingley. His success will science suggests that none of the seem to have no effect on swing creating rougher rough side and depend on manipulating three types of swing are affected wickets at 30.00 • Prevailing winds can disrupt promoting reverse-swing aerodynamics and creating subtle by cloud cover or humidity, turbulence patterns on the ball, • Very hard wicket: can depress seam, pressure imbalances on either side although pitch conditions and promoting swing in particular making conventional or reverse swing Bob Massie of the ball, by positioning the seam wind can make a difference grounds or from a particular impossible. Contrast swing may still be • Australia, 6 Tests, 31 bowling end effective wickets at 20.87 Richard Hadlee • New Zealand, 86 Tests, 431 Normal Reverse Contrast wickets at 22.29 swing swing swing Waqar Younis • Pakistan, 87 Tests, 373 wickets at 23.56 Zaheer Khan • India, 65 Tests, 210 wickets at 33.84 1 The grip 1 The grip At low speed At high speed Bowler holds ball next to seam, with part of Bowler holds ball next to seam, with part of shiny side towards batsman, and points rough side towards batsman, and points seam in direction he wants the ball to swing. -
Swing Bowling in T20 James Pattinson
SWING BOWLING IN T20 WITH JAMES PATTINSON SWING BOWLING IN T20 WITH JAMES PATTINSON There are three different types of swing. New ball swing, old ball swing and reverse swing. The key factors effecting swing bowling are: • Condition of the ball (new or roughed up) • Wrist position (the position/direction of your wrist when you release the ball) • Seam position (the position of the seam once you release the ball) • Release point (where your arm is when you release the ball – higher or wider) • Arm pathway (where you follow through with your arm once you have released the ball) Let me explain each type of swing and how each of these factors play a part. Firstly….. New Ball Swing As the name suggests, new ball swing is when the ball is brand new and both sides are shiny. The way that the ball swings is by using the seam as a ‘rudder’. For my examples I’m going to be talking about a right arm bowler to right handed batsmen. If you are trying to bowl an outswinger (swinging away from the right hander) with the new ball the seam will be positioned towards first or second slip and your wrist angled in PATTINSON that direction as well. See the photo below…. www.australiancricketinstitute.comwww.clt20academy.com The release point for an outswinger is slightly wider, so your arm slightly away from your head and your arm pathway is across your body, down to your left leg….see the photo below…. www.australiancricketinstitute.comwww.clt20academy.com For the inswinger we do everything in reverse. -
The Science of Swing Bowling-1
The science of swing bowling Rabindra Mehta September 6, 2006 Conventional swing, reverse swing, contrast swing. In the past few years cricketers have been barraged with new and convoluted descriptions of a ball's deviation through the air, but only the select few can differentiate between each, let alone unravel the science behind them. One such man is Rabindra Mehta, a NASA scientist and former club fast bowler based in California, who has studied cricket-ball aerodynamics for nearly three decades. Here, in response to an article published at Cricinfo last week, he gives the definitive answer to the mysteries of swing. Does it really matter what you call a particular type of swing? Well, it matters because the science dictates what type of swing it is. Of course, bowlers do not have to know or understand the science, but I'm sure they would appreciate knowing when a certain type of swing will be effective and in which direction the ball is likely to swing. Having studied cricket ball aerodynamics for over 25 years, my mission here is to reveal the answers to all the mysteries surrounding swing bowling, and hopefully, to quash once and for all, all the myths and erroneous explanations that are still floating around the cricketing world. To assure you that these three types of swing do actually exist, and are regularly practised on the cricket ground, I have quoted examples from the famous 2005 Ashes series between England and Australia. Let us first look at some of the fundamental flow physics that will help to explain all three types of cricket ball swing. -
Cricket Book For
THE ROYAL MARINES Cricket 2 CONTENTS Student Notes Teacher Notes MESSAGE FROM THE NATIONAL CRICKET ASSOCIATION 3 INTRODUCTION TO THE MODULE 3 SKILLS DEVELOPMENT SHEET 4 Prepared for The Royal Navy in Association with The National Cricket Association and produced by Education & Youth Ltd, London. UNIT 1 INTRODUCTION TO CRICKET MODULE 5 If there is any support you feel The Royal Navy can give regarding this UNIT 2 TECHNIQUES AND SKILLS 6 project please contact 0870 333 0423. 1 FIELDING 6 2 BOWLING 9 Acknowledgements 3 BATTING 14 4 WICKET KEEPING 22 These notes have been compiled by Bob Carter – National Coach, (Coach Education) The National Cricket Association UNIT 3 TACTICS AND FIELD PLACEMENT 25 Technical Editor: P Edwards M.A. UNIT 4 UMPIRING 28 UNIT 5 PHYSICAL CONDITIONING FOR CRICKET 30 UNIT 6 HISTORY OF CRICKET 34 UNIT 7 THE COMPETITIVE STRUCTURE OF THE SPORT. 35 UNIT 8 USEFUL INFORMATION 36 3 Message from The National Cricket Association The National Cricket Association, founded in 1968 has several objectives, two of which are especially relevant with reference to this publication. They are as follows: - to encourage the playing of cricket in accordance with the Laws of Cricket and in the best traditions of Sportsmanship; - to administer a coaching scheme on a national basis on behalf of the Cricket Council. The National Coaching Scheme is highly regarded by all cricketing nations as being in the vanguard of educational and coaching methods at all levels. Additionally, two separate Proficiency Award tests are run and administered by the NCA for primary and secondary school children. -
Introduction
Design and Fabrication of Belt-Driven Cricket Bowling Machine CHAPTER 1 INTRODUCTION Introduction : Today cricket is one of the most popular games in India and abroad. In the game of cricket, batsman needs to be trained playing different varieties of bowling to make the batting technically perfect. The bowling machine will assist for said purpose. The machine is to provide accurate and consistent batting practice for players of all standards like professional cricketers, amateur cricketers and club level cricketers. Professional cricketers who can use it as part of their regular practice for fine tuning of batting as well as eliminate flaws in their batting without necessity of bowler. Also it will be of much use at school, club and junior level where the standards of bowling are less consistent. 1.1 Bowling machine In cricket a bowling machine is a device which enables a batsman to practice (usually in the nets) and to prune specific skills through repetition of the ball being bowled at a certain length, line and speed. It can also be used when there is no-one available to bowl, or no one of the desired style or standard. There are a number of different types of bowling machine available to cricket coaches, each quite different in the ways they achieve the required delivery, though most allow the use of remote control, so that a coach can be closer to a batsman when the stroke is played. Following are the main types of bowling machines available. Department Of Mechanical Engineering, SJEC Page 1 Design and Fabrication of Belt-Driven Cricket Bowling Machine 1.1.1 Mechanical bowling machines This type of machine is by far the most common.