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Study on Thin Airfoil Theory and Performance Test of Elliptical Wing As Compared to Model Mosquito Wing and NACA 64A012 Mod Airfoil
EJERS, European Journal of Engineering Research and Science Vol. 3, No. 4, April 2018 Study on Thin Airfoil Theory and Performance Test of Elliptical Wing as Compared to Model Mosquito Wing and NACA 64A012 Mod Airfoil Nesar Ali, Mostafizur R. Komol, and Mohammad T. Saki their elevated flying characteristics, flying insects give Abstract—Thin airfoil theory is a simple conception of researchers inspiration for biomimetic fabrications of airfoils that describes angle of attack to lift for incompressible, insect’s wing and many model aircraft wing. We also inviscid flows. It was first devised by famous German- analyze the four basic principle forces acting on an aircraft American mathematician Max Munk and therewithal refined in flight and insect’s flying [1], [15]. by British aerodynamicist Hermann Glauertand others in the 1920s. The thin airfoil theory idealizes that the flow around an Flight is the astonishment that has long been a part of the airfoil as two-dimensional flow around a thin airfoil. It can be natural world. Birds fly and insect’s flying not only by conceived as addressing an airfoil of zero thickness and infinite flapping their wings, but by gliding with their wings wingspan. Thin airfoil theory was particularly citable in its day convoluted for long distances. Likewise, man-made aircraft because it provided a well-established theoretical basis for the bank on this philosophy to overcome the force of gravity following important prominence of airfoils in two-dimensional and achieve enough flight. Lighter-than-air craft, such as the flow like i) on a symmetric shape of airfoil which center of pressure and aerodynamic center remain exactly one quarter hot air balloon, dispense on the Buoyancy principle. -
Political Capture and Economic Inequality
178 OXFAM BRIEFING PAPER 20 JANUARY 2014 Housing for the wealthier middle classes rises above the insecure housing of a slum community in Lucknow, India. Photo: Tom Pietrasik/Oxfam WORKING FOR THE FEW Political capture and economic inequality Economic inequality is rapidly increasing in the majority of countries. The wealth of the world is divided in two: almost half going to the richest one percent; the other half to the remaining 99 percent. The World Economic Forum has identified this as a major risk to human progress. Extreme economic inequality and political capture are too often interdependent. Left unchecked, political institutions become undermined and governments overwhelmingly serve the interests of economic elites to the detriment of ordinary people. Extreme inequality is not inevitable, and it can and must be reversed quickly. www.oxfam.org SUMMARY In November 2013, the World Economic Forum released its ‘Outlook on the Global Agenda 2014’, in which it ranked widening income disparities as the second greatest worldwide risk in the coming 12 to 18 months. Based on those surveyed, inequality is ‘impacting social stability within countries and threatening security on a global scale.’ Oxfam shares its analysis, and wants to see the 2014 World Economic Forum make the commitments needed to counter the growing tide of inequality. Some economic inequality is essential to drive growth and progress, rewarding those with talent, hard earned skills, and the ambition to innovate and take entrepreneurial risks. However, the extreme levels of wealth concentration occurring today threaten to exclude hundreds of millions of people from realizing the benefits of their talents and hard work. -
Political Stability and the Division of Czechoslovakia
Western Michigan University ScholarWorks at WMU Master's Theses Graduate College 8-1996 Political Stability and the Division of Czechoslovakia Timothy M. Kuehnlein Follow this and additional works at: https://scholarworks.wmich.edu/masters_theses Part of the Political Science Commons Recommended Citation Kuehnlein, Timothy M., "Political Stability and the Division of Czechoslovakia" (1996). Master's Theses. 3826. https://scholarworks.wmich.edu/masters_theses/3826 This Masters Thesis-Open Access is brought to you for free and open access by the Graduate College at ScholarWorks at WMU. It has been accepted for inclusion in Master's Theses by an authorized administrator of ScholarWorks at WMU. For more information, please contact [email protected]. POLITICAL STABILITY AND THE DIVISION OF CZECHOSLOVAKIA by Timothy M. Kuehnlein, Jr. A Thesis Submitted to the Faculty of The Graduate College in partial fulfillment of the requirements for the Degree of Master of Arts Department of Political Science Western Michigan University Kalamazoo, Michigan August 1996 ACKNOWLEDGMENTS The completion of this project was both a tedious and rewarding experience. With the highest expectations for the style and content of the presentation, I have attempted to be as concise yet thorough as possible in the presentation and defense of the argument. The composition of this thesis entails nearly two years of diligent work outside of general course studies. It includes preliminary readings in Central and East European affairs, an extensive excursion throughout the Czech and Slovak republics with readings in the theory of political stability, the history and politics of Czecho slovakia, in addition to composing the text. My pursuit was driven by a passion for the topic, a quest for know ledge and understanding, and the argument's potential for continued development. -
Sample Spreads
Contents Foreword by Geoffrey Wellum 9 Introduction 11 1 A Star is Born 19 Little Annie 19 The Spitfire Fund 22 First Flight 27 2 Making an Icon 33 A Spitfire Made from Half a Crown 33 Dead Sea 36 Making Spitfires in Castle Bromwich 38 Miss Shilling’s Orifice 46 3 In the Air 49 A Premonition 49 Survival in the Balkans 55 A WAAF’s Terrifying Experience 58 An Unexpected Reunion 60 Eager for the Air 67 Movie Stars 80 Respect for the Enemy 84 Sandals with Wings 90 A Black Attaché Case 94 The Polish Pilots 96 The Lucky Kiwi 100 Tip ’em Up Terry 104 Parachute Poker 118 4 On the Ground 122 How to Clean a Spitfire 122 Ken’s Last Wish 123 Kittie’s Long Weight 127 The Squadron Dog 133 Life with the Clickety Click Squadron 134 Doping the Walrus 146 A Poem for Ground Crew 150 The Armourer’s Story 153 Who Stole My Trousers? 166 5 Spitfire Families 172 The Dundas Brothers 172 The Gough Girls 175 The Agazarian Family 179 The Grace Family 184 6 Love and Loss 189 The Girl on the Platform 189 Wanted: One Handsome Pilot 200 Jack and Peggy 202 Pat and Kay 205 7 Afterwards 211 The Oakey Legend 211 Sergeant Robinson’s Dream 216 The Secret Party 222 Bittersweet Memories 232 Key Figures 237 Further Reading 244 Acknowledgements 245 Picture Credits 246 Index 248 Introduction he image is iconic and the history one of wartime Tvictory against the odds. Yet in many ways, the advent of the Supermarine Spitfire was a minor miracle in itself. -
Battling for the Skies: Key Facts
vv Battling for the Skies: Key Facts The Beginning Many battles took place during the six years of the Second World War. However, one of the most significant and momentous of these was the Battle of Britain. This was a battle fought above the skies of England whereby the Royal Air Force (RAF) heroically and skilfully held off the German air force (the Luftwaffe) who were attempting to defeat and then invade Great Britain. After conquering most of Europe, Hitler (Germany’s Chancellor and military leader) turned his attentions to attacking Great Britain. His plan, which was given the code name Operation Sea Lion, was to bombard the UK from the skies and then raid it from the sea. However, he greatly underestimated the bravery and the power of the British pilots, planes and people. In July 1940, when German planes began bombing British airfields, harbours, factories and radar stations, the Luftwaffe had 2000 more planes than the RAF. However, by the end of the battle, 1800 of these were shot down by allied aircraft compared to the British loss of around 1000. The bombing went on for many months. As the battle continued, Hitler grew increasingly frustrated by the lack of progress that the Luftwaffe were making and so in September, he commanded them to begin bombing British towns and cities instead. Although many cities across Britain were attacked, London was the most heavily afflicted in a period of history famously known as The Blitz. During this time, thousands of Londoners lost their homes and lives due to nightly German bombing assaults. -
The Unsung Heroes: the Ground Crew of No. 1 (RCAF) Squadron 89 the ROYAL CANADIAN AIR FORCE JOURNAL VOL
THE ROYAL CANADIAN AIR FORCE JOURNAL VOL. 4 | NO. 2 SPRING 2015 The Heroes:Unsung The Ground Crew of No. 1 (RCAF) Squadron DND By Major Mathias Joost, CD The Hurricanes had scrambled 30 minutes ago. They sat there waiting, some closing their eyes in an effort to catch some sleep, others talking casually—all trying to fill the time until the aircraft returned. Occasionally a contrail could be seen in the sky, but no sounds from the mad fighting in the air reached their ears. The wait and the uncertainty simply added to the tension of whether their airplane, their pilot would return safely having scored a victory over the Luftwaffe.1 f there were unsung heroes during the Battle of Britain, they were the ground crew and support staff who allowed the fighter pilots to do their job of closing with the enemy and shooting him I down. For the airmen of the Royal Canadian Air Force (RCAF) serving with No. 1 (RCAF) Squadron, this was no different than for their comrades in the Royal Air Force (RAF).2 None had any experience in combat operations, and yet, they were now thrown into the maelstrom of war, expected to keep the aircraft operational at any cost. The senior ranks were expected to provide guidance and leadership under conditions that they themselves had not experienced before. While the airmen of the squadron, and each of the respective trades, helped to make No. 1 (RCAF) Squadron a success during the Battle of Britain, this article will focus upon the ground crew of the two flights who kept the aircraft ready to scramble at a moment’s notice. -
Part 2. Anatomy of the Wing and Its Performance
Part 2. Anatomy of the wing and its performance 1 A reminder on the notation and how forces are computed 2 A reminder on the notation and how forces are computed • Forces and moments acting on an airfoil (2D). where is the airfoil lift coefficient, the airfoil chord, is the free-stream velocity and is the air density where is the airfoil drag coefficient, the airfoil chord, is the free-stream velocity and is the air density where is the airfoil pitching moment coefficient (usually computed at ), the airfoil chord, is the reference arm, is the free-stream velocity and is the air density • Notice that the forces and moments are computed per unit depth. 3 A reminder on the notation and how forces are computed • Forces and moments acting on a wing (3D). where is the wing lift coefficient, is the wing reference area , is the free-stream velocity and is the air density. where is the wing drag coefficient, is the wing reference area , is the free-stream velocity and is the air density. where is the wing pitching moment coefficient (usually computed at of the MAC), is the reference arm, is the wing reference area, is the free-stream velocity and is the air density. 4 A reminder on the notation and how forces are computed • The previous equations are used to get the forces and moments if you know the coefficients. • Remember, the coefficients contain all the information related to angle of attack, wing/airfoil geometry, and compressibility effect. • If you are doing CFD, you can directly compute the forces and moments by integrating the pressure and viscous forces over the body surface. -
File:Thinking Obliquely.Pdf
NASA AERONAUTICS BOOK SERIES A I 3 A 1 A 0 2 H D IS R T A O W RY T A Bruce I. Larrimer MANUSCRIP . Bruce I. Larrimer Library of Congress Cataloging-in-Publication Data Larrimer, Bruce I. Thinking obliquely : Robert T. Jones, the Oblique Wing, NASA's AD-1 Demonstrator, and its legacy / Bruce I. Larrimer. pages cm Includes bibliographical references. 1. Oblique wing airplanes--Research--United States--History--20th century. 2. Research aircraft--United States--History--20th century. 3. United States. National Aeronautics and Space Administration-- History--20th century. 4. Jones, Robert T. (Robert Thomas), 1910- 1999. I. Title. TL673.O23L37 2013 629.134'32--dc23 2013004084 Copyright © 2013 by the National Aeronautics and Space Administration. The opinions expressed in this volume are those of the authors and do not necessarily reflect the official positions of the United States Government or of the National Aeronautics and Space Administration. This publication is available as a free download at http://www.nasa.gov/ebooks. Introduction v Chapter 1: American Genius: R.T. Jones’s Path to the Oblique Wing .......... ....1 Chapter 2: Evolving the Oblique Wing ............................................................ 41 Chapter 3: Design and Fabrication of the AD-1 Research Aircraft ................75 Chapter 4: Flight Testing and Evaluation of the AD-1 ................................... 101 Chapter 5: Beyond the AD-1: The F-8 Oblique Wing Research Aircraft ....... 143 Chapter 6: Subsequent Oblique-Wing Plans and Proposals ....................... 183 Appendices Appendix 1: Physical Characteristics of the Ames-Dryden AD-1 OWRA 215 Appendix 2: Detailed Description of the Ames-Dryden AD-1 OWRA 217 Appendix 3: Flight Log Summary for the Ames-Dryden AD-1 OWRA 221 Acknowledgments 230 Selected Bibliography 231 About the Author 247 Index 249 iii This time-lapse photograph shows three of the various sweep positions that the AD-1's unique oblique wing could assume. -
Hawker Tempest
Hawker Tempest Hawker Tempest Hawker Tempest II, RAF Museum, Hendon Type Fighter/Bomber Manufacturer Hawker Aircraft Limited Maiden flight 2nd September 1942 Introduced 1944 Status Retired Primary users Royal Air Force Royal New Zealand Air Force Number built 1,702 The Hawker Tempest was a Royal Air Force (RAF) fighter aircraft of World War II, an improved derivative of the Hawker Typhoon, and one of the most powerful fighters used in the war. Development While Hawker and the RAF were struggling to turn the Typhoon into a useful aircraft, Hawker's Sidney Camm and his team were rethinking the design at that time in the form of the Hawker P. 1012 (or Typhoon II). The Typhoon's thick, rugged wing was partly to blame for some of the aircraft's performance problems, and as far back as March 1940 a few engineers had been set aside to investigate the new laminar flow wing that the Americans had used in the P-51 Mustang. The laminar flow wing had a maximum chord, or ratio of thickness to length of the wing cross section, of 14.5 %, in comparison to 18 % for the Typhoon. The maximum thickness was further back towards the middle of the chord. The new wing was originally longer than that of the Typhoon at 43 ft (13.1 m), but the wingtips were clipped and the wing became shorter than that of the Typhoon at 41 ft (12.5 m). The new wing cramped the fit of the four Hispano 20 mm cannon that were being designed into the Typhoon. -
A Young Man, His Hurricane and the Battle of Britain
Tally-Ho! A young man, his Hurricane and the Battle of Britain BY RAF WING CMDR. ROBERT W. “BOB” FOSTER (RET.) AS TOLD TO AND WRITTEN BY JAMES P. BUSHA If Hollywood had its way with history, the Supermarine Spitfire with its long slender fuselage and graceful elliptical wing, would most likely be portrayed as the lone defender over the White Cliffs of Dover during the Battle of Britain. Although the Spitfire played an important role in beating back the daily Luftwaffe raids, it was the tenacity of the pug-nosed Hawker Hurricanes of the RAF that bore the brunt of aerial combat during England’s darkest days. The Hurricane was slower than the Spit and it took longer to climb to altitude, but once it got there, the stubby little fighter jumped in and out of scrapes like a backstreet brawler. Although the RAF Hurricane had its nose bloodied many times over by the German raiders, it was able to Owner Peter Vacher painstakingly restored this Hawker Hurricane stay upright as it absorbed many punishing blows. British estimates credit the Hurricane with four-fifths of all Mk I, serial number R4118, which Bob Foster flew in combat during German aircraft destroyed during the peak of the battle—July through October of 1940. Follow along with one the massive air battles with the Luftwaffe over Southern England in 1940. Carl Schofield is the privileged pilot behind the stick. (Photo of these Hurricane pilots as he slugs it out with the mighty Luftwaffe high over England. by John Dibbs/planepicture.com) 34 flightjournal.com JUNE 2012 35 TALLY-HO! Learning the ropes I joined the RAF in 1939 because I thought it would be more glamorous to be shot down in a fighter than to be shot or bayoneted as a foot sol- dier in a trench! By November of 1939, I had al- ready accumulated over 50 hours of flight time in a trainer called the Avro Cadet and progressed on to the Hawker Hart, Audax and Harvards. -
Amphibious Aircrafts
Amphibious Aircrafts ...a short overview i Title: Amphibious Aircrafts Subtitle: ...a short overview Created on: 2010-06-11 09:48 (CET) Produced by: PediaPress GmbH, Boppstrasse 64, Mainz, Germany, http://pediapress.com/ The content within this book was generated collaboratively by volunteers. Please be advised that nothing found here has necessarily been reviewed by people with the expertise required to provide you with complete, accurate or reliable information. Some information in this book may be misleading or simply wrong. PediaPress does not guarantee the validity of the information found here. If you need specific advice (for example, medical, legal, financial, or risk management) please seek a professional who is licensed or knowledge- able in that area. Sources, licenses and contributors of the articles and images are listed in the section entitled ”References”. Parts of the books may be licensed under the GNU Free Documentation License. A copy of this license is included in the section entitled ”GNU Free Documentation License” All third-party trademarks used belong to their respective owners. collection id: pdf writer version: 0.9.3 mwlib version: 0.12.13 ii Contents Articles 1 Introduction 1 Amphibious aircraft . 1 Technical Aspects 5 Propeller.............................. 5 Turboprop ............................. 24 Wing configuration . 30 Lift-to-drag ratio . 44 Thrust . 47 Aircrafts 53 J2F Duck . 53 ShinMaywa US-1A . 59 LakeAircraft............................ 62 PBYCatalina............................ 65 KawanishiH6K .......................... 83 Appendix 87 References ............................. 87 Article Sources and Contributors . 91 Image Sources, Licenses and Contributors . 92 iii Article Licenses 97 Index 103 iv Introduction Amphibious aircraft Amphibious aircraft Canadair CL-415 operating on ”Fire watch” out of Red Lake, Ontario, c. -
AUGUST 2017 19Th Master’S Annual Garden Party Charlton Park
AirPilot AUG 2017 ISSUE 22 Diary AUGUST 2017 19th Master’s Annual Garden Party Charlton Park AI R PILOT SEPTEMBER 2017 THE HONOURABLE 13th Instructors’ Working Group Cobham House COMPANY OF 14th GP&F Committee Cobham House Court Cutlers’ Hall AIR PILOTS 19th ACEC Cobham House incorporating 20th AST/APT Cobham House Air Navigators 21st New Members’ Briefing Cobham House 27th Luncheon Club (Liveryman Andrew Brookes) RAF Club PATRON : Tymms Lecture RAeS His Royal Highness 29th Election of Lord Mayor Guildhall The Prince Philip Duke of Edinburgh KG KT OCTOBER 2017 GRAND MASTER : 11th Pilot Aptitude Testing RAF Cranwell His Royal Highness 26th Trophies and Awards Banquet Guildhall The Prince Andrew Duke of York KG GCVO MASTER : Captain C J Spurrier CLERK : Paul J Tacon BA FCIS Incorporated by Royal Charter. A Livery Company of the City of London. PUBLISHED BY : The Honourable Company of Air Pilots, Cobham House, 9 Warwick Court, Gray’s Inn, London WC1R 5DJ. VISITS PROGRAMME EDITOR : Please see the flyers accompanying this issue of Air Pilot or contact Liveryman David Paul Smiddy BA (Econ), FCA Curgenven at [email protected]. EMAIL: [email protected] These flyers can also be downloaded from the Company's website. Please check on the Company website for visits that are to be confirmed. FUNCTION PHOTOGRAPHY : Gerald Sharp Photography View images and order prints on-line. TELEPHONE: 020 8599 5070 EMAIL: [email protected] GOLF CLUB EVENTS WEBSITE: www.sharpphoto.co.uk Please check on Company website for latest information PRINTED BY: Printed Solutions Ltd 01494 478870 Except where specifically stated, none of the material in this issue is to be taken as expressing the opinion of the Court of the Company.