Pratt & Whitney's Dependable Masterpiece Graham White This book is on what was arguably I the finest aircraft piston engine ever produced - the Pratt & Whitney R-2800. It was an engine that was put together with the invaluable help of those who were actually there at the drawing boards, in the test cells and at the test flights. An aircraft engine, however, does not stand alone. R-2800: Pratt & s Whitney Dependable Masterpiece provides a background of Pratt & Whitney, and delves into the design challenges faced by its engineers when building the R-2800; answering questions like, "How did the airframe designers mount the engine?"; or "How was the intercooler supplied with cooling air?" In addition, this comprehensive book covers propellers, carburetors, and the many famous and not so famous aircraft the R-2800 powered. From the Preface ... As the heyday of the R-2800 is rapidly becoming a fond memory, the younger generation needs to realize how commercial and military aviation gained prominence in this country thanks to the R-2800. Today's generation, raised on the pungent stink of kerosene and the high pitched whine of a gas turbine's compressor, can take solace in knowing that at one time the wonderful aroma of burned oil and high performance fuel used to waft through airports along with that wonderful, loping idle of the R-2800, or its ferocious roar at takeoff power. That they dripped oil, and always looked messy with exhaust stains and oil leaks only added to th~ir charisma. R-2800: Pratt & Whitney's Dependable Masterpiece examines the piston pow ered engine that helped lead a nation to victory in war, and the men and women whose hard work and dedication made it possible. Topics covered in this book include: • Why Radials? • Pratt & Whitney History and Background • R-2800 Development • Model Types & Specifications • Carburetors • Propellers • Installations • Military Applications • Commercial Applications • Helicopters • Operating, Service Difficulties and Overhaul • Racing • The Future About the Author. .. Graham White was born in 1945 and spent his formative years in England where he got his start in aviation by racing U control model airplanes. Since then, he has spent much of his time researching and learning about the various piston powered aircraft engines that he adores so much. In addition to owning and restoring an R-2800, Graham's collection also includes an ultra-rare Continental IV-1430 Hyper engine; a Packard built Rolls-Royce Merlin, and two Pratt & Whitney R-4360s. Graham is also author of the SAE Bestseller Allied Aircraft Piston Engines of World War II (R-154). R-2800 Pratt & Whitney's Dependable Masterpiece Other SAE books Allied Aircraft Piston Engines of World War II By Graham White (Order No. R-154) German Aircraft Industry and Production, 1933-1945 By Ferenc A. Vajda and Peter Dancey (Order No. R-236) The World's Most Significant and Magnificent Aircraft Evolution of the Modern Airplane By David B. Thurston (Order No. R-285) For more information or to order this book, contact SAE at 400 Commonwealth Drive, Warrendale, PA 15096-0001; (724)776-4970; fax (724)776-0790; e-mail: [email protected]; web site: www.sae.org/BOOKSTORE. R-2800 Pratt & Whitney's Dependable Masterpiece Graham White Library of Congress Cataloging-in-Publication Data White, Graham, 1945- R-2800 : Pratt & Whitney's dependable masterpiece I Graham White. p. cm. Includes bibliographical references and index. ISBN 0-7680-0272-9 1. Airplanes-Motors-Design and construction-History. 2. Air cooled engines Design and construction-History. 3. Pratt & Whitney Aircraft Group-History. I. Title. TL703.P7 W45 2001 629.134'35'0973-dc21 2001020429 Copyright © 2001 Society of Automotive Engineers, Inc. 400 Commonwealth Drive Warrendale, PA 15096-0001 U.S.A. Phone: (724)776-4841 Fax: (724)776-5760 E-mail: [email protected] http://www.sae.org ISBN 0-7680-0272-9 All rights reserved. Printed in Canada Permission to photocopy for internal or personal use, or the internal or personal use of specific clients, is granted by SAE for libraries and other users registered with the Copyright Clearance Center (CCC), provided that the base fee of $.50 per page is paid directly to CCC, 222 Rosewood Dr., Danvers, MA 01923. Special requests should be addressed to tl1e SAE Publications Group. 0-7680-0272-9/01-$.50. SAE Order No. R-241 Dedicated to my wonderful wife Diane who has always supported me in my various endeavors Contents Foreword ............................................................................................................................................ ix Preface .............................................................................................................................................. xi Acknowledgments ............................................................................................................................ xv Introduction ...................................................................................................................................... xix Chapter 1 Why Radials? ................................................................................................................... 1 Chapter 2 Pratt & Whitney History and Background ....................................................................... 9 Chapter 3 R-2800 Development ...................................................................................................... 21 Chapter 4 Variations ...................................................................................................................... 125 Chapter 5 Model Types & Specifications ..................................................................................... 225 Chapter 6 Carburetors ................................................................................................................... 299 Chapter 7 Propellers ...................................................................................................................... 317 Chapter 8 Installations ................................................................................................................... 365 Chapter 9 Military Applications ..................................................................................................... 375 Chapter 10 Commercial Applications ............................................................................................ 563 Chapter 11 Helicopters .................................................................................................................. 601 Chapter 12 Operating, Service Difficulties and Overhaul ............................................................. 617 Chapter 13 Racing ......................................................................................................................... 655 Chapter 14 The Future .................................................................................................................. 663 Color Section ................................................................................................................................... C 1 Index ............................................................................................................................................... 669 About the Author ............................................................................................................................ 717 vii