Produced by Chris Curnow, Joseph Cooper, Stephanie Eason, and the Online Distributed Proofreading Team at https://www.pgdp.net. SMITHSONIAN ANNALS OF FLIGHT VOLUME 1 NUMBER 2 The First Airplane Diesel Engine: Packard Model DR-980 of 1928 _Robert B. Meyer_ SMITHSONIAN INSTITUTION NATIONAL AIR MUSEUM . WASHINGTON, D.C. [Illustration: Frontispiece--President Herbert Hoover (in front of microphones) presenting the Collier Trophy to Alvan Macauley (nearest engine), President of the Packard Motor Car Co., on March 31, 1932 (although the award was for 1931). Also present were Hiram Bingham, U.S. Senator from Connecticut (nearest pillar), Clarence M. Young, Director of Aeronautics, U.S. Department of Commerce (between Macauley and Hoover), and Amelia Earhart, first woman to fly across the Atlantic Ocean (between Macauley and the engine). In the foreground is a cutaway Packard diesel aeronautical engine and directly in front of Senator Bingham is the Collier Trophy, America's highest aviation award. (Smithsonian photo A48825.)] SMITHSONIAN ANNALS OF FLIGHT VOLUME 1 . NUMBER 2 The First Airplane Diesel Engine: Packard Model DR-980 of 1928 ROBERT B. MEYER _Curator of Flight Propulsion_ SMITHSONIAN INSTITUTION . NATIONAL AIR MUSEUM WASHINGTON, D.C. . 1964 The following microfilm prints are available at the Smithsonian Institution: "The Packard Diesel Aircraft Engine--A New Chapter in Transportation Progress." An advertising brochure produced by the Packard Motor Car Company in 1930, illustrated, 17 pages. Fifty-Hour Test of the Engine by the Packard Company, 1930. Text and charts, 14 pages. Fifty-Hour Test of the Engine by the U.S. Navy in 1931: Text and charts, 26 pages. Packard Instructional Manual, 1931. Illustrated, 74 pages. "The Packard Diesel Engine," Aviation Institute of U.S.A. Pamphlet No. 21-A, 1930. Illustrated, 32 pages. For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C., 20402--Price 60 cents Contents _Page_ ACKNOWLEDGMENTS vi FOREWORD vii INTRODUCTION 1 History 2 DESCRIPTION 11 Specifications 11 Operating Cycles 13 Weight-Saving Features 15 Diesel Cycle Features 20 Development 23 COMMENTS 27