The hydrodynamic and mechanical aspects of contra-rotating propulsion systems were extensively discussed at the joint meeting of the New York Metropolitan Section of The Society of Naval Architects and Marine Engineers and the Society of Marine Port Engineers New York, N.Y., Inc., held in December.
The meeting was in the form of a symposium with Capt. L. S. McCready, USMS, head, Department of Engineering, U.S. Merchant Marine Academy, serving as moderator. Six papers on the subject were prepared for the symposium, with the authors presenting abstracts and joining in on the discussion.
The papers were: Propulsion Machinery Considerations for Contra-Rotating Propeller Systems by T. W. Steele, manager-gear engineering, Marine Turbine & Gear Department, General Electric Company; Design Concepts for a Contra-Rotating Propulsion System by Sterling A. Fielding, marine engineer, Maritime Administration; Swedish Development of Contra-Rotating Propeller Systems for Turbine and Diesel Engine Drives by Dr. Ingvar Jung, Royal Technical University of Stockholm and director of Stal-Laval Turbine AB, and Per-Erik Larsson, chief gear designer, Stal-Laval Turbine AB; Contra-Rotating Propeller Propulsion - A State-of-the-Art Report by J. B. Hadler, head, Ship Powering Division, Naval Ship Research and Development Center; Main Reduction Gears for Contra-Rotation by W. I. H. Budd, manager of marine engineering, De Laval Turbine Inc., and Stern Gear and Line Shaft Systems for Driving Contra-Rotating Propellers by Dr. Norman V. Laskey, president, Camat Transportation Consultants, and J. M. Gruber, vice-president, Waukesha Industries.