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Title: River tow behavior in waterways. Report 2, Second Exxon Test Program
Authors: R. M. Schulz Associates.
Schulz, Roger M.
Keywords: Exxon test program
Tows and towing
Inland navigation
Mississippi River
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-78-17 rept. 2.
Description: Technical Report
Abstract: This is the final report by R. M. Schulz Associates (RHSA) to the Corps of Engineers (COE) on Contract No. DACW39-77-C-0086 to obtain and analyze data on river tow behavior. This report describes the second full-scale river tow test program conducted in this country in which second-by-second records of tow position, attitude, rudder, power, and river environment parameters are obtained and analyzed. This study is an expanded version of the study format established during the first Exxon Co., USA (EXXON), test program. In the latter part of November 1976, the first Exxon tow test program was conducted using an Exxon Co. owned and operated river tow. The tow was instrumented and a number of trial runs were made to determine the tow's speed-power, fuel consumption, and maneuvering performance. The tests took place in the Baton Rouge area on the Lower Mississippi River. The towboat employed in the test program, the EXXON MEMPHIS, was a twin screw, Kort nozzle towboat designed to push an integrated oil tow. The current series of tests performed in November 1977 using the EXXON NASHVILLE and EXXON LAKE CHARLES, open-wheel towboats, completed the comparative program to determine the propulsion efficiency of Kort nozzle and open-wheel propulsion systems. The EXXON MEMPHIS and EXXON NASHVILLE were identical designs with the exception of the Kort nozzle, while the EXXON LAKE CHARLES had about two-thirds of their installed power. The initial Exxon test program, designed primarily to analyze Kort nozzle performance, was expanded to include participation by RMSA under COE sponsorship. RMSA's role was to measure and analyze tow position and steering behavior in addition to available horsepower data. The expanded test program provided Exxon and the COE with a cost-effective method of obtaining data on such dynamic performance elements as: steering response in turns; speed losses due to steering; acceleration and stopping distances; and Kort nozzle and open-wheel impacts on steering and propulsive efficiency. This report contains the results of the Post-Trial Analysis activities. Section II describes the physical characteristics of the tows used in the trials. Section III describes the geography of the trial area, field survey activities, and current measurements undertaken to support the tow tests. Section IV describes the instrumentation, equipment, and procedures used during the trials. Section V and VI contain charts, graphs, and descriptions of the EXXON NASHVILLE and EXXON LAKE CHARLES steering tests. Section VII discusses the steering test performance. Section VIII describes the performance of the Exxon tows during straight course, speed-power runs. Section IX discusses the special backing and stopping tests performed. Section X describes the data reduction activities. The Appendices and list of References follow Section X in which Appendix A lists the EXXON NASHVILLE test activity sequence and Appendix B lists the EXXON LAKE CHARLES test sequence. Appendices C and D give the shaft horsepower measurements obtained for the EXXON NASHVILLE and EXXON LAKE CHARLES, respectively. Appendix E contains the fuel measurements obtained by Exxon personnel for both tests and Appendix F shows a sample of the processed tow performance data. References follow Appendix F. NOTE: This file is large. Allow your browser several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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