CONTENTS 



Page 



CONVERSION FACTORS, U.S. CUSTOflARY TO METRIC (SI] 5 



SYMBOLS AND DEFINITIONS 6 



I INTRODUCTION 9 



II GENERAL DESIGN 9 



III COUNTERWEIGHT ANALYSIS 12 



IV CONSTRUCTION DETAILS 18 



1. General 18 



Cylinders, Pistons, and Seals 18 



Components of the Drive System 19 



Connecting Conduits and Spools 22 



Test Section 22 



Permeability Study Configuration 22 



Durability 23 



V OPERATIONAL SEQUENCE 23 



VI PERFORMANCE 24 



VII CONCLUSION 25 



LITERATURE CITED 26 



TABLE 



Significant dimensions, masses, and constants of the 



water tunnel and drive system 17 



FIGURES 



1 Drawing of the oscillatory water tunnel 10 



2 Photo of the tunnel from the reservoir end 11 



3 Schematic diagram of the tunnel and drive system 13 



4 Photo of the drive system 20 



5 Photo of the active counterweight assembly . . . . 21 



