34 



REGULAR SERIES 



629. Propulsion Tests of Model 3839 Representing U.S. Maritime Commission 



Design C1-M-AV8, by A.Q. Aquino. Jan 1948. 3 PP- Distributed only upon 



authorization of United States Maritime Commission. 



630. Results of Additional Experiments with a Model of the Revised G-60 Sled- 



Type Towing Target, by Jack Posner. Jan IQ'-I-B. 12 pp., 5 figs. 



631. Hydrostatic Pressure Test of the Submarine Rescue Chamber YRC-6, by 



John W. Day. Sep 1949- 14 pp., 8 figs. 



632. Preparation of Data for Computation of Vertical Flexural Modes of Hull 



Vibration by Digital Process, by Alice W. Mathevjson. Sep 194-9. T3 

 pp. , 8 figs. 



633. Tests to Determine Strength of Safety Harnesses for Aircraft Pilots, 



by G.B. Mayfield and Mary C. Crook. Oct 1948. 5 PP- . 6 figs. 



634. Effect of Skeg Design on the Power Characteristics of a Twin-Screw 



Passenger and Trailer Ship as Predicted from Tests with Models 

 4013, -1, -2, -3, by M.S. Harper. May 1950. 30 pp., 10 figs. 



Distributed only upon authorization of Sun Shipbuilding and Dry Dock Company. 

 635. 



636. ' ■ 



637. Hydrostatic Tests of Low- Pressure Bronze Valves and Fittings, by 



Clayton L. Pittiglio and James G. McGinley. May 1949. 18 pp., 

 7 figs. 



638. Hydrostatic Tests of High-Pressure Steel Valves and Fittings, by 



Clayton L. Pittiglio, May 1949- 10pp., 6 figs. 



639. Tests of a 20-Foot Model of a Proposed Twin-Screw Passenger and Trailer 



Ship to Determine Shaft Horsepower, by R.E. Frisby and C.J. Wilson. 



Mar 1948. 40 pp. , 29 figs. Distributed only upon authorization of Sun Ship- 

 building and Dry Dock Company. Supersedes Report 578. 



640. Sliallow Water Effect on the Performance of Single-Screw Vessels of U.S. 



Maritime Commission Design, Determined from Resistance, Propulsion, 

 and Sinkage Tests of Models, by W.H. Norley. Feb 1948. 31 pp., 21 



figs ; Distributed only upon authorization of United States Maritime Commission. 



641 . Results of Additional Experiments with Models of the BuShlps Design 



"A" Boat-Type and TMB Design Towing Targets, by R.M. Adler and Jack 

 Posner. Mar 1948. 11 pp., 3 figs. 



642. Welding Test 357 - Tensile Strength of Gladded and Uncladded Butt 



Welds Made in 60-Pound Special-Treatment Steel, by C.L. Pittiglio. 

 Aug 1948. 7 pp. > 3 figs. 



643. Levels and Frequency Distribution of Noise in the Test Basins of the 



David W. Taylor Model Basin, by V.L. Chrisler and M.L. Lasky. Jun 

 1948. 11 pp. , 14 figs. 



