Sohreibev 3 Bentkowsky and Kerr 



AFT HATCH 

 LOCATION 



FWD, HATCH 

 LOCATION WITH 

 SKIPJACK SAIL 



REMOVABLE SECTION 



FED. HATCH 

 LOCATION WITH 

 PERMIT SAIL 



SKIPJACK 

 SAIL 



NOTE : THE MODEL SAIL ASSEMBLY 

 COULD BE ROTATED ±22.5 

 AND 45 DEGREES 



ALL DIMENSIONS IN INCHES 



Fig. 16, 1/30 Scale Submarine Model 



The submarine model was mounted on a flat rectangular plate, 

 1/2" X 40" X 45", to distribute the load on the ground plane. The 

 roll positions of the planes and sail were adjustable to simulate sub- 

 marine roll angles of 0, ± 22,5, and 45 degrees. 



The DSRV model (1/30 scale), shown in Fig. 17, was con- 

 structed principally of aluminum. The diameter of the model was 

 3,3 inches and its overall length, 19.73 inches corresponding to a 

 full-scale length of 49.33 feet. The transfer bell extended 1,3 

 inches below the baseline of the DSRV hull. 



Instrumentation 



The overall steady- state forces and moments acting on the 

 DSRV model were measured by a strain-gauge balance mounted on 

 the end of the supporting sting within the model. A type T-0,75 

 (i.e, , 3,4 inch diameter) six-component internal strain gauge was 

 used for the test program. 



A seven-track FM tape recorder was used to record the 

 balance outputs and to provide a time code in order to locate specific 

 data for later analysis. Additionally, a switching network was pro- 



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