Yehiole Dynamics Associated with Submarine Rescue 



12-FT DIAMETER 



AIR FLOW 



DSRV MODEL 



SUNKEN 



SUB 



MODEL 



SEA BOTTOM PLANE 



FIXED SUPPORT STRUT - 



DOWNSTREAM ELEVATION 



SJDE ELEVATION 



Fig, 13, Arrangement of 'the Test Section and Support System 



pitch angles of 45 degrees were obtained using a bent sting. 



The l/30th scale submarine model was situated on a ground 

 plane installed to simulate the ocean floor, and was oriented both 

 into and normal to the current at 0, ± 22,5, and ± 45 degree roll 

 positions. For these mating positions, the DSRV model was set at 

 various attitudes when approaching the submarine model along its 

 longitudinal axis and from the side (athwartships). Photographs 

 of the actual model installation for various mating conditions on the 

 forward and aft hatches are shown in Figs. 14 and 15, 



The displacement between the two bodies was regulated by 

 vertical movement of the sting mount which supports the DSRV. 



Models 



The i/30-scale model of the bottomed submarine, shown in 

 Fig. 16, was constructed of poplar wood. The diameter of the 

 model was 1.07 feet and its overall length was 8,2 feet. The model 

 was constructed with a removable aft section in order to position the 

 DSRV sting- support, which is located vertically along the centerline 

 of the tunnel, over the area of the forward hatch. The model was 

 also provided with a small and a large sail in order to simulate 

 Permit (594) and Skipjack (588) class submarines. The forward 

 hatch locations with the small and large sails was as shown in Fig. 5, 

 Only one location of the aft hatch was considered. 



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