Yeh-iole Dynamics Associated with Submarine Rescue 



m 



4.23 



10,30 



DSRV MATING 

 BELL 



19.73 



ALL DIMENSIONS IN INCHES 



Fig. 17. l/30-ScaIe Model of the DSRV 



vided for each data input to provide direct data entry to an oscillo- 

 graph as well as the conventional "Record onto tape/Play-back from 

 tape to graph" and for quick-look at model oscillation frequencies 

 where they occurred. 



Test Conditions 



The test program (Ref, 11) consisted of 258 runs, at Reynolds 

 numbers up to 6.0 X 10® per foot, and the DSRV positioned at 6 or 

 more locations (distances from the submarine model). The data 

 were recorded for about five minutes for each set of test conditions. 



The vertical distance from the mating surface of the DSRV 

 rescue bell to the mating surface (hatch) of the submarine, Zj, was 

 varied from to at least 12 inches, which corresponds to 30 feet, or 

 about one submarine diameter, in full scale. 



As shown in Fig. 13, an angle adapter was used to obtain 

 different pitch angles, 9rv, of the DSRV, For these test conditions, 

 the angle of attach, o^rv, of the DSRV was the same as 6rv Angle 

 adapters of 0, 15, 30 and 45 degrees were used. When the sub- 

 marine model was removed from the tunnel to obtain DSRV free 

 stream conditions, the vehicle's angles of attack (pitch angles) 

 were obtained by a combination of adapter arrangements and pitch 

 of the strut mechanism. 



1157 



