Vehicle Dynamios Associated with Submarine Rescue 



distribution of mercury between, the two trim tanks. Note that all 

 mercury system weights listed represent the difference in weight 

 between mercury and an equal volume of oil. 



Wn, 



Table i summarizes the location of all tanks and the value of 



TABLE 1 

 Physical Parameters of Ballast and Trim Systems 



Wo =140,369 pounds 



'Go 



= 0.1335 feet 



The effects of variations in the weight of water in the variable 

 ballast tank on zq have been included in the basic vehicle equations 

 and the z^ variations computed in this section are due only to vari- 

 ations in the list and trim systems. 



Changes in depth effect both the density of the water and the 

 compressibility of the hull. The net effect on buoyancy, using tem- 

 peratures and salinities corresponding to sub-tropical waters cor- 

 responds to a gradient of 0.1 pounds per foot of depth. Under normal 

 conditions the required ballast change is divided equally between the 

 two variable ballast tanks. Thus, for neutral conditions 



W"6= W60+ 0.05D 



W7 = W7Q+ 0.05D 



All operations are written with t = corresponding to neutral 



1121 



