 The hull form was very full @-@ bodied , especially at the forward magazines , where the torpedo protection system added width to the beam . Coupled with the relatively low length @-@ to @-@ beam ratio of 7 @.@ 14 : 1 , this meant that very powerful turbines were necessary to achieve even modest speeds . Stalin 's decision that the Project 23 @-@ class ships would use three shafts instead of four increased the load on each shaft and reduced propulsive efficiency , although it did shorten the length of the armored citadel and thus overall displacement . <unk> height was designed at 3 @.@ 4 meters ( 11 ft 2 in ) and the tactical diameter was estimated at about 1 @,@ 170 meters ( 3 @,@ 840 ft ) . 
