Full Scale Tests on the Longitudinal Maneuverability of Submarine

Abstract

This paper presents a method of full scale tests to determine the longitudinal maneuverability of a submarine. The basic theory upon which the tests are based, test procedures, test apparatus and some examples of test results are described. The basic theory is described with the equilibrium conditions (1), (2) and (3), and the equations of motion (4), (5) and (6). Hovering test, running trim test and longitudinal Z-maneuver test were conducted to determine the coefficients in equations (1)-(6) which include stastic and dynamic stability derivatives and control derivatives. Neutral trim test, inherent stability test, depth changing test and overshoot test were conducted to directly determine the actual ship performance, to check the results of the former tests and to confirm the validity of the basic theory.