TEST PROCEDURE 



(The test procedure was designed to permit data collection 

 during the Builder's Trials with minimum interference with the scheduled 

 program. As the ship left the yard data were taken in shallow water and 

 with the Aft Peak Tank empty. Drafts and displacements are given under 

 Ship Characteristics . ) ** 



The remainder of the test program was conducted in deep water 

 with the Aft Peak Tank full. The displacement during these tests was 

 estimated at 11, 560 tons. Actual conditions and drafts are given under 

 Ship Characteristics and Ballast Plan on Sea Trials. Throughout the 

 test the sea condition did not exceed Sea State 1. 



During the steady speed runs, data were taken at 5 rpm incre- 

 ments, between 80 rpm and full power. Data were also taken at specific 

 operating speeds which were equivalent to the Normal, Maximum, and 

 Military ratings of the propulsion system. During the remainder of the 

 test conditions, data were taken at the convenience of the ship. For co- 

 ordination, phone communications were established between the test 

 compartment, the engine room and the bridge by the use of a temporary 

 circuit. 



(Note: If the Maritime Administration Instrument Package is used, the 

 following procedure is simplified since all channels are recorded simul- 

 taneously. ) 



The recording system used permitted data taking on two channels 

 simultaneously, as noted under Instrumentation. For convenience, three 

 runs were made at each speed increment during the constant speed runs. 

 The sequence of operation is shown in the following table, together with 

 the switch position and the corresponding pickup location: 



RECORDING PROCEDURE 



Pickup 

 Pickup Location No. 



Stern - Vertical 11827V 



Thrust Bearing Foundation - Vertical 11826V 



Stern - Athwartship 8843H 



Thrust Bearing Foundation - Athwartship 8958H 



Stern - Fore & Aft 9452H 



Thrust Bearing Foundation - Fore & Aft 8391H 



'!= Roman numeral applies to recording channel. 





Switch 



Run 



Position 



A 



I* - 1 





II - 4 



B 



I - 2 





II - 5 



C 



I - 3 





II - 6 



*=i= Shallow water data not required. 



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