Ship

ITTC – Recommended
Procedures and Guidelines
Testing and Extrapolation Methods
Propulsion, Performance
Propulsion Test

7.5-02
-03-01.1
Page 1 of 14
Effective Date
2002

Revision
01

Table of Contents
1
2

3.3.2.1 Propeller Thrust .............................7
3.3.2.2 Propeller Torque ............................7
3.3.3 External Tow Force.......................7
3.3.4 Rate of revolution..........................8
3.3.5 Sinkage and trim ...........................8
3.3.6 Speed .............................................8
3.3.7 Thermometer .................................8

PURPOSE OF PROCEDURE .............2
PARAMETERS .....................................2
2.1 Data Reduction Equations.................2
2.2 Definition of Variables.......................2

3

DESCRIPTION OF PROCEDURE ....3
3.1 Model and Installation.......................3
3.1.1 Models...........................................3
3.1.1.1 Hull Model ..................................... 3
3.1.1.2 Propeller/Propulsion Unit Model

3.4 Test Procedure and Data Acquisition8
3.4.1 Methods.........................................8
3.4.1.1 Load Varying (or Constant
Speed) Method ...............................8
3.4.1.2 Constant Loading Method ..........8
3.4.1.3 Mixed Loading Method...............9
3.4.2 General Remarks ...........................9
3.4.3 Skin friction correction force ........9
3.4.4 Measured Quantities....................10
3.4.5 Shaft Tare Test ............................10
3.4.6 Correction to Measured
Forces ..........................................11

3

3.1.2 Installation.....................................4
3.1.2.1 Hull Model ..................................... 4
3.1.2.2 Propeller/Propulsion Unit
Model ............................................... 4
3.1.3 Measurement Systems..................4
3.2 Instrumentation..................................4
3.2.1 Thrust ............................................4
3.2.2