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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 External Tow Force.......................6
3.2.3 Torque ...........................................6
3.2.4 Rate of Revolution ........................6
3.2.5 Speed .............................................6
3.2.6 Sinkage and Trim ..........................7
3.2.7 Temperature ..................................7
3.3 Calibration..........................................7
3.3.1 General Remarks ...........................7
3.3.2 Propeller dynamometer: ................7

Updated

3.5 Data Reduction and Analysis..........11
3.6 Documentation .................................13
4

VALIDATION .....................................14
4.1 Uncertainty Analysis........................14
4.2 Benchmark Tests..............................14

5

REFERENCES ....................................14

Approved

Specialist Committee: Procedures for Resistance, Propulsion and Propeller Open Water Tests of 23rd ITTC 2002
Date

23rd ITTC 2002
Date 2002

7.5-02
-03-01.1

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

Page 2 of 14
Effective Date
2002

Revision
01

Propulsion Test
1 PURPOSE OF PROCEDURE

J=

Advance Coefficient

The purpose of the procedure is to ensure
consistency of methodology and the acquisition
of correct results for the Propulsion Test.
The procedure addresses model scale only
and does not consider extrapolation and full
scale prediction.
The procedure is generally applicable for
self propulsion tests performed with models
propelled by screws, ducted propellers, tipplate propellers, propellers with vane wheels, contra-rotating propellers, Z-drives, podded
drives, cycloidal propellers and paddle wheels.

V
gL
VL
Re =
ν

Fr =

Froude Number
Reynolds

V
nD

Number

Frictional Resistance Coefficient –
ITTC 1957 Model-Ship Correlation Line
CF =

0.075

( log10 Re − 2 )

2

Skin Friction Correction Force:
The...
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