Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 12 Propulsion Devices - Chapter 1 Propellers - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 1 Propellers

1.1 Application

1.1.1 This Chapter is to be read in conjunction with the General Requirements for Machinery in Pt 9 General Requirements for Machinery.

1.2 Power ratings

1.2.1 In this Chapter where the dimensions of main propulsion components are determined from shaft power, P, in kW, and revolutions per minute, R, the values to be used are those defined in Pt 9 General Requirements for Machinery.

1.3 Highly skewed propellers

1.3.1 The maximum skew angle of a propeller blade is defined as the angle, in projected view of the blade, between a line drawn through the blade tip and the shaft centreline and a second line through the shaft centreline which acts as a tangent to the locus of the mid-points of the helical blade sections, see Figure 1.1.1 Definition of skew angle.

1.4 Supercavitating propellers

1.4.1 A supercavitating propeller is defined as one in which the sheet cavity is designed to cover the entire blade width over at least the outer 50 per cent of the blade span.

Figure 1.1.1 Definition of skew angle
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