Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Design stresses
   5.1 Rudder material
6 Rudder and steering arrangement, rudder types
   6.1 General
   6.2 Rudder types
7 Design rudder force calculation
   7.1 General
   7.2 Force F[1] and corresponding load case
   7.3 Force F[2] and corresponding load case
8 Rudder bending moment and reactions at bearings
   8.1 General
   8.2 Analysis of spade rudder (Type I)
   8.3 Analysis of skeg rudders (Types II to V)
9 Rudder design torque, T
10 Rudder and rudder stock design
   10.1 Load bearing parts of the rudder
   10.2 Metal rudder stock material
   10.3 Design stress for metal rudder stock
   10.4 Required diameter for solid circular metal rudder
         stocks
   10.5 Vertical variation of the diameter of a Type I
         rudder (spade)
   10.6 Round tubular stocks
   10.7 Non-circular metal rudder stocks
   10.8 Simple non-isotropic rudder stocks (e.g. wood
         or FRP)
   10.9 Complex structural rudders and rudder stocks in
         composite
   10.10 Check of deflection of Type I rudder stocks
         between bearings
11 Equivalent diameter at the level of notches
12 Rudder bearings, pintles and gudgeons
   12.1 Bearing arrangement
   12.2 Clearance between stock and bearings
13 Rudder stock structure and rudder construction
   13.1 Rudder stock structure
   13.2 Rudder construction
   13.3 FRP rudder blades
   13.4 Non-FRP rudder blades
14 Skeg structure
   14.1 General
   14.2 Design stress
Annex A (normative) - Metal for rudder stock
Annex B (normative) - Complex composite rudder stock
        design
Annex C (normative) - Complete calculation for rudders
        with skeg
Annex D (informative) - Geometrical properties of some
        typical rudder blade shapes
Annex E (informative) - Vertical variation of diameter for
        Type I rudders
Annex F (informative) - Type I rudders - Deflection of stock
        between bearings
Bibliography

Abstract

Provides requirements on the scantlings of rudders fitted to small craft with a length of hull, L[H], of up to 24 m, measured according to ISO 8666.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 188
Supersedes	ISO/DIS 12215-8 : 60.00 (2009)