CONTENTS 



CHAPTER 74— THE DESIGN OF THE MOVABLE APPENDAGES AND CONTROL SUR- 

 FACES 



74.1 General 706 



74 . 2 Positioning Rudders and Planes 706 



74.3 Single or Multiple Rudders? 708 



74.4 Shaping the Rudder and the Adjacent 



Portion of the Ship 709 



74.5 Design Procedure for Conflicting Steering 



Requirements 713 



74 . 6 First Appro.ximation to Control-Surface Area 713 



74.7 Determining the Proper Areas of Various 



Control Surfaces 715 



74.8 Positioning the Stock Axis Relative to the 



Blade; Degree of Balance 720 



74.9 Selection and Proportioning of Chord wise 



Sections 722 



74 . 10 Structural Control-Surface Design as Affected 



by Hydrodynamics 723 



74 . 1 1 Design Notes for Motorboat Rudders . . . 724 



74.12 Design of Close-Coupled and Compound 



Rudders 726 



Conditions Calling for Tubular Rudders . . 726 



Closures for Rudder Hinge Gaps 726 



Rudder Designs for Alternative Sterns of 



ABC Ship 727 



Design Notes for a Contra-Rudder .... 729 

 Design of a Contra-Horn for the ABC 



Transom-Stern Ship 733 



Design for Rapid Response to Rudder Action 735 

 Utilization of Automatic Flap-Type Rudders 



and Diving Planes 735 



Design Notes for Bow Rudders; Rudders for 



Maneuvering Astern 735 



General Design Rules for Bow and Stern 



Diving Planes 736 



Contra-Features for Diving Planes .... 736 



Setting Neutral Control-Surface Angles . . 736 

 Selection of Swinging Propellers for Steering 



and Maneuvering 737 



CHAPTER 75— THE PROBLEM OF HULL SMOOTHNESS AND FAIRING 



75.1 General Considerations; Definitions .... 



75.2 The Importance of Smoothness and Fairing 



75.3 Specific Smoothness Problems on the Shell 



Plating 739 



75 . 4 The Utilization of Casting or Welding Fillets 



75 . 5 Inside Corners Requiring Negligible Fillets . 



75.6 The Fairing of Appendages in General . . . 



75 . 7 Recessed Lifting and Mooring Fittings . . . 



75.8 Fairing the Enlargements Around Exposed 



Propeller Shafts 744 



The Fairing of Propeller Hubs in Front of 



Simple or Compound Rudders 745 



The Fairing of Exposed Shafts at Emergence 



Points 746 



The Termination of Skegs and Bossings . . 747 



Precautions Against Air Entrainment . . . 747 



Design Notes for Shallow Recesses .... 748 

 Practical Problems in Achieving Underwater 



Smoothness and Fairness on a Ship . . . 749 



CHAPTER 76— THE DESIGN OF SPECIAL HULL FORMS AND SPECIAL-PURPOSE CRAFT 



76.15 



Classification of Special Hull Forms and 76.16 



Special-Purpose Craft 750 76.17 



The Design of Fine, Slender Hulls; Canoes, 



Racing Shells, and Fast Launches .... 752 76 . 18 



Ultra-High-Speed Displacement Types . . 754 76 . 19 

 Long, Narrow, Blunt-Ended Vessels; Great 



Lakes Cargo Carriers 755 76.20 



The Design of Dry-Cargo Vessels with Box- 76.21 



Shaped Holds 762 76.22 



The Design of Straight-Element Hulls ... 762 76.23 

 Partial Bibliography on Straight-Element 



Ship Designs 764 76.24 



Drawing Ship Lines with Developable Sur- 

 faces 765 76.25 



Design of Discontinuous-Section Forms; 



Blisters and Bulges 768 76.26 



Vessels with Fat Hull Forms 770 76.27 



Requirements and Design Notes for Fishing 



Vessels 770 76.28 



Partial Modern Bibliography on Fishing 



Vessels 771 76.29 



Fireboats or Firefloats 774 76.30 



Distinguishing Design Features of Self- 



Propelled Dredges 777 76.31 



Self -Propelled Box-Shaped Vessels 779 76.32 



76.33 



Self-Propelled Floating Drydocks 779 



Design of Temporary Bows for Emergency 



Running and Towing 781 



Floats for Pontoon Bridges 782 



Yacht-Design Requirements; Some Aspects 



of Sailing- Yacht Design 783 



Brief Bibliography on Sailing- Yacht Design . 786 



Asymmetric Hull Forms 787 



Design Problems in Multiple-Hulled Craft . 788 

 Requirements for and References on Ferry- 

 boats 



Characteristics of Propelling Plant and Pro- 

 pulsion Devices for Double-Ended Vessels 

 Design Notes for Ferryboat Hulls and 



790 



792 



793 

 794 



Special Problems of Icebreakers and Iceships 

 Tabulated Data and References on Ice- 

 breakers 799 



Hydrodynamic Design Features of Amphib- 

 ians 806 



Vessels Designed for Beaching 808 



Some Hydrodynamic Design Problems Com- 

 mon to All Submarines 809 



Lightships or Light Vessels 814 



Life-Saving or Rescue Boats 816 



Special-Purpose Craft of the Future .... 818 



