xvi CONII.NIS 



CHAPTKK 71 TllK 1)KSU;N Ol' xMlSL"KLLANKt)r.S ruoi'l 1,S1(JX DIOVICKS 



General Congitlonit ions 038 71.10 



Design Fonturi'i) of PiulclU'tnick IVopulHion . 038 71.11 

 Notes on the Hydrodyntimics of raiidlcwliwl 71 . 12 



DcaJRn . 038 71.13 



Cnlculntini; the DIndo and Wheel Proportions 71.14 



and Dimensions 041 



AltcriKitivc Methods of Determining Paddle- 71 , 15 



wheel Blade .\rca 042 



Relntion of Paddlewhoel Diameter and Pro- 71.10 



pulsion to Ship Hull Design 043 



Design Notes on Paddlewheel Details and "I I" 



Me<"hanism 045 



Variations from Normal Paddlewheel Design 648 71.18 

 Design Notes for Hydraulic-Jet and Pumj)- 



Jet Propulsion C48 



The Design of Surface Propellers 050 



Asymmetric Propulsion 651 



Feathering and Folding Propellers .... 651 



Auxiliary Propulsion for Sailing Yaehta . . 652 

 Vertical Drive for Screw Propellers; Under- 



the-Bottom Propellers 053 



Design of Devices to Produce Transverse 



and Vertical Thrust 054 



Design Features of Tandem and Contra- 

 Rotating Projjellers 655 



Design Notes Relative to Rotnting-Bladc 



Pr<ii)ellers 050 



Airscrew Propulsion 058 



Cn.VPTKR 72— DESIGN FEATURES APPLICABLE TO 

 W.VTERS 



SHALLOW AND RESTRICTED 



72.1 

 72.2 



72.3 



72.4 



72.5 



72.6 

 72.7 



72.8 



General 059 72.9 



Reference Data on River, Canal, and 

 Channel Slopes and Currents '00 



Economical and Practical SpcL-ds in Shallow 

 and Restricted Waters 000 



Design for Reduction of Confined-Water 

 Drag, Sinkage, and Squat 001 



Transverse Dimensions and Section Shapes 

 for Shallow- Water Running 002 



Typical Shallow- Water Vessels 663 



Length, Longitudinal Curvature, and Wetted 

 Surface 005 72. H 



Modifications to Normal Forms for Shallow- 

 Water Operation 666 



The Adaptation of Straight-Element Design 



to Shallow-Water Vessels 666 



Bow Shaping 667 



Slope and Curvature of Buttocks 668 



Adequate Flow of Water to the Propulsion 



Devices 668 



The Design of a Tunnel Stern 669 



Hull Surfaces .\breast Screw Propellers . . 672 



Powering of Tunnel-Stern Craft 672 



Handling of the Vibration Problem in 



Shallow Water 073 



Partial Bibliograpliy on Tunnel-Stern Vessels 673 



CHAPTER 7:3-THE DESIGN OF THI'] FIXED APPENDAGES 



73.1 General Rules for Design of Fi.\ed Objects 73.15 



in a Stream 675 



73.2 The Design of Ix;ading and Trailing Edges . 675 73. 16 

 73 3 The Stem Cutwater 670 73.17 



73.4 Selection of Struts or Bossings 077 



73.5 Strut Design for Exposed Rotating Shafte 678 73.18 



73.6 Strut-Arm Section Shapes for Ultra-High 



Speeds 080 73.19 



73.7 Appendages for the Arch-Stern ABC Design 681 



73.8 IjiyoutofContni-Struls Abaft l'n>pellers . . 082 73.20 



73.9 The Design of Bossings Around Propeller 73.21 



Shafts 082 73.22 



73 . 1 Deaign Rules for Dollcclion-Typc or Contra- 73 . 23 



Guide Bossings 686 73.24 



73.11 Vortir.al Bofurings OS Docking Keels .... 680 



73.12 Design Notes on Fixed Srrew-Propeller 73.25 



Shrouding; The Kort Nozzle 087 73.26 



73 13 Shaping and Positioning of C!ontra-VaneH 



Abaft I'addluwheelM 088 73 . 27 



73.14 Denign Funturun of Supporting Hums for 



Ruddora; Partial Skcgs 090 



Selecting the Position, Type, and Nunib<>r 



of the Roll-Resisting Keels 691 



Bilge-Keel Extent, Area, and Other Features 692 

 Structural Considerations in Bilge-Keel 



Design 694 



Design of Roll-Resisting Keels for the .\BC 



Ship 695 



Design of Docking, Drift-Resisting, and 



Resting Keels 695 



The 1 )esiKn of Fixed Stabilizing Skogs or Fins 097 

 Design of Torque-Compensating Fins . . . 099 



Fixeil Guards and Fenders 699 



Design to .X void Vibration of Appendages 700 

 Design of Water Inlet and Discharge Open- 

 ings Through the Shell 701 



Partial Bibliography on Condenser Scoops 703 



Design and Installation of Galvanic-Action 



Protectors 704 



Design Notes for l.iH-.'iling ICchu-R^inging and 

 Sound Gear on Merchant Vessels .... 705 



