CONTENTS 



CHAPTER 54— ESTIMATING THE AIR AND WIND RESISTANCE OF SHIPS— Continued 



64.10 



54.5 Notes on Wind-Resistance Models and 



Testing Techiniques 



54.6 Bibliography of Model Wind-Resistance 



Tests 



54.7 Drag Coefficients for Typical Abovewater 



Hulls and Upper Works 



54.8 Comments Concerning Wind-Friction Re- 



sistance of an Abovewater Hull 



64.9 Drag and Resistance with Wind on the Bow 



278 



Prediction of Wind Resistance for ABC Ship 



of Part 4 282 



Magnitude of Wind Pressure 283 



Location of Center of Wind Pressure . . . 284 



Lateral Wind Drag 285 



Lateral Wind Moments and Angle of Heel . 285 



Estimated Drift and Leeway 286 



Estimating the Forces on a Moored Ship . 287 



Surface- Water Currents due to Natural Wind 287 



CHAPTER 55— THE CALCULATION OF APPENDAGE RESISTANCE 



55.1 General 288 



55.2 Scale-Effect Problems 288 



55.3 Customary Values and Proportions for Over- 



all Ship Appendage Resistance 288 



55 . 4 Classification of Appendages by Predominant 



Type of Drag 290 



55.5 Lift, Drag, and Other Data for Typical 



Bodies Representing Appendages .... 291 



55 . 6 Allowances for Wake Velocities on Append- 



age Drag 292 



55.7 Shadowing Allowances for Appendages in 



Tandem 292 



55.8 Modifications in Drag for Appendages 



Abreast 293 



55.9 The Drag of Exposed Rotating Shafts . . . 293 

 55 . 10 Drag Data for Holes, Slots, and Gaps . . . 294 



55 . 1 1 Estimated Resistance of Discontinuities . . 294 



65.12 The Resistance of Large Appendages Con- 



sidered as Parts of the Ship 295 



55.13 The Calculation of Appendage Resistance 



for Submerged Vessels 295 



55.14 The Displacement of Appendages 295 



CHAPTER 56— OBSERVED RESISTANCE DATA FOR MODELS AND SHIPS 



56.1 

 56.2 



56.3 



56.4 

 56.5 



56.6 



General Comments 297 



Resistance Data from Tests of Models of 



Typical Ships 297 



Systematic Resistance Data from Model 

 Series; Taylor Standard Series with Con- 

 tours of iJ^/A 298 



Japanese Fishing- Vessel Standard Series . . 300 

 Gertler Reworking of Taylor Standard 



Series Data of 1954, with Contours of Cn . 301 

 Resistance Data for Very Fat Ships .... 303 



66.7 



Systematic Resistance Data for Parallel- 



Middlebody Variations 306 



Resistance Data for Very Low Ship Speeds . 306 

 Rate of Variation of Model Residuary Re- 

 sistance with Speed 306 



56.10 Variation of Total Resistance of Model and 



Ship with Speed-Length Quotient .... 308 



56 . 1 1 Changes in Resistance with Changes of Trim 



and Displacement 310 



56 . 12 Measured Thrusts and Towing Pulls on Ships 310 



56.8 

 56.9 



CHAPTER 57- 

 SHIPS 



-ESTIMATE OF TOTAL RESISTANCE FOR SURFACE AND SUBMERGED 



57.1 

 67.2 

 57.3 

 57.4 



67.5 



67.7 



57.8 



General 313 



Summary of Kinds of Ship Resistance ... 313 

 Ratios of Major Resistance Components . . 313 

 Methods of Approximating the Total Re- 

 sistance of a Ship 315 



Ship Friction Resistance Calculation from 



Chapter 45 31C 



Residuary Resistance Prediction from Refer- 

 ence and Standard-Series Data 316 



Telfer's Method of Predicting Ship Resist- 

 ance 318 



Analytical and Mathematical Methods of 

 Predicting Pressure Resistance 321 



67.9 An Approximation of Separation Drag . . 321 



67.10 Slope Resistance and Thrust 321 



67 . 1 1 Ship Still- Air and Wind Resistance from 



Chapter 54 322 



57. 12 Calculating the Overall Wetted Surface and 



Bulk Volume of a Submerged Object . . . 322 



67.13 Drag Coefficients and Data for Submerged 



Bodies 322 



57 . 14 Pressure Resistance of Submerged Bodies as 



a Function of Depth 323 



67 . 15 Resistance Due to Flow of Water Through 



Free-Flooding Spaces 323 



CHAPTER 58— RUNNING-ATTITUDE AND SHIP-MOTION DIAGRAMS 



68.3 



58.1 General 325 



58.2 Data for Predicting Sinkage and Change of 



Trim in Open, Deep Water 325 



General Conclusions as to Changes of Level 

 and Trim with Speed 325 



