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The theory and design of British shipbuilding online

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Curves thereon 38

Draught, Light 16

Dropping a Weight Overboard,

effect of 103

Dynamical Stability and Defini-
tion of 98

Dynamical Stability, Moseley's

Formulae 99

Eddy-making Resistance ... 113

Effective Horse Power 117

Effect of Dropping a Weight

Overboard 103

Effect of Free Water in the

Tanks 70

Effect of Inclination and Suc-
cessive Metacentres ... 57
Effect of Superstructures ... 146
Effect on Initial Stability due to

adding Water Ballast ... 75
Effect on Stability due to a ves-
sel being partly in mud ... 85


Effect on Stability when passing

from Salt to Fresh Water ... 81

Equilibrium, Neutral ... ... 44

Stable 44

Unstable 44

Estimate of required amount of

Displacement ... ... 26

Estimating Horse Power ... 123

Estimating Trim 108

Example of Inclining Experiment 66

Experiment, Inclining ... ... 61

Experiments, Model ... ... 115

Extended law of Comparison... 125

Extreme Breadth 2

Five, plus eight, minus one rule 6

Flotation, Centre of ... ... 41

Formulas, Attwood's 93

for Block Co-efficient 26
Freeboard and reasons for its

Provision ... ... ... 147

Freeboard, Corrections for ... 150

Curves 149

Effect on Stability... 148

Effect on Strength... 148
Free Water in the Tanks, effect

of 70

Frictional Resistance Ill

Froude's, Mr., Experiments ... 112

G. M. by Experiment
G. M., Values of...
Gravity, Centres of
Gross Tonnage ...





Grounding, Loss of Initial Sta-
bility .... 81

Heeling of Sailing Ships produced

by Wind Pressure 100

Heights of Centre of Gravity,

Co-efficients for 69

Hogging ... ... ... ... 143

INDEX Continued.



Horse Power ... ... ... 110

Effective 117

,, Estimating ... 123

,, Indicated... ... 117

,, Nominal ... ... 122

Hull Efficiency 121

Hull Weight 28

Inclination, Effect of, and suc-
cessive Metacentres ... 57

Inclining Experiment ... ... 61

Inclining Experiment, Example

of 66

Independent Method of Estim-
ating H.P 127

Indicated Horse Power 117

Indicated Horse Power, Com-
position of andLosses in ... 119

Inertia, Computing the Moment

of Section ... ... ... 144

Influencing the Shape of Stabil-
ity Curves ... ... ... 96

Initial Stability, Effect on, due

to adding Water Ballast ... 75

Law of Comparison, Extended 125

Length between Perpendiculars 1

Length Overall ... ... ... 2

,, Registered ... ... 1

Light Draught 16

Lightweight 16

Lines, Construction of ... ... 32

Liquid Cargo in the Holds of

Vessels, effect of 70

Loading of Ships, Positive and

Negative 143

Loads, Curve of ... ... 142

Longitudinal B. M. ... ... 104

,, Centre of Buoy-
ancy and Trim 30
Metacentre ... 104
Metacentre, Calcu-
lation for . 104

Loss ot Initial Stability due to

Grounding ... ... ... 81

Mean Draught Displacement . . . 40

Mean Water-line 36

Measured Mile, Progressive

Trials on ... ... ... 130

Measurement and Computation

of Tonnage 153

Metacentre, Calculation for

Longitudinal ... 1 04
,, Calculation for

Transverse ... 51
,, Definition of

Transverse ... 46
,, Formulae for

Transverse ... 47

,, Longitudinal ... 104

Metacentric Diagram 51

,, Height, Values of... 50

Stability 57

'Midship Section, Area Co-
efficient ... ... ... 23

Model Experiments ... ... 115

Method Es-
timating H.P. 127
Moment of Inertia of Section ... 144
Moments and Centres of Gravity 4
Moment to Change Trim 1" ... 107
Moseley's Formula? for Dynam-
ical Stability ... ... 99

Moulded, Breadth 2

Depth 3

Multipliers, Simpson's 4

Net Registered Tonnage ... 155

Nominal Horse Power .. .122

Overall Length ... ... ... 2

Partial Awning Deck Vessel ... 162
Perpendiculars, length between 1

INDEX Continued.


Planimeter ... ... ... 35

Power, Effective Horse... ... 117

Horse 110

,, Indicated Horse ... 117
Precautions necessary on Trial

Trips 132

Pressure, Centre of, on Rudders 137
,, On Rudder, Calcula-
tion for 136

,, On Rudders ... 136
Prismatic Co-efficient of Dis-
placement ... ... ... 23

Progressive Trials on Measured

Mile 130

Propeller Horse Power ... ... 119

Slip 119

Propelling Space, Tonnage of ... 156

Propulsive Co-efficients ... 118

Raised Quarter Deck Vessel ... 161

Registered Breadth ... ... 3

Depth 3

,, Length ... ... 1

Relation of Co -efficients to each

other 25

Reserve of Buoyancy ... ... 147

Resistance ... ... ... Ill

Air 115

,, Eddy-making ... 113

,, Frictional Ill

,, Tow-rope ... ... Ill

,, Wave -making ... 113

Rudder, Centre of Pressure on 137

Head, Diameter of ... 139
Rudder Head, Twisting Moment

in 137

Rudders, Types of 135

Rudder, the Pressure on ... 136
Rules, Board of Trade for Free-
board 148

Rules, Five, plus Eight, minus

One ... 6

Rules for Finding Areas ... 4


Rules Simpson's First ...
,, Simpson's Second
,, Six Ordinate

Sagging ... 143

Sailing Ships, Heeling produced

by Wind Pressure 100

Scale, Displacement

and Various

Curves thereon... 38

Shade Deck Vessel 162

Shearing Forces, Curve of ... 142

Sheer Draught ... 32

Shelter Deck Vessel 160

Simpson's First Rule 4

Simpson's Second Rule... ... 6

Sinkage in Inches when passing

from Sea to River Water... 19
Six Ordinate Rule ... ... 7

Slip of Propeller 119

Spar Deck Vessel 159

Speed length Ratio 128

,, to obtain True Mean ... 132

Trial Trips 129

Stability, Case of Vessel in Dry

Dock 82

,, Conditions of Initial

Statical 44

,, Construction of Dy-

namical Curve of ... 99
,, Cross Curves ... 95

,, Curves Influencing the

Shape of 96

Dynamical and Defi-
nition of ... ... 98

,, Effect on, due to Ves-

sel being partly in

Mud 85

,, Effect on Passing from

Salt to Fresh Water 81
j, Loss of Initial, due to

Grounding ... 81

,, Longitudinal ... 104

INDEX Continued .


Stability, Metacentric ... ... 57

,, Moseley's Formulae ... 99
,, Ordinary Curve of ... 94
Sailing Ships ... 100
,, Statical, at large An-
gles of Inclination. . . 92
Steering of Ships ... ... 135

Strains caused by Positive and

Negative Loading ... ... 141

Stream Line Theory ... ... Ill

Strength of Ships 141

Stress, Formulae for ... ... 144

Subdivision of Intervals ... 7

Superstructures, Effect of ... 146

Surface, Wetted 30

Tipping Centre 41

Tonnage 153

Gross 154

, Measurement and Com-
putation ... ... 153

Net Register ... ... 155

Under-deck 153

Tons per Inch ... ... ... 17

Tow Rope Resistance ... ... Ill

Transverse B. M. 46

,, Metacentre, Calcula-
tion for ... ... 51

Transverse Metacentre, Defini-
tion of ... ... ... 46

Transverse Metacentre, Formulae

for 47

Trial, Coal Consumption on ... 134

Trials, Turning 139

Trial Trips, 129

Precautions necess-
ary on ... ... 132

Trim and Moment to Change

Trim 1" 106

True Mean Speed, to obtain... 132



... 137




Twisting Moment


Types of Rudders
Types of Vessels
Types of Vessels, Awning Deck
,, Combined Poop

and Bridge 161
Full Strength 159

,, Partial Awning

Deck ... 162
Raised Quar-

ter Deck ... 161
Shade Deck... 162
Spar Deck ... 159
Three Island 160

Under Deck Tonnage ... ... 153

Values of Metacentric Heights
Vertical Centre of Gravity
Volumes ..




Wake Gain 119

Water Ballast, Effect on Initial

Stability due to adding... 75
Water, free, Effect of, in the

Tanks 70

Waterline, Mean 36

Waterplane, Area Co-efficient ... 24

Wave-making Resistance ... 113
Weight, Change of Trim adding

or deducting a ... 108

,, Curve of 141

,, Position to place, so
that the Draught Aft

is unaltered ... ... 110

Wetted Surface . . 36



Marine Engineering,
Navigation, Etc.





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Online LibraryAmos Lowrey AyreThe theory and design of British shipbuilding → online text (page 13 of 14)