Sivut kuvina
PDF
ePub

Complete mathematical tables specially arranged.

SYMBOLS COMMON IN NAVAL ARCHI

TECTURE USED IN THIS BOOK.

A..
S.A.
C.E.

.

.

(CE

[ocr errors]
[blocks in formation]
[ocr errors]
[merged small][merged small][ocr errors]
[ocr errors]

B
C.B.

G
C.G.
H
D

Area of load water plane.
Sail area in square feet.
Centre of effort of sail plan.
Distance of centre of effort forward of centre of im-
mersed lateral plane.

А
Coefficient of fineness of load water line =

LXB
Bilge diagonal coefficient.
Moulded breadth of ship.
Extreme breadth of ship.
Water-line breadth of ship.

HA
Coefficient of midship section area =

Bxd
Centre of gravity of displacement (centre of buoyancy).
. . Centre of gravity of displacement from aft perpen-

dicular.
Centre of gravity of ship above base.
Centre of gravity of ship and engines.
Moulded depth to upper deck.
Displacement in tons of salt water (gross).
Displacement in cubic feet (volume).
Displacement in tons at load draught.
Displacement in tons at light.
Displacement of fore body.
Displacement of after body.
Coefficient of fineness of displacement (block coefficient).
Relation coefficient.
Freeboard from statutory deck line.
Freeboard to top of rail amidship.

G
Coefficient of centre of gravity

H
After perpendicular (after side of rudder post).
Forward perpendicular (fore side of stem at upper deck).
Indicates the half-length between perpendiculars and is
the sign of the mid-section or “dead flat.”

xi

.

[ocr errors]
[ocr errors]

.

D+
D-
D
*D
8.
E.
F
Fr

[ocr errors]
[blocks in formation]
[ocr errors]

.

[ocr errors]

.

[ocr errors]

*A. Mid-section area.
M.C. Height of transverse metacentre above base.
G.Z. Stability lever.
G.M. Height of transverse metacentre above centre of gravity.
B.M. Height of transverse metacentre above centre of buoy-

ancy.
L.M.C. Longitudinal metacentre above base.

Centre of gravity below L. W.L. G

Centre of gravity above L. W.L. р

Prismatic coefficient.
I.H.P. Indicated horse power.
E.H.P. Effective horse power.
N.P. Nominal horse power.
B.P.. Length of ship between perpendiculars.
W.L. Length of ship on load water line.
wl

Water line.
0.A. Length of ship over all.
R

Placed before dimensions indicates that these are the

registered or tonnage dimensions. I.

Moment of inertia of load water plane. M

Metacentre and moment.

Moment to alter trim one inch at load line. O

On drawings locates the intersection of projected water

line with the elevation.
Centre of gravity, or moment about centre.
Centre of gravity of water line.
Centre of gravity of mid-section area.

Centre of gravity of sail plan, or centre of effort.

Ordinates or stations.

Common interval or abscissa between ordinates.
W.s. Area of wetted surface.
R

Resistance.
4G, or U, Half-girth of midship section (Lloyd's).
d.

Draught of water moulded (mean). d-> Draught of water forward <d

Draught of water aft to bottom of keel.

Mean draught
P

Power.
V
Speed in knots per hour.

Di x V 3
C
Admiralty constant =

I.H.P.
Per.

[ocr errors]

CE

[ocr errors]

.

[ocr errors]

P"

Per inch ; also tons per inch of immersion at L. W.L.
Square foot.
Square inch.
Cubic foot.

[merged small][ocr errors]

Algebraical Signs.

+ Plus, addition. Positive. A Semicircle.

Compression.
Minus, subtraction. Nega- Quadrant.

tive. Tension. Equal to.

0 Infinity. # Unequal to.

n Arc. Greater than.

Difference. * Not greater than.

() [] {} Vincula. < Less than.

C Constant. K Not less.

d Differential. X By. Multiplied by s Integration. :: Multiplied by. Ratio. Isto. f Functions. : So is. As (ratio). Divided by.g Gravity. I Perpendicular to.

k Coefficient. U Parallel to.

n Any number. * Not parallel.

a An angle. ... Because.

d Variation. .:. Therefore,

A Finite difference. Angle.

0, 6 Any angles. L Right angle.

Ratio of circumference to di.

ameter of circle. A Triangle.

p Radius. Parallelogram.

Sum of finite quantities. Square.

VSquare root. Circumference.

♡ Cube root. Circle.

nth root.

[ocr errors]
« EdellinenJatka »