565
OF ENGINEERING FOBMULÆ.
Paddle Steamers—continued.
IMMERSION OF FLOATS.
In large sea-steamers from 18 to 20 inches of
water over the upper edge of float when vertical.
In small sea-steamers from 12 to 15 inches of
water over the upper edge of float when vertical.
In river steamers 2 inches of water over the
upper edge of float when vertical.
Number of floats immersed
- 4 in sea-going vessels.
— 1J to 2 in river steamers.
AREA OF FLOATS.
D = Diameter of paddle-wheels in feet.
A = Area of one float in feet.
P = Total indicated borse-power of engines.
Length of float iu feet.
L =
A =
P .
D
ordinary sea going vessels.
in
•7o P
A = ------- in fast vessels.
D .
L = 0 • 6 A in ordinary sea-going vessels.
I, — 0 • 7 A in fast vessels.
Distance of radial floats apart = 2} ft. in faat vessels.
M „ -3 ft. inflow „
Distance of feathering floats apart = from 1 to 6 ft-
PROPORTIONS OF PADDLE STEAMERS.
Length of keel .........
Breadth of beam .. • ■ — I*
Depth of vessel ______________= ‘10
Centre of paddleg from stern-post = ’45
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