567
OF ENOINEEKING FORMULÆ.
Appboximaté Rule for the Speed ok Sckew
Steamers.
HP — Total indicated horse-power.
V = Velocity of vessel in knots per hour.
S = Sectional area of midship section im-
mersed, in square feet.
D = Displacement in tons.
The Values of x and k are as follows: *—
In fast troop-ships where the length is 1 x k
from 7 to 7J times the breadth amid-} 750 2G0
ships.................................I
lu line-of-battle ships and frigates ofi
deep immersion, whore the length is> 550 165
4 or times the breadth .. .. j
In frigates of lighter immersion, where)
the length is from 5 to 5| times the> 450 110
breadth ..................... ;. .. j
In gunboats of light immersion, where i
the length is about 6J times they 430 150
breadth ...........................|
lu auxiliary line-of-battle ships, where
the length is about 3j times the} 310 90
breadth ...............“...........I
* The valnes of x and k have been deduced from the mean
of a very large number of careful experiments with different
vessels on trial,
r . V3S
” being = —
k being —
V3 h»
~HV