Edgewater Networks 240IS, Owner'S Manual

Page: 133 / 219

10-22
Selection Guide
Rudder Torque Data Sheet
TORQUE DATA SHEETS
PLANING HULLS
ONLY
Boat speed:................................... knots
Number of rudders:.......................
Rudder area (projected area):......
square feet
Propeller diameter: ....................... feet
Perpendicular distance from the
rudder shaft to the propeller: ........ feet
Distance measured parallel to
the rudder shaft from the base
of the rudder to the center of
the lower bearings: ....................... feet
Average rudder chord length:....... feet
Perpendicular distance from the
waterline to the rudder base:........ feet
Rudder shaft diameter:................. inches
Shaft power:.................................. horsepower
C
B
A
C
L
C
L
Lower Rudder Bearing
A = Perpendicular distance
from the rudder shaft to
the propeller.
B = Distance parallel to rudder
shaft from rudder base to
center of lower rudder
bearing.
C = Perpendicular distance from
waterline to rudder base.
Note:
Formula
presumes 23-27%
counterbalance
Projected area of rudder =
(H+W) - (C+B )
PLEASE TAKE A MOMENT TO COMPLETE
THIS FORM AND
RETURN IT VIA FAX TO: 604-279-2202
FORMULA
DATA
NOTICE
Please include a detailed drawing of your rudder to
assist with rudder load calculations.