Hamilton Jet HJ241, Manual

Page: 37 / 202

3.3
3 DESIGN BASICS
3.2 H
ULL
D
ESIGN
HJ-241 / HSRX
Adjustment of Listed Hull Reaction Forces to Suit
lower Design Powers.
For lower "Design Power" values, the Hull Reaction
Forces can be adjusted by using the following
approximate equation:
"Your force" = K
pr
x "Listed Force".
"Where: K
pr
” = (Your Design Power / Listed
Design Power)
2
/
3
rds.
Table 1: Table of Dimensions for HJ-241 Jet Unit
HJ-241 JET - RELEVANT DATA
D
ESCRIPTION
S
YMBOL
U
NITS
V
ALUE
Maximum Power P Kw 260
Centre Line Height H m 0.284
Mean Inlet Depth h m 0.04
Steering to Base Centre D
s
m 0.92
Reverse to Base Centre D
r
m 1.25
Transom to Base Centre D
w
m 0.415
Centre to Reverse Arm D
a
m 0.15
Waterjet Angle a degrees 5°
Table 2: Table of Hull Reaction Forces for HJ-241 Jet Unit
HULL REACTION FORCES - HJ-241 JET
D
ESCRIPTION
S
YMBOL
U
NITS
A
HEAD
/
S
TEERING
R
EVERSE
Axial Load in Hull Bottom F kN 9.1 -13.46
Vertical Load in Base Wv kN 1.51 4.51
Side Load in Base Ws kN 7.80 6.37
Vertical Moment M kN
m
5.39 4.73
Steering Moment Ms kN
m
7.18 8.84