Hamilton Jet HJ241, Manual

Page: 46 / 202

3.12
3 DESIGN BASICS
3.4 J
ET
M
AINSHAFT
A
LIGNMENT
HJ-241 / HSRX
3.4 JET MAINSHAFT ALIGNMENT
(PORT & STARBOARD JETS ONLY).
The HJ 241 Waterjet Mainshaft is inclined at an
angle of 5º to the Intake base.
When the port and starboard Jets are mounted at
the Hull Deadrise angle, the Jet Mainshafts are no
longer parallel to the keel line in plan. The following
table lists the angle deviation of the Jet Mainshaft
when the Jet base is mounted parallel to the keel
line.
FOR INTAKE BASE PARALLEL TO KEEL LINE:
B1 = Shaft angle in Plan view.
B2 = Shaft slope in Elevation.
Figure 22: Jet Mainshaft Alignment
B1
B1
MAINSHAFT CENTRELINE
INTAKE BASE LINE
MAINSHAFT ANGLE RELATIVE TO KEEL
TRANSOM
HULL DEADRISE ANGLE
30°
20°
25°
5°
10°
15°
0°
2.1°
1.7°
2.5°
0.0°
1.3°
0.9°
0.4°
B1
INTAKE
TRANSOM
ELEVATION
PLAN
STARBBOARD
PORT
KEEL LINE
4.3°
4.5°
4.7°
4.9°
5.0°
4.8°
5.0°
B2
B2
MAINSHAFT CENTRELINE
MAINSHAFT CENTRELINE
KEEL LINE