Hamilton Jet HJ241, Manual

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3.11
3 DESIGN BASICS
3.3 D
RIVELINES
HJ-241 / HSRX
3.3.5 Jet Coupling Flange Details
Refer to Drawing HJ-241-02-001 Couplings and
Belts , for all relevant Coupling details.
3.3.6 Moments of Inertia
A Torsional Vibration Analysis must be carried out
for the complete drive train including Engine
Flexible Coupling, Gearbox, Driveshaft and Jet
rotational assembly, especially where a universal
driveshaft is used without a torsionally resilient
member or gearbox in the driveline. It is the
responsibility of the vessel builder to see that either
the engine manufacturer or the flexible coupling
manufacturer carries this out.
The Moment of Inertia Data for the Jet Unit is
provided below, to enable a Torsional Vibration
Analysis to be carried out.
3.3.7 Critical Speed of Mainshaft
NOTE:
1. In all cases, for the calculation of the
"Critical Speed of the Jet Mainshaft" consult
C.W.F. Hamilton & Co. Ltd.
2. The heavier splined end of the Universal
Driveshaft should be located towards the
engine.
If a heavy driveline is used then a transverse
vibrational analysis of the Jet Mainshaft should be
carried out.
Figure 21: HJ-241 Jet Mainshaft Dimensions