Fact sheet - A-Series Waterjets0 pages

Fact sheet
Kamewa
A3-series waterjets
The new superior A3-series with Stainless Steel pump unit sets new standards
for quality and performance
Kamewa A3-series waterjet
Maximum performance at minimum weight
Improved from the best
The new Kamewa A3 series draws on experience from the
popular A -series but incorporates numerous improvements
made possible by advanced design calculation methods and
testing and production techniques.
More thrust
Kamewa A3 waterjets offer a 2-3% increase in efficiency,
which translates into reduced fuel consumption for a given
workload and consequently reduced CO2 emissions. At the
same time there is a reduction in size, weight and life-cycle
costs.
Heavy duty Stainless Steel pump unit
The new Kamewa A3 series is equipped with a fully Stainless
Steel pump unit providing the best possible durability at any
circumstances.
One size smaller waterjet can be used – significant weight
saving possible
For most applications an A3 unit one size smaller than its
predecessor can be fitted resulting in identical performance
with a weight reduction exceeding 35%. The savings in weight
has been achieved even with hydraulics being integrated onto
waterjet. Kamewa A3 offers the highest efficiency on the
market; alternatively either higher speed, larger payload or
less installed power and reduced fuel consumption for a given
size.
Improved low and high speed performance in the same
package
These advantages for the customer have been achieved
through a variety of developments. At the heart of the waterjet
is the mixed flow pump which has been significantly improved,
in particular its cavitation margin, by using the latest CFD
techniques combined with extensive testing in the cavitation
tunnels at the Rolls-Royce Hydrodynamics Research Centre.
Increased reversing thrust
A new compact and highly efficient reversing bucket provides
the highest reverse thrust levels on the market being 16%
higher than its predecessor and at the same time almost 20%
narrower. In addition to savings in weight this means also
superior position keeping and maneuverability at zero speed.
Higher speed in curves
Totally new steering nozzle in stainless steel provides 2 – 3
knots higher speed in tight turns. In addition, full scale tests
confirm the new nozzle to be significantly quieter compared to
the earlier design.
Modular interceptor trim
All Kamewa A3 waterjets can be delivered with new modular
interceptor trim tabs bolted directly onto the waterjet, including
hydraulics and control panels for electronics. Modular bolt
installation enables easy retrofitting. The interceptor trim
system improves acceleration and low speed characteristics,
in addition to trim angle adjustment.
Booster units also available
Kamewa A3 waterjets can be supplied as a steering and
reversing unit, or as boosters providing forward thrust only,
enabling the ideal system to be configured for multi-jet
installations.
Ultralight inlet duct without hydrodynamic compromises
As on all A -series, the inlet duct is fabricated by Rolls-Royce
as an integral part of waterjet unit. This means quick and cost
efficient installation at the shipyard.