Feature 1
facilities for flying control (exercised
from the aft island), simplifies
uptake/downtake arrangements, and
improves electromagnetic interference/
e l e c t r o m a g n e t i c c o mp at i b i l i t y
characteristics by permitting greater
antenna separation.
Re-arming capacity is a significant
factor in sortie generation rate. CVF
will have two conjoined preparation
and flight in-air material storage areas
fed by a Highly Mechanised Weapon
Handling System (HMWHS) bringing
ordnance up from deep magazines and
a hangar store. Developed by Alstec
(part of the Babcock group), the system
is based on commercial warehouse
handling principles but adapted for the
safe transport and stowage of munitions
in a warship environment.
Core components of the HMWHS The ‘Delta’ design offers a flight deck area of slightly over 16,000m
2
(well over twice the
include powered ‘moles’ to move deck estate of two Invincible class CVSs).
palletised loads around the weapon
preparation areas; a series of lifts to
connect the stores, hangar, preparation voltage is more than twice that used to disconnect individual IPMS workstations
areas, and flight deck, configured to power Type 45 and the highest ever used from the network to run training scenarios
enable simultaneous strike up and strike on a Royal Navy warship. without impacting on the operation of the
down; and a control system to provide Power for ship services (comfortably vessel. This will generate a saving in the
for automated operation and remote exceeding 10MW) will be distributed cost of providing dedicated shore-based
control. shipwide at 440V into five independent facilities.
Successful testing of a production zones. Twelve switchboards will distribute Accommodation onboard will provide
prototype system was undertaken in power, with the design enabling re-routing for a total crew (a standard ship’s
2006. This included dynamic trials using of power supplies in the event of failure. complement of 680 plus the embarked air
the QinetiQ rolling platform facility Prime movers will be widely dispersed group) of up to 1500, increasing to 1680
at the Ministry of Defence’s Boscombe throughout the ship. While the four in an ‘overload’ condition. Modular cabins
Down facility. diesel generators will be installed deep will provide for a mix of single, double,
CVF will be the first Royal Navy ship to in the ship, the two MT30 gas turbine and six berth (reconfigurable to eight
be fitted with an Integrated Full Electric alternators will be sited in sponsons high berth) spaces.
Propulsion (IFEP) system. The project up on the starboard side of 4 Deck. This Recent operating experience has
will leverage work already undertaken arrangement has been designed so that demonstrated the requirement for
by the Type 45 programme (which uses reduced ducting requirements do not improved waste management facilities to
Integrated Electric Propulsion) and the impinge on hangar space, allowing for ensure compliance with latest MARPOL
Electric Ship Technology Demonstrator easy access and removal. standards. The integrated system selected
programme in de-risking the major Two Converteam 20MW advanced for CVF will use pyrolysis technology, and
machinery associated with the IFEP induction motors will drive each of is expected to meet all currently envisaged
concept. the two shafts (fitted with a five-bladed legislation throughout the life of the two
A combination of two Rolls-Royce adjustable bolted propeller) to provide a vessels.
MT30 gas turbine alternators (initially maximum speed of over 26knots in ‘clean’ Other novel design features will include
rated at 36MW each but with growth hull conditions at start-of-life. The two an arrangement for electrical shore
potential to over 40MW) plus four propulsion motors driving each shaft can supply that requires around three cable
Wärtsilä-supplied diesel generators (two be used independently or in tandem. connections rather than the 100-plus
16-cylinder Wärtsilä 38 sets rated at L-3 Communications has been selected currently required, and – another first
11MW and two 12-cylinder Wärtsilä 38 to supply the Integrated Platform for the Royal Navy – an auto tensioning
sets rated at 9MW) will generate in excess Management System (IPMS) for CVF. mooring system that reduces the need for
of 108MW at 11kV to provide power for The IPMS will monitor in excess of 25,000 constant monitoring and adjustment of
both propulsion and ship’s services. This signals in real time. It will be possible to berthing hawsers. WT
Warship Technology January 2008 13
WT Jan - p11+12+13.indd 13 08/01/2008 10:24:11
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