The
inevitable roughening and fouling of the hulls of
older vessels can drastically increase the torque
load imposed on the main engine by the propeller.
The resulting drop in propeller revolutions can
result in reduced turbocharger efficiency, high
exhaust gas temperatures with the risk of damage
to exhaust valves and cylinder liners.
New Trailing Edge Shape
A
suitable propeller modification can restore the
correct operating environment for the engine with
no appreciable loss in either propeller efficiency
or cavitation performance. Modifying the trailing
edge shape of a propeller blade section radically
alters its hydrodynamic characteristics in the same
way as deploying the flaps on an aeroplane wing.
Afloat Modification
SMM
SHIPCARE operates a worldwide network of accredited
service facilities all backed up by the Company’s
headquarters in Birkenhead U.K.
If the vessel can be sufficiently trimmed, all work
can be carried out afloat with minimal delay.
Modification Drawing
A REMEDY FOR MAIN ENGINE OVERLOADING
The
optimum type of modification consists of a reshaping
of the blade trailing edges, possibly with a small
reduction in propeller diameter if appropriate.
The success of the modification is highly dependant
upon the trailing edge shape and should only be
entrusted to properly trained propeller technicians.
Our
sister company, STONE MANGANESE MARINE LTD, has
extensive knowledge and long experience in the design
of suitable modifications for all classes of ships.
The company offers a comprehensive service to owners
and operators and is always available to discuss
the most technically correct solution to your particular
problems.
SMM
SHIPCARE has many years experience applying these
modifications in many challenging environments
