Marine engine environment
4
Full throttle operating range
The performance of any marine engine is largely
dependent upon the correct matching of the propel-
ler to the horsepower available from the engine. All
Volvo Penta engines have an operating speed range
where the engine develops its rated horsepower, this
is titled "Full Throttle Operating Range". A propeller
that has been sized to demand the rated horsepower
of the engine will allow the engine to operate at its
rated speed. Should the propeller load be less than
the rated horsepower the engine will operate above
the specified range. A propeller load that is greater
than the engines rated horsepower will result in the
engine not being able to reach the rated rpm and will
therefore overload the engine.
An engine in a newly launched vessel is likely to be
exposed to the lightest loads. This is because the to-
tal displacement of the vessel has yet to be reached,
the hull has not become fouled and all onboard sys-
tems are running at optimal efficiency. It is therefore
important that after launching and on sea trials the
engine be able to achieve slightly more than the rated
rpm under normal conditions.
Summary of Contents for D11 series
Page 1: ...Marine Propulsion Diesel Engines Installation 1 1 D E D5 D16 series ...
Page 2: ......
Page 208: ...206 References to Service Bulletins Group No Date Concerns ...
Page 209: ...207 Notes ...
Page 210: ...208 Notes ...
Page 212: ...7748655 English 11 2007 ...