Boating and Sailing.pdf - Moja ladja

Chapter 2: Power to the People—Marine Engines
◆ Because the lower unit can be steered, trimmed, and tilted like an outboard, maneuverability
and performance are better than with most conventional inboards.
◆ Inboard/outboards are usually quieter than outboards.
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The inboard/outboard combines
an inboard engine with
the lower unit of an outboard.
Advantages include
better maneuverability and
control of trim than found in
inboards, more power, and
quieter operation than found
in outboards.
(Photo credit: Jerry Martin
Associates)
The Volvo Penta DuoProp
system is a special kind of
stern drive that features two
propellers that counter-rotate
on a single shaft. This system
gives outstanding performance
and cuts steering wheel
torque.
(Photo credit: Volvo Penta
Corporation)