At A Higher Level
The Difference It Can
For those seeking the ultimate in speed,
maneuverability, efficiency and dependability, nothing matches the Arneson
Surface Drive Concept.
Simply put, Arneson Drives are among the most
efficient marine propulsion systems in the world. Their surface-piercing propeller
design reduces underwater drag. by 50% compared to conventional submerged
drive systems. The only surface to contact the water are the
propeller blades and a protective skeg. This results in higher
overall speed, quicker acceleration, and a better payload to power
And 50% less drag significantly improves fuel economy while
lowering operating costs. As speed increases, so do
performance and operating benefits.
Thousands of these drives have been
successfully operated for many years on pleasurecraft,
commercial and military applications throughout the
world. So today you have tested performance and
reliability in Arneson Drives to fit craft from 30 to 200ft.
When a piercing propeller is used in
conjunction with an Arneson Surface Drive system, you have the
ability to adjust the propeller submergence while under
way. This has an effect similar to varying the diameter
of a fully submerged propeller and allows one propeller to
match a wide range of vessel operating conditions. This
capability is also similar to adjusting the pitch on a
controllable pitch propeller.
The ability to trim the drive allows
the propeller submergence to match the engine horsepower
output, thus converting more horsepower to thrust while the
engine is operating within its power curve.
Surface piercing propellers ventilate to the surface rather than cavitate
under the hull. This reduces noise and eliminates destructive
erosion of the hull and propellers.
The design of the Arneson Drive system eliminates
all underwater appendages. And the surface drive system operates in
protected water behind the hull. Access to shallow water harbors and
prime cruising grounds is enhanced.
Propellers are accessible because they are not
buried deep under the hull but are protected by the boat's swimstep or
cockpit overhang. With the drives raised, the propellers can be
easily removed from the swimstep, a dock, or in shallow water.
Directing the propellers (articulation) provides
the steering control for all surface drive models. You steer with
the positive thrust of the propeller, not by vectoring propeller thrust
against a rudder. This feature gives excellent maneuverability at
Trimmable Propeller Shaft
To enhance performance and versatility, the
propeller shaft angle is vertically adjustable, even while underway.
This allows the helmsman to achieve the optimum propeller thrust angle
depending on load and sea conditions at any given time.
Positive Thrust Steering
Steering control and response time is
maximized when the propeller function is the essential directional
force. Unlike conventional systems that vector prop thrust off an external rudder, the
Arneson Surface Drive angles the propeller in the appropriate direction of
Because the Arneson Surface Drive has
positive thrust steering, it can turn tighter, with greater control than
conventional propulsion systems. Propellers are located aft, behind
the hull, increasing steering leverage and improving maneuverability at
Shallow Water Capabilities
With a trimmable propeller shaft and no fixed
underwater appendages, your craft will require significantly less draft
than conventional powered hulls. You'll have greater access to
shallow water areas.
Arneson Surface Drives are designed and
manufactured for maximum duty applications and to last the life of your
For all its sophisticated performance, it is a
less mechanically complex and fragile design than other propulsion
systems. For example, the inline models have fewer than 20 moving
parts. Since there's a more efficient relationship between parts,
there's less that can go wrong. Low maintenance and lower repair
costs are inherent to the design and manufacture.
High quality corrosion-resistant materials
matched to exacting tolerances are used in all Arneson Surface Drive
units. All models are available in manganese bronze for maximum
corrosion resistance and strength. Aluminum models are available
using a marine grade aluminum alloy.
Arneson Surface Drives are easily bolted to the
transom of the vessel. There are no complicated intake ducts to
construct or shafts that require critical alignment as with thru-hull
Does This Fit Your
Idea Of Performance?
When compared to installations of competitive propulsion systems, Arneson
Drives allow greater flexibility of engine placement. This feature
permits maximum utilization of space throughout the vessel and is
well-suited for modern aft engine room yachts.
The Connection between the marine transmission
and the drive is accomplished with universal joint (cardan)
drivelines. The length of connections depends on the distance
between a marine transmission and the drive.
There are no limitations such as shaft angle,
blade top clearance, draft, etc. to restrict selection of the optimum
diameter propeller. No other marine propulsion system is so
adaptable to such a wide range of engine sizes and types. Whether
gasoline, diesel, or gas turbine, there's an Arneson Surface Drive
designed specifically to fit virtually every power plant option, accommodating
torque outputs exceeding 30,000 ft./lbs.
Arneson Drives can bring superior power, better
overall performance and improved operating efficiencies to a broad array
of boats, both pleasure craft and commercial vessels. But to make
sure that your particular installation is appropriate and cost-effective,
we thoroughly analyze your boat's design and intended operation.
This allows the proper choice of drive, propeller size, and installation
procedure. More important, it would ensure that your Arneson Surface
Drive will live up to your expectations.
For more information on putting the power of
Arneson Surface Drives behind your boat, call Twin Disc at (414)634-1981.