Built for Performance
The Arneson @ Twin Disc Surface 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 propeller drive systems. The only surfaces to contact the water are propeller blades and a protective skeg. This results in higher overall speed, quicker acceleration, and a better payload to power ratio… AND… 50% less drag significantly improves fuel economy while lowering operating costs.
For work, pleasure, gas, diesel, or turbine power systems capable of torque outputs exceeding 30,000 ft. pounds, the Arneson @ Twin Disc Surface Drives come in ten model sizes and various configurations for each model. Available in, Aluminum or bronze castings, straight or drop-center models, 12 or 24 volt compatible systems, plus the new Arneson Dual-Fin surface drives available in the #8 and AI10 models.
Advantages
- 15% to 30% speed increase over conventional systems.
- 15% to 30% increase in fuel efficiency.
- More efficient than I/O’s
- Corrosion resistant
- Size adaptability, from 100 hp to over 10,000 hp applications.
- Low maintenance requirements.
- Ability to adjust propeller submergence while underway.
- Ability to adjust submergence to match horsepower output permits conversion of more thrust as appropriately needed.
- Propellers ventilate to the surface rather than cavitate under the hull reducing noise and destructive hull and prop erosion.
- Flexibility in engine installation location.
- Less Vibration than Inboard or I/O applications
- Shallow water operation (elimination of underwater appendages).
- Accessible propeller servicing.
- Steerage by the positive thrust of the propeller and not by the propeller thrust to the rudder. This is equivalent to sports car rack-and-pinion steering performance.
- For all it’s sophisticated performance, it is a less mechanically complex and fragile design than other propulsion systems.
- Most models are available in Magnesium Bronze or Aluminum.
- No limitations to shaft angle, blade top clearance, draft to restrict selection of optimum diameter propeller.
- Adaptable to a wide range of engine applications, whether gas, diesel, or turbine.
Features
Trimable Propeller Shaft
The propeller shaft is vertically adjustable, allowing selection of the optimum thrust angle for varying load and sea conditions.
Positive Thrust Steering
Unlike conventional systems that vector prop thrust off of a rudder, the Arneson Surface Drive angles in the direction of motion, maximizing steering control and response.
Responsive Maneuverability
Propellers are located aft, behind the hull, increasing steering leverage and improving maneuverability at all speeds.
Shallow Water Capabilities
The drive has a trimmable propeller shaft and no fixed underwater appendages, requiring significantly less draft than conventionally powered hulls.
AI is not affiliated with and is not an authorized Twin Disc distributor or service dealer.
