ARENS ENGINE SYSTEMS
MARINE PROPULSION RVI SAIL 15
READY-TO-INSTALL PROPULSION SYSTEM
ARENS RVI SAIL 15 // Most compact inboard engines on the market
The ARENS RVI SAIL 15 is suitable for small runabouts and sailing boats. The engine, foundation and Saildrive are designed as a complete system which, at 45 kg, is only half the weight of comparable systems and requires 40% less installation space. A real innovation is the plug-and-play principle, which allows the engine to be removed quickly and easily when maintenance is required.
Powerhead – ARENS RVI 378-2Z
The heart of the system is a highly compact engine with designation “ARENS RVI 378-2Z”. It delivers 11.04 kW (15 PS) at 4,300 rpm and is the world’s first inboard engine based on a two-stroke boxer engine with common rail direct injection. The closed fuel system allows operation in unventilated engine compartments. Due to its boxer construction, the ARENS RVI engine runs very smoothly and is low in vibration. Power is controlled via a sensor on the throttle lever and no longer requires a throttle mechanism. With a maximum charge current of 58 A, the built-in generator delivers four times the charge current of outboard motors with the same power output. The ARENS RVI SAIL 15 can compete with inboard diesel engines with its fuel consumption of only two litres per hour at cruising speed.
ARENS MOTORS presents itself at METS 2021 in Amsterdam with innovative boat drives and the world’s smallest and lightest built-in marine engines!
>> FOR ALL INFOS ABOUT THE NEW DRIVE SYSTEMS CLICK HERE
We will be presenting the ARENS RVI SHAFT 15 HP to a wider audience for the first time. This means that boats with shaft drive can now finally benefit from RVI engine technology!
A revised version of the ARENS RVI SAIL 15 will also be presented.
More about this soon here!
ARENS MOTORS develops small marine propulsion systems. For our ARENS RVI Sail 15 we offer folding propeller like shown in the animation.
TRANSMISSION AND FOUNDATION – ARENS RVI SAILDRIVE
For the installation of the system, a supplied foundation is inserted into the hull of the boat, which is provided with a mounting frame and serves to fasten the engine and Saildrive. The RVI power head and its leads can be detached from the boat with just a few hand movements using quick-release couplings. At a weight of 35 kg, lifting out does not require any lifting equipment. What’s more, with its box dimensions of only 600 x 430 x 300 mm, the motor is extremely compact and easy to transport. This makes uncomplicated shipping in a crate possible, which eliminates the need to transfer the entire boat to a service workshop for maintenance. The expenditure for stationary wintering or maintenance is considerably lower compared to conventionally installed diesel engines.
Advantages
The ARENS RVI Sail 15 is an alternative to outboards, as they are usually used on smaller sailing boats. With this system, operational comfort and manoeuvrability can be significantly improved. Of course, its use is also possible in other boat types where weight and installation space are limiting factors. Last but not least, the ARENS RVI APP offers the possibility to inform yourself about the operating status of the engine via smartphone.
ARENS RVI BOXER MOTOR SPECIFICATIONS
System Design
The ARENS RVI Sail consists of the powerhead (combustion engine) and the saildrive system, which includes a powerhead pick-up device on the foundation, the foundation itself, a boot seal, and the underwater part. The outer and inner wall of the foundation box shall be trimmed to the hull shape of the ship. The cut edges of the foundation box must be permanently and watertightly connected to the hull by lamination!
| Powerhead | ARENS RVI 378-2Z (2-CYLINDER BOXER ENGINE, DISPLACEMENT 379 CC) |
| Output | 11.04 kW (15 HP) at 4,300 rpm; optional: up to 22.06 kW (30 HP) at 6,500 rpm |
| Generator | 2 V / 58 A with integrated charge regulator |
| Electric starter | 12 V / 0.6 kW (starter battery required) |
| Ignition | Electronically controlled spark ignition |
| Cooling system | Single circuit system, incl. salt water pump |
| Fuel system | Gasoline direct injection incl. pre-feed pump and pressure regulator filter |
| Lubricant system | Incl. 1 litre lubricant reservoir with pump |
| Power control | Via E-Gas (de-throttled operation, sensoric – no throttle cable necessary) |
| Engine control (ECU) | Fully automatic control of all engine operating parameters |
| Size L x W x H | 600 x 430 x 300 mm |
| Dry weight | 35 kg |
Installation on hull
The walls of the fundament box will be cutted out according to the shape of the hull and stable connected by lamination. The inner circular shaped wall is used for the implementation of the lower unit. This wall will be also laminated to the hull, such that the connection is watertight.
| Saildrive-System | ARENS RVI SAILDRIVE |
| Foundation | Ready to install incl. device for vibration-damped fastening of the motor to the foundation and sealing against seawater |
| Underwater part | Ready to install incl. reversing gear and propeller |
| Remote control | Ready to install, incl. single-lever circuit with sensor, ignition lock, push button for electric starter |
| Weight | 17 kg |
Additional options
| Saildrive-System | ARENS RVI SAILDRIVE |
Foundation| Ready to install incl. device for vibration-damped fastening of the motor to the foundation and sealing against seawater |
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| Underwater part | Ready to install incl. reversing gear and propeller |
| Remote control | Ready to install, incl. single-lever circuit with sensor, ignition lock, push button for electric starter |
| Weight | 17 kg |
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Generator
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patented fuel distributor
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high capacity pump drive
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high pressure fuel pump HDP 120-DD
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patented rotary valve system
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Throttel position encoder (servo integration equipped)
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Electronic control unit
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E-Starter
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Exhaust pipe
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Lightweight metal cast valve housing
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High pressure injectors
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Cooling water connections
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