Pop 25 - Possibility of auxiliary propulsion with electric outboard motors

The Pop 25 project intends to offer simplicity and reliability as its principal aims. The basic idea when developing the project was to suggest electric auxiliary propulsion as first choice. The main reason for that is the feeling that going for clean sources of energy will be irreversible. Besides, we guess the closest possible to the concept of perpetual motion we can devise is a boat primarily propelled by the wind force and alternatively by electric motor, consuming energy derived directly from sun light by means of solar panels, and indirectly by wind generator. This was our choice, and there is at least one Pop 25 with inboard electric motor installed.

However there is another option for the Pop 25 auxiliary propulsion, the electric outboard motor.

Torqeedo, the company that leads the market in the production of electric outboards, produces the Cruise 2.0/4.0 R (remote control) model that fits like a glove as auxiliary propeller for the Pop 25. The Cruise 2.0 version operates in 24V tension, providing more range, albeit less speed, while the 48V Cruise 4.0 version delivers more speed with considerably lesser range. Our preference for the Pop 25 is the longer range 2.0 model, since the drop in speed is not significant (an estimated decrease in top speed from 5kn to 4kn in flat waters with the less powerful version), while the range is increased tenfold.

The Torqeedo Cruise 2.0/4.0 provides more range or power from limited battery capacity than any other electric outboard in the market. Another feature that contributes for the adequacy of this model is its water resistance. The motor is capable of operating for a short while without damage even if totally submersed up to 1.5m deep (complete waterproof to IP 67)

The Torqeedo 2.0/4.0 R is equipped with remote control consisting of throttle and display, which provides information about battery status, GPS based speed and remaining range

The outboard motor solution has already been tested. Horus, the first boat of the class to be launched, is using a petrol 6hp outboard motor with excellent results, reaching up to five knots’ speed in the GPS when moving in calm waters.

Horus, the first Pop 25 to be launched, uses a petrol outboard motor for auxiliary propulsion. An outboard motor is undoubtedly the simplest and cheapest solution for the boat when there is no wind, requiring no more than a bracket installed in the transom scoop for its operation. Courtesy: Daniel D’Angelo

It’s ok to use a petrol outboard, however to install a long shaft Cruise 2.0/4.0 R Torqeedo is much better. If the boat has permanently installed solar panels, or is enhanced with a foldable one (Torqeedo includes a 45W foldable panel in its list of products which boosts the supply of energy in emergencies), the energy consumed can be re-stored, even though it can take some time to do that. The lithium battery bank recommended can be supplied by Torqeedo, and the installation of the whole system is of the “plug and play” type.

Click here to know more about the Pop 25.