Electric motor for a Hallberg Rassy 26
Our customer's boat is a Hallberg Rassy 26. The boat is from the year 1979.
The boat has a weight of 2,500 kg, an overall length of 7.95 m, and a waterline length of 6.7 m. Calculations result in a hull speed of approximately 6 knots, or 11 km/h.
The owner wanted to get as close as possible to the hull speed during the consultation, with a travel time of 5-6 hours at 4 knots, meaning a range of at least 20 nautical miles. The installation of the electric pod motor in the boat was successful.
Theoretical performance curve of the Hallberg Rassy 26
Desired travel time, speed & range
According to the calculated theoretical travel curve, a continuous power of around 1.3 kW per hour is required for a speed of 4 knots. For a speed of 5 knots, it is already around 3.5 kW per hour. Here you can clearly see the exponential relationship between consumption and speed.
In summary, for the customer's requirements of 4-5 knots, a motor with 4 kW power should actually be sufficient. However, to keep the boat maneuverable in wind and weather, we recommended installing a 6 kW motor – also because there are not many options on the market between 3 and 6 kW. For the desired travel time, 2 batteries with 5 kWh each are needed.
Which engine was previously installed?
Why the ePropulsion pod motor?
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Best value for money at the current time
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Personal contact person in case of service
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No annual maintenance and service, as well as the repair of wear parts
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Very many positive experiences with the motor
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Compatibility with third-party batteries
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