Power Consumption Speed and Range

"How far will the harbour launch go and how long will it last?"

The chart and graphs below illustrates the important relationship between speed and range. The principles at work here are not unique to electric boats, but are common to all displacement hulls from row boats to freighters. Studying these figures, you will see that the boat uses very little energy traveling at low speeds and that the rate of energy consumption increases substantially as the boat reaches its maximum speed (hull speed). As well, the boat's range decreases substantially as speed increases. Viewing the last three lines of the chart (or the end of the graphs) you will note that the boat will use 30% of it's power, consuming a full 10 amps, to accelerate from 4.2 to 4.5 Knots. This 0.3 Knot advantage can be a very inefficient use of power reserves. On the other hand, at the slower end of the scale, the same 10 amps can push the launch at 3.3 Knots for 11 hours.

So...How far will the Launch go? Anywhere from 16 to 110 nautical miles.

How Long will a charge last? Anywhere from 3.5 to 110 hours.

Note: 1 Knot = 1.85 KMH and 1 Knot = 1.15 MPH