[theultdev]

Well it does use oil.

> The 136-metre-long vessel had to rely partly on its auxiliary motor and its remaining sail after the aft sail was damaged in a storm shortly after departure.

Used the motor "shortly after departure".

[snowstorm82]

Last summer we motored ~10% of the miles.That includes full day leg when there was practically no wind and few hours occasionally with combined powering. Working towards less or fractional oil based power can have significant benefits.

[lukan]

Yes. Experiments have a tendency to show where problems are.

[theultdev]

Sails are not a new experiment.

Hundreds of years of progress and known limitations.

They failed immediately because of a storm.