From sunflower to walnut, linseed and pumpkin, making your own edible oils using hand-cranked oil presses can be a tedious (but satisfying and money-saving) task. But add a little wind energy, and it's that much easier; as one can see with Dutch designer Dave Hakkens' wind-powered oil press which uses a simple assembly of components to make fresh, homemade, cold-pressed oils. Check out the video (apparently the bottle in the vid took about 60 nuts to create):
Makes all that earnest hand-cranking on other oil-making videos quite unnecessary. On Dezeen, 23-year-old Hakkens describes Windoil, his wind-powered oil press:
I made an oil pressing machine which works only on wind energy. The machine is made to press nuts and seeds such as walnuts, peanuts, sesame seeds, linseeds, hazelnuts. The wind power is transformed with a worm drive [a type of gear arrangement] to make the movement slow but very powerful.
First I gather some nuts and put them in the machine. When the machine starts pressing I just sit back and relax. The leftover pulp is full of protein, great for cooking or feed your animals and plants with. The machine doesn’t use heat which means good pure cold pressed oil is produced.
As you may know, cold-pressed oils are not produced via heating to high temperatures; heating the ground paste up will produce more oil but alter the oil's nutritional value and taste, so oftentimes foodies will swear by cold-pressed oils -- even better if it's made by the wind! More info over at Dave Hakkens' website.