Bladeless wonder1 min read . Updated: 31 Oct 2011, 02:23 PM IST
Electric fans haven’t changed much since they were invented in 1882—blades slicing through the air to push it forward. When the engineers at Dyson first began working on a fan without blades, they started with pressurized air, forcing it through narrow apertures to create jets.But a breakthrough came when they noticed that accelerating air over a ramp amplified it 10-20 times.
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Photographs: Priyanka Parashar/Mint