Wisk’s Boeing injection makes it the autonomous plane frontrunner

Wisk's electric air taxi. (Image: supplied)

Thu, 27 Jan 2022

A few times a week, a deep slapping sound causes me to look up from my work to watch a helicopter swoop down over Wellington Harbour to land on the waterfront helipad.Why are helicopters so loud? Their spinning main rotor decreases air pressure above the blade and increases it below. This is ultimately what allows the helicopter to lift off the ground. But air flowing around the blade evens out the pressure and creates a vortex. When the air hits the next blade it creates sound vibrations, a sort of booming ‘slap’!If helicopters are...

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