Just on a plane taxiing to the runway and there’s loads of short repeated motor-like noises happening.. i hear them on most, if not all, flights, before take off – what are they?
In: Engineering
Most likely the sounds of the motors that are deploying the take off flaps. Modern planes deploy “extensions” to the wings to aid take off and landing by providing additional lift at low plane speeds and allow for shorter takeoffs. Once the plane takes off, these extensions cause drag and increase fuel consumption so they are retracted during the cruise period. When the plane comes in for landing, the pilot redeploys them so that the plane can land at a lower (and therefore) safer and more comfortable speed.
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