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
Prior to takeoff the pilots are going through a list of items to check their condition and configuration.
There are loads of hydraulic pumps and transfer units that make distinct noises.
You’re most likely hearing the trim and flaps position to take off configuration and likely a few other control surfaces too.
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