I seem to remember a bloke from the US Patent Office saying that gizmos to spin wheels up prior to landing were the single most common submission from inventors. Everyone sits at home, sees a movie with that 'Scrrrrrtch!" noise dubbed over a landing, and goes "Oooh! I bet you could save loads of wear if..."
Said officer went on to say that, unsurprisingly, there were a number of methods on file, and that nobody from the airlines or manufacturers had ever found them economical to implement.
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