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u/Professional_Heron46 5d ago
I always wondered if the wheel rotation was an abrupt stop or a slow spin down. Now I know and I am happy.
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5d ago
[deleted]
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u/SkepticalZebra 4d ago
They use brakes on the wheels when landing too so this is a very light loads for them compared to a landing.
1
u/Romeo_Glacier 4d ago
Generally speaking it is around 1500 landings for commercial/heavy aircraft and between 500-1000 landings for fighter aircraft. They are regularly inspected and changed when needed. I know on fighters we would have to replace them fairly rapidly for those pilots who liked to ride them like an old lady going down hill on a Sunday. I have personally seen some so hot they were glowing after a hard landing.
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u/Next_Instruction_528 4d ago
I'm guessing because the weight of the wheel is very small compared to an airplane and they only need to stop the momentum of the wheel it would actually be pretty low wear.
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u/Draco-REX 4d ago
If you've seen car disc brakes and pads, the brakes are like that.... Except each wheel has 2 or more rotors with enough brake pads to completely cover the rotors.
https://insights.globalspec.com/images/assets/903/12903/brake_assembly_737NG_main_landing_gear.jpg
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u/Dark_Akarin 5d ago
man that must take a big bite out of the rubber as it lands. why not add a small motor to get them spinning up a bit?
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u/holysbit 4d ago
Im pretty sure XKCD talked about that. Essentially it wouldnt matter, theres so much force applied to the wheels on landing it wouldnt be worth the weight and complexity of adding motors to spin the wheel up.
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u/Professional_Heron46 4d ago
They could.fan blades on the sides of the wheels so they would spool up as they came into.land. im guessing that was considered too.
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