When a wheel off occurrs...

Discussion in 'Trucking Accidents' started by camionneur, Feb 5, 2016.

  1. skellr

    skellr Road Train Member

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    Unfortunately no. I've seen it happen a few times and seen quite a few wobbly hubs not far from coming apart.
     
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  2. MooneyBravo

    MooneyBravo Heavy Load Member

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    I'm a road scholar. Let me help you.

    When a wheel is rolling (and not skidding) it has a certain angular velocity and translational velocity such that the translational velocity is equal to the angular velocity multiplied by the radius.

    When a wheel is under the weight of a car it is compressed a fair amount. If it pops free, the radius will increase. But then the velocity will no longer be equal to the angular velocity multiplied by the radius and a frictional force will act forward on the wheel. This force increases velocity and decreases angular velocity, such that the wheel will be rotating slower yet be moving forward faster.

    Momentum is conserved because the frictional force acts backwards on the ground. The wheel doesn't gain any energy as the decrease in angular velocity causes a greater loss in energy than any energy gained by the increase in translational velocity.

    Does that help????? hahahaha
     
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  3. mjd4277

    mjd4277 Road Train Member

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    Possible reduction in weight/under load. Wheel could've came loose due to seized/defective wheel bearings,wheel lugs not torqued correctly,etc.
     
  4. camionneur

    camionneur Road Train Member

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  5. camionneur

    camionneur Road Train Member

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    Looks like a truck tire won the ski jump contest too. :Wheel:
     
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  6. Infosaur

    Infosaur Road Train Member

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    Nothing says saftey like side swiping a 30 year old car that pre-dates side impact standards. Next, we'll measure braking distance using this totally relevant 68 Plymouth!
     
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  7. camionneur

    camionneur Road Train Member

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    Could hit a motorcycle, pedestrian, etc. There really are no impact standards for truck vs whatever, just preventing the accident.
     
  8. camionneur

    camionneur Road Train Member

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    Also, a trooper says that trucks lose tires frequently... or the reporter said this to sensationalize it (and of course it hit the door of a car just like in the what if scenario).
     
  9. camionneur

    camionneur Road Train Member

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    Just don't call the fire dept.
    [​IMG]
     
  10. lovesthedrive

    lovesthedrive R.I.P.

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    LOL whomever tightened the wheels last is in real trouble!