Here's is an off-the-wall theory
:
From science, you learn that everything has what is called a "natural frequency". The natural or resonant frequency of an object is the frequency at which the object will easily vibrate.
Soldiers are taught to march across a bridge out-of-step, so they won't create vibrations that tap into the bridge's natural frequency. In extreme cases, the vibrations can cause a bridge to collapse, as happened when the driving force of the wind caused the collapse of the Tacoma Narrows Bridge in Washington State in 1940.
I was wondering if that is what is happening to our cars. That is, they reach a certain speed where the rotation of the front tires, disk brakes, rims, axles, etc. get to a certain vibration which is amplified by the "natural frequency" phenomenon.
Just a thought...
