Recall physics class? Sitting on a freely rotating stool holding a bicycle wheel? That wheel is free-wheeling but the right-hand rule is used to predict motion (or lack of motion). The constant drive force you allude to is not required, merely a rotation is.
For sure,just about every object on the planet experiences some sort of energy,but in this scenario,what does it matter? The whole wheel is rotating mass,but both rotors spin at the same rate. If one rotor has more braking force applied to it than the other rotor,the rider is not going to feel it. Both rotors are attached to the same wheel. If one caliper fails completely,lets say the left...on full braking the bike wont be thrown down or even move noticeably different to the right. Bikes with say only a right side front brake,dont pull to the right upon braking. A car with one failed brake can be felt,the componants do not share the same wheel(rotating mass).
Also, the motorcycle wheel in fact is being twisted on its axis perpetually by the force of friction from the road.
Yes,the force of the friction between road and tire is there,the tire is being driven by force,but the force is constant. Unlike the rear wheel which is being driven by a motor. The front "free-wheels" the rear is being driven. Ex: If you crack the throttle,you can spin the rear,the speed of the front wheel remains the same as the bike.
We cannot feel the effects yes because the whole assembly is stationary. However, Frank's observation, both the wear differences and temperature variations that create them, are the measurement of whatever the cause is, whether the torque forces that I theorize or the actual, correct cause LOL.
Take a Busa with OEM rubber lines. Hydraulic force travels down the hose to the first caliper as the hose expands,a certain amount of force is applied to the first rotor,then the second caliper receives less force because the hose is longer and expands a second time.I believe thou that the difference in pressure is miniscule,probably close to unmeasureable.
A good way to illustrate and test my theory would be to set up 1 hydraulic pump with 3 hoses attached to it,all of the same material.1 line a foot long,the 2nd 2 feet,the 3rd 3 feet long. What would the percentage of force difference be? next to nothing is my guess.
I have seen both, completely opposing opinions here: succinctly different feel and no different feel whatsoever. Someday with a brake line changeover, I suppose I will have to decide for myself.
It will be evident immediately before you even test ride it. The brake lever will have lost some of its "squish" or "mushy" feeling,will have far less travel and will actually brake FASTER. The time and distance travelled from say 100MPH-0 will be huge.
@Berlin Germany do you see differences in wear on completely different bike models I presume? Otherwise we could chalk it up to a geometry problem, right?
its not geometree,thats the study of rectumtangles an' such...this is physics.
Actually in this case it's the study of many things foremost being hydrodynamics.
Have a good day HW...
Rubb.
