im thinking of it this way...lets say the rollers were like the conveyor belt. you push the car...the car will not move the conveyor belt, it will move on the conveyor belt.

...same with the rollers...you arent making the rollers spin...ur making the object on the rollers move.


:dunno:


my head hurts. h:

 

doesn't matter who pushes the car you push hard enough, it will come off the rollers.

 

i think you are correct but i see where dubby can get confused at 1st i thought it was like he said but now after what u said above i was like :eek3:

 

i've pushed enough cars off a smog roller setup and 8 roller 4wd dynos to be semi-confident of my answer but whatever dubcac could be right in a way too

 

there is a reason why the car is strapped down to the dyno, it could jump off at any time. now pushing it just helps it jump off.


and for shits and giggles
http://www.youtube.com/watch?v=fszK8-rEWOQ

 

i see this as a simple as an object on rollers. like the kind factories use to move stuff around in assembly lines. yes the smog dyno rollers are not level so it would require more force but the car would move off the rollers.

because in order for the roller to keep the car in it's place (not roll off) the wheel have to be the one creating the force (ie rotating under the engines power). however when an outside force acts upon the car as a whole, the car rolls off the rollers. just like in my example above the rollers on an assembly line turn but the box on the rollers move off the rollers they were on before you pushed the box.

this is a similar if not the same idea/principle as the airplane on a conveyor belt one.

 

you have to take into account also how heavy the rollers are, and how much friction they apply. We at school on our AWD dyno have pushed cars off the dyno with ease...so how is that any different than pushing it forward?

 

edit

deleted irrelevant youtube vid..it was a 2 roller 4wd dyno

 

its like pushing a car over a speed bump. A good shove would easily do it.

 

yes it will.

:closed: