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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Understanding....midvalves...
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[QUOTE="drehwurm, post: 24677, member: 20888"] Servus Jer, Probably it is too little background knowledge what is holding me back here, but I didn't come to another conclusion. If you have a chamber filled with fluid which has two exits the pressure on either of the exits will be the same regardless what you do. Even if you raise the pressure behind one of the exits (i.e. oil displaced by the rod) absolute pressure will stay equal on both exits. The above example is static and again I don't know very much about fluid dynamics, but even with the exits being spring loaded doors and one exit moving I don't see a difference in pressure or, and that's my point, flow on both of the doors. Now if the doors are build different, flow would be different BUT overall pressure would still be the same. Ok, I want to say that IMHO passive and active valving is just a term describing a technical solution (valve moving or oil moving relative to cartrige), but with no functional difference! Nevertheless, this leads me to a much more interesting fact - terminology. Is it really right to talk about speeds (shaft speed) here? Wouldn't this mean we want to set the valaving for a certain speed, which I consider wrong. If your fork is bottoming at a certain obstacle and you measure a speed of 8m/sec what does this mean - nothing relevant. 8m/sec is just the max. speed, important is the acceleration, because this finally tells you the load on the valving. Where is the point? Well a high acceleration over a short period (sharp edge) of time results in the same 'max. speed' as a low acceleration over a long period (g-out)! I think, I for myself have a better understanding on this if I visualize it as low, mid and high acceleration vs. speed. Michael [/QUOTE]
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Understanding....midvalves...
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