Viscous LSD, what the heck are they talking about

[ciper]

I cant seem to understand something in a recent nasioc thread
http://forums.nasioc.com/forums/showthr ... did=523781

Basically the person is saying if the plates are smooth that more torque transfer will occure as apposed to plates with holes.

The plates arent in direct contact (normally) and my brain wont accept that two smooth plates create more friction against a fluid than two hole filled plates.

Please post your replies here, we all know how crappy nasioc can become when someone challenges an idea.

[entirelyturbo]

and my brain wont accept that two smooth plates create more friction against a fluid than two hole filled plates.

Uhhh, doesn't a torque convertor function under the premise of two "hole-filled plates" creating friction against fluid?

[evolutionmovement]

The greatest surface area would be more like a washboard or wavy surface solid disc. The actual surface area of the discs would be less with the material removed for the holes. I bet the slotted pieces move because of the interaction of shearing fluid between the plates and through the holes in the plates. As the plates spin, the fluid would resist the speed differential between the plates but the variance in friction as the slots and holes pass could create varying pressure aones that would move the slotted outer tabs in or out as they would not have the strength to resist. Or maybe the less fluid, the greater the shear force and so the intermingling of the fluid between the holes in the plates would reduce this shearing effect by allowing an exchange and even intermittent periods of greater fluid volume. Dammit! I know what I mean to say, but I don't think I'm getting it out right!

Ferguson Formula developed early 4wd production car systems - the Jensen Interceptor FF and some prototype Mustangs for example. Just wanted to be a geek.

I don't know why that guy kept driving that poor car wit the rear end doing that. No mechanical sympathy - they should make him drive Korean.

Steve

[ciper]

I still dont understand how a solid plate would be better.

In my mind you would need a balance between surface area and the slotted portion. A similar shape to a slotted rotor is my idea.

[evolutionmovement]

I would agree if the slots weren't through-holes, although I'm just guessing either way.

Steve