harper;1170989 wrote:
kington99 specified -reverse- torque. The CV hub is probably designed so
that the frictional force is increased with forward torque (like a
rotating lock down) and decreased with reverse torque. Hence, you can
stand on the pedals and it won't slip and you can reverse the direction
and get it to slip by hand.

Sturmey Archer and some other free-wheeling geared hubs have a
directional design, also. Their gear teeth are more like ratchets and
will easily lock in the forward direction but slip in the reverse
direction.



indeedy, as far as i understand the hub works by the properties of a
non-newtonian fluid, it effectively goes solid when trapped between the
ball and the cone. Presumable when running in reverse the fluid isn't
subjected to suitable pressures to cause this effect, allowing it to
slip. Haven't tried this myself but it is the accepted wisdom of other
car racers who use them, it;s significant as it throws out the
possibility of regen braking


--
kington99

Dave

- what a thoroughly post-modern subversion of the cycling genre -
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