Hey Tom,
I like the tube/wire idea.  I've wanted a better way to explain this for
some time now, and that really gets the point across.

And Mark D., you're welcome for bringing this up again.  I know how you love
it so....  :)
tx,
bmc  :)
Ben McCafferty
ben@volkscafe.com

Volks Cafe
1823 Soquel Avenue
Santa Cruz, CA  95062
831-426-1244
http://www.volkscafe.com

> From: Tom Young <tomyoung1@ATTBI.COM>
> Reply-To: Tom Young <tomyoung1@ATTBI.COM>
> Date: Mon, 27 Jan 2003 10:35:36 -0800
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: CV article now available - I'm confused (long)
>
> You are right.  I knew it had to have something to do with the pressures
> being felt by the various faces of the CV joint and my cardboard tube didn't
> do justice to the situation.
>
> Just to be doubly sure, I stuck some stiff wire through the cardboard tubes
> at "C" and "D" and slid my middle fingers into the tube, with the index and
> pinky fingers outside, resting against the wires.  Now my index and pinky
> fingers played the role of the outer hub of the CV joints and the wires
> played the role of the inner hub.  Trying the various orientations again it
> was very clear that the pressures were different only when the axle moved to
> the other side of the transmission, irrespective the 2 joints orientation.
> ---------------------------------------------------------------
> Tom Young                       '81 Vanagon
> Lafayette, CA 94549         '82 Westfalia
> ---------------------------------------------------------------
> ----- Original Message -----
> From: "Ben McCafferty" <ben@volkscafe.com>
> To: "Tom Young" <tomyoung1@attbi.com>; <vanagon@GERRY.VANAGON.COM>
> Sent: Monday, January 27, 2003 9:57 AM
> Subject: Re: CV article now available - I'm confused (long)
>
>
> Hi Tom,
> Thanks for the clarification, this is exactly the feedback I'm looking for.
> You are correct in stating that I didn't intend "rotation of the axle",
> rather, "pressure on the faces of the inner and outer ball hubs".  In other
> words, you're trying to get pressure on the opposite face by moving the
> axles around.
>
> That said, I still stand behind my assertions in the diagrams.  While your
> discussion is close to the mark, it misses one point--where the pressure
> gets applied, not just which direction it's being applied from.  Try it this
> way:  hold your hands in front of you with your fingers pointed towards each
> other, and interlace your fingertips.  Pretend your left hand is an outer
> ball hub, and your right hand is an inner ball hub.  Assume we're talking
> about the inner right rear CV for a moment.  As the tranny applies forward
> force to the outer hub (your left hand), the inner ball hub (your right
> hand) feels that force on the trailing edges.  Now flip your hands over (not
> easy to do!) and assume that your left hand is the outer hub for the inner
> left rear CV.  As forward force is applied to it by the tranny, you will
> quickly see that the force on the inner ball hub is felt on the opposite
> faces, i.e. the other side of your right fingers.  The same holds true for
> both outer joints.  That takes care of the A-B Tranny C-D to D-C Tranny B-A
> scenario.  The A-B Tranny C-D to C-D Tranny A-B scenario can be proven in
> the same manner.