[CAUT] Moving wippen rail

[Keith Roberts]

The reason I disagree with the premise below is simple. We are looking at
the wippen as a separate unit but we measure the change in output of the
wippen as a function of the the entire action. Yes, the wippen power will
increase as the jack approaches the line tangent to the RA but you are
losing power at the other end as the force vector there diverges away from
the tangent line of the shank EA. Therefore the change in jack position has
absolutly NO effect on the resulant force. <GRIN> of course it has some but
as you will see it doesn't change proportionally to the output of the
system but changing the ratio of the wippen EA certainly does and is fairly
accurately reflected by the drop in DW.
Friction, HA! measure the friction and tell me there is a change.

Keith




>
>
> So... really  I have to go with Jon here.  The change in apparent
> leverage is because of vector alignment. One also will experience a
> change in friction.
>
> Cheers
> RicB
>
>    I shimmed a rail out today and yes, the UW & DW dropped. I don't
>    attribute it to
>    improving wippen ratio but vector alignment.  If I kept moving the
>    rail back
>    I'm sure the numbers would degrade.
>    --
>
>    Regards,
>
>    Jon Page
>
>    LET'S GO RED SOX
>
>
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