[CAUT] Moving wippen rail

[Richard Brekne]

I think... that if you pull the whippen out a bit... then a couple 
things are changing that are not mentioned here.  Or at least the only 
one in the ball park has been pointing at the jack center.

If you leave the jack unadjusted after the move... then of course its 
going to be well back of  its origional point... and no one would 
question that that essentially puts the knuckle farther out on the 
shank.  But we DO realign the jack... but in doing so we change its 
angle.  Thats going to change the force vector down to the actual point 
on the whippen thats supporting the load... namely the spot where the 
jack is connected to the whippen.

The whippen is a bit of a complicated lever really... because tho its 
easy conceptually to think of the cushion / flange center / and jack top 
as our three points of interest in figureing its leverage... one 
actually needs to take into consideration the jacks angle to the jack 
center... and its length from the flange center into consideration if 
one wants to get real precise.  Not only that.. but you have to get into 
the starting angle and ending angle of the whippen as a whole.  Overs 
makes a big point of that on his site.

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. 

In anycase.. the whole whippen spread discussion is more a matter of 
keeping the jack at a proper angle to the hammer shank when the action 
is at rest and properly regulated.  For a given blow distance... there 
isnt much room for repositioning the whippen in the first place.  
Otherwise you will create friction problems at the jack / knuckle.

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