the magic line

[Farrell]

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I don't have a drawing, but words should be pretty darn precise:

There are two magic lines to consider. One runs from the bottom of the =
key at its fulcrum (center rail pin) to the center pin of the wippen =
flange. Ideally (least friction), the point of contact between the =
capstan and the wippen heel cushion will lie along this line at half =
key-stroke. The other magic line runs from the wippen flange center pin =
to the hammer shank flange center pin. It is most efficient if the =
contact point between the jack and knuckle lie along this line at half =
key-stroke.

Terry Farrell

  Does anybody have a picture or drawing showing the "magic line" in the =
action, going from the capstan, I think?

  Andre Oorebeek told me about that yesterday but I would really like to =
see a drawing of it.

  Thank you,

  Quentin Codevelle
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