Farrell wrote: > Joe explained the "cheek lift" phenomena to me a while back. In general, the strings have their tension running from the rear left corner of the piano to the right front corner. This tension over the years will tend to warp these two corners upward. I found the easiest way to evaluate this condition is to stand back from the piano (perhaps at least 3 meters, maybe as much as 10 meters) and get your eyes on a plane with the top edge of the piano case. Likely best to look toward one of the sides (in this example, we will sight toward the left (pinblock) end). Now line up the closer top case edge with the far top case edge. When the piano was new, presumably you can make one line out of both edges (the lines formed by the two case top edges (actually, all four top edges!) all would lie in the same plane. Presumably after 160 years, as you sight toward the left side of the piano case, the left end (rear end) of the close edge (left side of piano) will be above the left end of the ! > far edge - the two lines formed by the top edges of the case sides will not lie in the same plane, but rather that plane has been twisted. That is what Joe is calling "cheek lift". The case has been twisted. > > Terry Farrell > AHHH... yes... I remember that post when you come to mention it.. Thanks Terry !! I will have a good look tommorrow then....grin.. you guys are great ! RicB -- Richard Brekne RPT, N.P.T.F. Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html
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