A geometry question : I wonder what happen to the magic line on instruments with a trapezoidal keyboard, as S&S mod D. Seems to me that the bass side of the whippen axe may be lower if we want to stay consistent with the magic line. I've seen a larger spread on the bass side on some instruments (shimmed flanges), that may go in that direction too. I've noticed too higher key height on the bass side (more cardboard punching under the front too) a correction for too heavy basses problem. Makes sense to me that the shorter length of the segment in the treble , assuming the whippen heel is at the same place all along the action, mean that the whippen axe may change height to respect the optimum alignment. Do some have some thoughts about that ? It is possibly an undocumented and unofficial way to have the tubular frame in a slant (not twisted , but different height ). My friend Stephen Paulello used a whippen heel that can be height adjusted to compensate for that in his grand piano, you should see the evenness of the hammer rise all along the instrument ! Best Isaac OLEG Entretien et réparation de pianos. PianoTech 17 rue de Choisy 94400 VITRY sur SEINE FRANCE tel : 033 01 47 18 06 98 fax : 033 01 47 18 06 90 cell: 06 60 42 58 77
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