![]() On the Schwander design you set the tension by turning a screw. The main complaint about the Herz design is that setting repetition spring tension is much more difficult and time consuming. In the Herz design the repetition lever fulcrum is closer to the middle and the spring clearly has better positioning to lift or suspend the repetition lever during play. ![]() You can get an idea of why it repeats better when you look at where the repetition lever (the angled piece on the top) fulcrum is and the way the spring is attached. Since that time most manufacturers have migrated to the Herz design because it repeats better. The middle one is called the Herz spring design, or commonly the “Steinway” wippen because it was primarily found in Steinways until about 10 or so years ago. ![]() The top one is called a Schwander design and was the most common wippen design until about 10 years ago or so. The top two wippens in the photo represent the most fundamental designs (yes, you nit pickers there are more, but these two are the most common designs in pianos of the last 30 years or so). With some aspects of piano design and construction there is a wealth of variety but not so much anymore with the wippen. ![]() A wippen is the heart and soul of the grand piano action. ![]()
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