All the more reason to make the key bed strong enough to roll the piano over using the lyre. ----rm ----- Original Message ----- From: <A440A@aol.com> To: <pianotech@ptg.org> Sent: Monday, May 26, 2003 8:48 AM Subject: Re: No Power Yamaha revisited > Bill writes: > >I agree that a good healthy blow will put the frame under pressure, > >but if the BR doesn't have anywhere to go (because the glides are > >contacting the bed), > > I have been wondering when somebody is going to mention the entrainment of > the keybed? Once the glides are in contact, the action cannot move, UNLESS > the keybed is not absolutely rigid. But we know the keybed isn't. This is > easily seen by depressing the pedals under a very lightly bedded set of glides and > observing them to lose contact with the keybed. > So, the extra power and tone being ascribed to heavier loading on the > glide buttons may possibly be a function of preload on the keybed? And the > observed differences between makes of pianos may be more due to the differences > between keybed strength than the flexibility of the balance rails?? > Wondering, > Ed Foote RPT
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