[pianotech] The much maligned Use of Lyre

David Stocker firtreepiano at hotmail.com
Wed Feb 24 14:56:28 MST 2010


  
>As far as lyre damage from tilting, isn't it possible that the effects 
>aren't noticed while the movers are still folding their blankets?  
>Couldn't the joint be weakened or broken, and then work looser 
>under play?  I sure find lots of loose lyres; something causes it.

Some loosening will come from wood grain running in opposite directions in all the main joints. Such glue joints are destined to loosen and fail. Woodworking 101.


David Stocker, RPT
Tumwater, WA



From: Cy Shuster 
Sent: Tuesday, February 23, 2010 20:10
To: pianotech at ptg.org 
Subject: Re: [pianotech] The much maligned Use of Lyre


I heartily applaud piano movers who know what they're doing, use the right tools, and do it well.


I think most of the problems I see are simple housekeeping errors: putting the wrong bolts back in the leg holes, putting pedal rods in upside down, losing the lyre braces (there's gotta be a warehouse full of 'em somewhere!).



If the lyre needs fore-and-aft diagonal braces to resist the modest horizontal vector of a foot pressing a pedal down, wouldn't it need a lot more structure side-to-side if it were *designed* to be used as a fulcrum?  Look at the side-to-side bracing of the tail leg, for example....


--Cy--


Cy Shuster, RPT
Albuquerque, NM
www.shusterpiano.com
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