<HTML>In a message dated 5/3/2002 8:06:28 AM Pacific Standard Time, A440A@AOL.COM writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Re: Crown, was RE:Curve on Bridge Bottom Date:5/3/2002 8:06:28 AM Pacific Standard Time From:<A HREF="mailto:A440A@AOL.COM">A440A@AOL.COM</A> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet             Ed</BLOCKQUOTE>   I've seen demonstrations of this where a 1/8" thick by 1' wide and 30 " long placed between end supports on a long plank. It was fit so it just slipped in then a business card was slipped in between one of the ends and the stick bowed right up quite a bit.     I understand your skeptical question. Tomorrow I'll take  the same long rib and make the same kind of jig/fixture and play with and see about the resistence I'll post Mon. or so with the observation. O.K.   I'm curious too.     >.Still looking for an original thought>>>>>>Dale>>>>>>>> <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> Dale writes: >  I toook a long >rib (60 ft. radiused) unattached to any thing and simply bent it down flat >as  an experiment. Imperceptable change in length to the eye. > No more argument from this casual observer> Hmm,  what about the difference in resistance to bending it flat when both ends are captured as opposed to lying there free on the bench?  Wondering, Ed Foote </BLOCKQUOTE> </HTML>