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<DIV><FONT face=Calibri>I too agree with Matthew, also to answer Davids
query..</FONT></DIV>
<DIV><FONT face=Calibri>I seem to remember E&S experimenting with the idea
of getting zero percussion at the pivot end, late 90's
early 2000's. This was looked into after in one case a ring of six
were rehung by them and had terrible clapper knock. All you could hear from
inside of the church was a knocking sound. I think they installed atleast
one of their new design clappers there, not sure how successful it was
though.</FONT></DIV>
<DIV><FONT face=Calibri></FONT> </DIV>
<DIV><FONT face=Calibri>Mitch</FONT></DIV>
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<DIV style="font-color: black"><B>From:</B> <A
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<DIV><B>Sent:</B> Saturday, July 31, 2010 7:49 AM</DIV>
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<DIV><B>Subject:</B> Re: [Bell Historians] Clappers</DIV></DIV></DIV>
<DIV><BR></DIV><SPAN style="DISPLAY: none"> </SPAN>
<DIV id=ygrp-text>
<P>Matthew's right, the flight is very important.<BR><BR>I also think I'ts due
to nodes and anti nodes of vibration along the length <BR>of a clapper. The
material, as we all know, is very important. How many <BR>times have we heard
about the differences between wrought iron and SG?<BR><BR>The clapper pivot
needs to be at a node (null) otherwise it will put the <BR>staple under too much
force and break it, which when it was a small piece of <BR>wrought iron cast
into the bell was important.<BR><BR>The mass of the ball means that it is
unlikely to vibrate much when struck, <BR>so this too should be considered as a
node.<BR><BR>The flight therefore could be considered to "tune" the clapper such
that the <BR>pivot is as close to an node as possible.<BR><BR>I can imagine
blacksmiths of old reshaping the flight in the forge until <BR>they felt minimim
shock at the pivot when hitting the other end.<BR><BR>Only wrought iron can be
"tuned" in the forge. SG shafts can be turned down <BR>on a lathe, but has
anybody ever thought of "tuning" them for a node at the
<BR>pivot?<BR><BR>David<BR><BR>----- Original Message ----- <BR>From: <<A
href="mailto:matthewhigby%40aol.com">matthewhigby@R70b6U7BaVCV9YO2BNbBmUnM546gql5Zazt55aO0rQCSrrapfU2tQX9fUDnJjlzzfNaKL2nBLlDcTZnB.yahoo.invalid</A>><BR>To: <<A
href="mailto:bellhistorians%40yahoogroups.com">bellhistorians@yahoogroups.com</A>><BR>Sent:
Friday, July 30, 2010 11:33 PM<BR>Subject: Re: [Bell Historians]
Clappers<BR><BR>The flight has various functions. Briefly I will try and
describe them!<BR><BR>Firstly - have you ever played Cricket? Try hitting the
ball with the top or <BR>bottom of the bat - the ball doesn't go too far and it
hurts your wrists. If <BR>you hit it with the middle of the bat (optimum strike
point) the ball goes a <BR>long way, without hurting. The same principal works
with a clapper.<BR><BR>1) The flight reduces stress on the clapper pivot.<BR>2)
The flight balances the clapper, to give an optimum strike point (similar
<BR>weight either side of the ball).<BR>3) The flight makes the clapper into a
longer pendulum, gives more wind <BR>resistance etc, to slow the clapper down.
Clappers with short flights swing <BR>quicker, making the the bell harder to get
up with the clapper "right side" <BR>(particularly when combined with a heavy
headstock).<BR><BR>Hope this helps,<BR><BR>Matthew<BR><BR>What is the purpose of
the flite (or is it flight) on a clapper? Does it <BR>have an aerodynamic
function or is it a vestige of former use as the point <BR>at which to attach a
rope for chiming ?<BR>Peter Trent<BR><BR>-----Original Message-----<BR>From:
Peter Trent <<A
href="mailto:peter.trent%40btinternet.com">peter.trent@8OWV4iqU8c9apHFGG5eS4xkszL-FgkoZmnRXSjRPg66KXMdQxrDFOyBJO7XaiDiKW0TCxLZEWrp0GMdzOgYfiFAz.yahoo.invalid</A>><BR>To:
<A
href="mailto:bellhistorians%40yahoogroups.com">bellhistorians@yahoogroups.com</A><BR>Sent:
Fri, Jul 30, 2010 11:00 pm<BR>Subject: [Bell Historians] Clappers<BR><BR>What is
the purpose of the flite (or is it flight) on a clapper? Does it <BR>have an
aerodynamic function or is it a vestige of former use as the point <BR>at which
to attach a rope for chiming ?<BR>Peter Trent<BR><BR></P></DIV><!-- end group email --></BODY></HTML>