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RE: Church bells

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Alex,

1.  You will have to play around with this issue.  Add temporary counter
weights that can be added or removed.  Once the correct weight is
determined, make the weight permanent out of whatever material is
appropriate.

2.  Get a metallurgist involved and use brazing (an older "welding method").
A good metallurgist can develop the appropriate fill metal rods.  The parent
metal is heated and additional matching fill metal is melted and added as
required.  

Regards,
Harold Sprague, P.E.
The Neenan Company
harold.sprague(--nospam--at)neenan.com


-----Original Message-----
From: Alex C. Nacionales [mailto:anacio(--nospam--at)skyinet.net]
Sent: Wednesday, January 27, 1999 1:41 PM
To: seaint(--nospam--at)seaint.org
Subject: Church bells



I am reconstructing several bells in old church  here. The bells
are about 1000 lbs. The bells have bullet holes about 1
inch in diameter and the concrete counterweights were destroyed.

Problem

1. How heavy should the counterweights be so that the bells will stay
upright when at rest and swing 45 deg. on each side with a minimum push.

2. How to repair the holes to improve the bell tones. The bell metal is a 
mixture of copper and tin. I am planning of welding it using 
electrodes with matching base metal.

I will appreciate any help from you.

Alex C. Nacionales, C.E.
Iloilo City, Philippines