FAN (was: clothing)

[Farrell]

Yes......, if the piano interior is not at equilibrium with the surrounding atmosphere. If it is, not big deal.

Terry Farrell
  
----- Original Message ----- 
From: "Tony Caught" <caute@optusnet.com.au>
To: <pianotech@ptg.org>
Sent: Sunday, June 23, 2002 9:41 PM
Subject: Re: FAN (was: clothing)


> Hi All,
> 
> Fans of any type should be switched off when a piano is open. Particularly
> upright pianos.
> You all seem to be concentrating on the sound problem with the echo of the
> blades of ceiling fans but there is more to it than that.
> Maybe because I'm in the tropics I notice it more but if you leave the fan
> on whilst tuning, then check over what you did 20 minutes ago, you will find
> that this is not where you set it.
> If a fan is on it is on to cool humans down (generally) it does this by
> causing the sweat on you skin to evaporate. Not so with timber. You are
> generally forcing either moister or dryer air through the action and onto
> the soundboard.
> The piano under these circumstances then reacts in a very short space of
> time to effect the regulation and tuning as the timber and felts expand or
> contract.
> I know, the temptation to turn a small fast fan on is high (and have at
> times been guilty) but the result is always the same.  Two weeks later when
> the piano has restabilised, it will be not as you left it.
> 
> Regards,
> 
> Tony Caught
> Darwin
> Australia
> caute@optusnet.com.au
> 
> 
> 
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