Re: [Harp-L] ...Why do reeds go out?

[Timothy Kane <hawkeyekane@xxxxxxxxx>]

Or between Federation Space and the Klingon Empire...just depending on the timeframe you happen to be watching in the Trek universe. 

Wow...just gave myself away as not only a harp addict, but a trekkie as well. Damn and blast....

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From: David Payne <dave@xxxxxxxxxxxxxxxxxxxxxx>; 
To: Harp L Harp L <harp-l@xxxxxxxxxx>; 
Subject: Re: [Harp-L] ...Why do reeds go out? 
Sent: Sun, May 20, 2012 2:46:49 AM 

You got it, Robert! Once the reed swings past the neutral zone (between Federation Space and the Romulan Empire), it flops stresses.
So, the side once under compression is now under tension stress. It goes back through the slot again and and now its under compression stress again.  There is a theoretical point inside the reed that is under no compression or tension stress whatsoever.
 
David Payne
www.elkriverharmonicas.com

Elk River Harmonicas Forum now available via Iphone app, www.elkriverharmonicas.com/forum

________________________________
From: Robert Hale <robert@xxxxxxxxxxxxxx>
To: David Payne <dave@xxxxxxxxxxxxxxxxxxxxxx> 
Cc: Harp L Harp L <harp-l@xxxxxxxxxx> 
Sent: Saturday, May 19, 2012 10:15 PM
Subject: Re: [Harp-L] ...Why do reeds go out?

On Sat, May 19, 2012 at 3:38 PM, David Payne <dave@xxxxxxxxxxxxxxxxxxxxxx> wrote:

When the reed swings one way, it is under tension force. When it swings the other way, it is under compression force. 

...seems like tension and compression would both be active at the same time on alternate sides of the same reed. 

During both the up and down flaps of the reed, one side is compressing while the other side is under tension. 

As the reed passes the neutral middle, the effects are reversed, and the reed swings to the other side of the plate.

How'm I doin'?  

Robert Hale
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