Resonance question

Dec 11, 2019,09:36 AM
 

I was discussing this delightful model with someone the other day, and the question came up:  does the "resonance" feature actually function as advertised?  The underlying hypothesis is that the two balance wheels interact with each other (even though they are not physically connected) and that this interaction makes each movement more consistent and accurate than it would otherwise be in the absence of the other movement.  Has anyone ever conducted a well-designed experiment to test that hypothesis?  


Don't get me wrong:  this watch is wonderful whether or not the hypothesis is correct.  I'm just wondering whether it's been objectively tested.  Thanks!


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It has been discussed and tested over.

 
 By: ChristianDK : December 11th, 2019-10:17
It has been discussed extensively over the years. In the very early days some armchair discussions had people claiming it didn’t work. However, if you own the watch you know if it works! (when it works) The movement is in fact two movements that run compl... 

Good to hear your personal experience with this awesome watch.

 
 By: Spangles - Dr. Tabby : December 11th, 2019-10:34
If you cycle on cobblestones and the watch is jolted a bit out of phase, does the resonance reassert itself in time? Obviously, there are limits, but in normal daily use with bumpy bike rides, did you find it corrects or does it require a winding down and... 

Yes it will automatically fall back in to tact ..

 
 By: ChristianDK : December 11th, 2019-10:42
...But the seconds hands will,(of course) remain misaligned by a second or two. So I simply pull the the sync button and both sec hands are pulled back to their 0/60 positions. And I go on wearing it. This is not something that happens often BTW.

Ah, perfect! [nt]

 
 By: Spangles - Dr. Tabby : December 11th, 2019-10:44

Very helpful ...

 
 By: Chromatic Fugue : December 11th, 2019-12:36
... do you happen to know the medium of “communication” between the two balance wheels? In a piano or guitar, one vibrating string will cause another string to vibrate; the medium there is sound waves (fluctuations in air pressure). Do you think that’s th... 

This has been discussed many times over the years

 
 By: cmmnsens : December 11th, 2019-12:52
Here's an article by Jack Forster explaining the FPJ Resonance www.revolution.watch

Thank you

 
 By: Chromatic Fugue : December 11th, 2019-12:59
Jack at his finest: “I am as sure as I have ever been of anything that Mr. Journe knew of Breguet’s notes perfectly well but every instance I know of of persons asking him how the Chronomètre à Résonance actually works has been met with, essentially, a ra... 

I don’t have much to add to Mr Forsters excellent article.

 
 By: ChristianDK : December 11th, 2019-13:38
It sums up the discussions I remember of “working / not possible” back in the primeval soup of watch forums. It also explains better than other articles I have seen, the underlying principles. My personal perspective is that of experiencing the watch and ... 

Glad you remembered this article ...

 
 By: ChristianDK : December 11th, 2019-13:44
I had forgotten about. It is very good and giving a Proper explanation of how it works.

Sympathique resonance

 
 By: Timewarp : December 11th, 2019-10:21
It’s called sympathetic resonance. When 2 pendulums are side-by-side And one is in occilation the second one in a few seconds of the first one swinging will swing at the same frequency. They have to be in close proximity of each other. This is called symp...