Ornatus-Mundi
[Zenith]
7136
4 escapements, 5 differentials, and 16Hz total frequency!
The equalising properties of the four escapements need dedicated mechanisms to come into effect. In this case, differentials!
Roger Dubuis had already made headlines in 2005 by introducing a double flying tourbillon with a differential. This extraordinary technical expertise laid the foundations of the seven-year research programme required to produce the Excalibur Quatuor watch. It is a watchmaking masterpiece that not only integrates four sprung balances and an original power-reserve display, but includes no fewer than five differentials.
Take a closer look at the gears between the balances:
The equalise the relative 'speed' of the two adjacent escapements. This means we have two differentials already. A third one can be seen on the back which serves the equalisation of the two escapement pairs:
It is important to note that the escapements work independently. This means that while each balance vibrates four times per second (4 Hz=28.800 bph), the frequency of the watch is multiplied by four as the balances do not oscillate simultaneously, resulting in an effective frequency of 16 Hz or 115.200 bph!
The fifth and last one connects the rewinding stem and the two parallel barrels.
Thus, in summary we have:
Now 16 Hz - there must be something sensual with it - and it is!
This message has been edited by Ornatus-Mundi on 2013-01-19 23:58:21
The equalise the relative 'speed' of the two adjacent escapements. This means we have two differentials already. A third one can be seen on the back which serves the equalisation of the two escapement pairs:
It is important to note that the escapements work independently. This means that while each balance vibrates four times per second (4 Hz=28.800 bph), the frequency of the watch is multiplied by four as the balances do not oscillate simultaneously, resulting in an effective frequency of 16 Hz or 115.200 bph!
Note to myself: I have to check back on this. This is news to me and I really would love to understand more about the equalisation as well as the addition of individual frequencies!
The fourth differential is associated with the power reserve mechanism. This one is extremely precise. While a double display showing the crescent of the moon turns at the same speed as the barrels - 4.25 revolutions per day - the needle also turns, but more slowly. As the power reserve reduces, the hand follows the barrels’ rate of discharge, positioning itself precisely on the two moon crescents to indicate the power still in reserve.
The fifth and last one connects the rewinding stem and the two parallel barrels.
Thus, in summary we have:
4 escapements
5 differentials
- 2 for two escapement pairs
- 1 to coordinate the two escapement pairs
- 1 in the power reserve
- 1 in the winding system
Effective frequency of 16 Hz. Violà:
Now 16 Hz - there must be something sensual with it - and it is!
SIHH 2013: Roger Dubuis - a true chronometric marvel [Live Pics!]
Manufacture Roger Dubuis today lifted the veil on a truly remarkable new watch called the Roger Dubuis Excalibur Quatuor : In short, the watch concentrates on the key tasks of a watch, that is to keep time as precise and as consistent as possible. To this...
An exploit of an self-sufficient, vertically integrated manufacture...
The impressive movement, featuring several innovations which have not been realised so far, was only possible because of the considerable technical capabilities of the manufacture. Today, Roger Dubuis not only manufactures movement plates, or pinions, whe...
Four INDEPENDENT escapements...
... work in pairs to compensate immediately for the rate variations caused by the changes in position. What the tourbillon achieves over the course of a minute, the Excalibur Quatuor achieves instantly. They leave their traces on the back as well: I shall...
An impressive halo piece! Overkill done right.
Finally, a complication as outlandish and impressive as the watch's case! Sure, the concept screams "overkill", but the path taken (four escapements with five(!) differentials) is quite a bit more interesting than the norm - multiple tourbillons. The watc...
I wonder....
Noticing that Greubey-Fosey have a double-inclined balance this year, I wonder if there was some joint research between the 2. A ps to ei8htohms, theirs is freesprung
The escapements are mounted in a 45° angle for real-time gravity compensation
This is essential to fulfill the watch's overall objective, i.e. to allow gravity the least possible influence on timekeeping. As a result, at any given time there are two escapements on which gravity has exactly opposite influence. Thus, the watch achiev...
4 escapements, 5 differentials, and 16Hz total frequency!
The equalising properties of the four escapements need dedicated mechanisms to come into effect. In this case, differentials ! Roger Dubuis had already made headlines in 2005 by introducing a double flying tourbillon with a differential . This extraordina...
I'm trying to wrap . . .
. . . my decidedly nontechnical brain around the claimed resonant frequency, Magnus. The four escapements would have to be connected in series to effect the claimed 16 Hz resonance. This seems unlikely to my admittedly limited understanding. A parallel co...
There is NO resonance!!!
as this would as I understand defy the intended effect (and also require that the resonating escapements would be (1) linked appropriately to allow resonance and (2) beat simultaneously which would yield a summary frequency of 4Hz in this case). Thus, the...
4 escapements, 16 Hz - this SOUNDS GOOD!
When I saw the watch first I immediately thought WOW- this one really lives! As the four escapements beat asynchronously the sound is a very special one, unusual for a watch where one is used to the regular tick-tack. This one definitely has character (tu...
Additional live pics and wristshots...
For what it is, the design of the Quatuor is actually quite restrained. As the escapement require some vertical breathing space there was little choice than to open the dial (if you want to keep the watch reasonably 'thin'): Bold applications at 12, 3, 6,...
Super presentation!!!
And a really bold watch! Work of art, even if horlogically speaking, the use of those 4 escapments can be debatable. Still a pleasure to look at. Thanks for the great report!
Fabulous! the watch and the series of posts
i notice a very classy arrangement of lugs and strap while marveling at the color - a steampunk-like coppery gold. I love it! Cazalea
Agreed! Great Presentation!
I really like the look this watch and the movement seems to be genius! Love it!
Thanks much for the sharing. But
is there a need to go thro such extent to keep time as accurate & consistent? Looks a tad overkill for me. But I'm just a layman ;p Melvin
My faith has been restored!
Wow, just wow! What an amazing piece--- my faith in RD has just been restored. The silicon model is incredible looking---thanks for the review-- I have just seen my new grail watch---hopefully, one day, RD makes more than 3 examples of the silicon version...
Incredible
I would hate to be the watchmaker that services that watch, however. It looks like an adjuster's worst nightmare! Every hairspring would have to be perfectly flat and true. Literally 4 watches in one- all requiring a perfect service. Yikes. In principle, ...
$375k and one million
Word is the price is $375k in gold and US $1 million in silicon
I am trying to understand how it works, and have to say that I will wait for your
In Depth review, for that. So, four balance wheels working in pair are better than a Tourbillon, even a Gyro one ala GF, GP or JLC? Are their some measures to demonstrate it? I am intrigued by this beast, which is one of the few which captivated my attent...
