41northpole
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Hi Magnus
Do you think the Nano fouydroyante makes any difference here. Surely leaving the 1/8 seconds off completely would use even less energy. The main hands are still I assume (!) driven by gears as normal.
I am also guessing for the 180 day PR that virtually all the rest of the watch is mainspring?
A brilliant way of creating the 1/8th jumping second though. The bearing surfaces for the drive rod for this hand must be pretty clever as well to prevent either binding or play with such a small delivered force
Regards
Tim
BREAKING: Greubel Forsey announces Mechanical Nano – Episode 2: the first Nano Foudroyante EWT: 1800x less energy, 96% less space (video)!
Since more than one decade, Greubel Forsey is investing in research aimed at developing a mechanical watch movement with 180 days of power reserve. For this aim, the brand set up the EWT (Experimental Watch Technology) Laboratory and implemented the Mecha...
Gruebel Forsey EWT Lab
The GF EWT Lab announced their Mechanical Nano project a while ago and awaked many questions. As we see in their Episode 2 documents the advantages are those we expected, reduction of weight and thus inertia and friction. It would be more interesting to s...
Hi Don
in these pictures the additional drive wheel and conical gear look like plastic, but I very much doubt they are. Guessing LIGA style build with clear silicon, or maybe even glass?? Tim
Thank you Magnus for all these explanations (even if I’m a little bit lost sometimes to be honest with you 😊)
Between the Zenith Defy Lab and the GF Nano concepts, we really enter in a new horology era. But, beyond technology and more specifically in the case of GF, I would like to know (and see) how they will manage these reduced mouvements? In other words, how ...
Hi Magnus
Do you think the Nano fouydroyante makes any difference here. Surely leaving the 1/8 seconds off completely would use even less energy. The main hands are still I assume (!) driven by gears as normal. I am also guessing for the 180 day PR that virtually a...
Making a foudroyante is certainly not the goal...
but it is a simple complication with which one can well prove the technology. It is a first step. I think the goal is to make large portions of the movement eventially, to use the reduced inertia of the parts to increase the autonomy of the movements. My ...
Exactly my thinking, and I also believe the relative contribution of inertia moves to the tail end of the movement, i.e. the hands. However...
they are comparatively slow moving parts (let's consider for a movement the watch won't have a seconds hand). Thus, and I am asking you know as a watchmaker, would you think that the inertia problem there is as important as with faster moving components? ...
So, for a Friday night, we can curl up with a whisky and some equations.....
Magnus, Thanks for this report. I looked on the InterWeb immediately and Google search revealed nothing at first. I'll just read the executive summary. "In other words, the Nano Foudroyante EWT requires 1800x less energy and 96% less space!" Regards, MTF ...
Very interesting read , thanks 🙏🏻
Would love to see the watch in person , hope they will show this concept at SIHH
I see the goal, but with that small dial i fo not think the energy and inertia comparisons..
are indicative of a normal sized dial and hands