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Michael Friedberg Wrote:2. The calibre 89360 (and 89361 and presumably 89365, although I didn't ask) use a different system to deal with the drop in amplitude. It is not that the balance and hairspring are adjusted for isochronism (althought they are) but rather that there is a different design to the chronograph, using a so-called "vertical clutch". The vertical clutch is a new design technique and not used in IWC's outsourced chronographs, which are Valjoux based. A discussion of the design of the 89360 can be found, I believe, in the archives and is based on a discussion with Stefan Ihnen, who designed the c. 89360 and is now IWC's Technical Director. The avoidance of amplitude loss here is uniquely a matter of parts-design and not fine-tuning.
Regards, Shing | email iwcforme1976 (at) gmail (dot) comtime does not change us. it just unfolds us. max frisch.all that really belongs to us is time; even he who has nothing else has that. baltasar gracian.
Last edited: 2012-12-08T16:07:20
Last edited: 2015-03-23T10:21:59
Last edited: 2015-02-25T17:29:14
Sincerely, Kelvin Leung_______________________________________________________________________________________Repeat after me: I don't need another IWC, I really don't need another IWC...
Last edited: 2012-07-08T06:44:20
minimalist Wrote:Thank you all...Anyway, I love a vertical clutch & column wheel... It's enough :)
Last edited: 2013-10-27T09:32:49
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