F.P. Journe

SuitbertW
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Reading 1/100 from a 3 Hz escapement......

Hi all,
F.P. Journe once again shows an incredibly interesting out of the box thinking, but what I find most fascinating - he's doing so in a very traditional "language". 

The  new chronogaph made me thinking though (not a bad thing at all ) - I'm sure it's a fascinating piece and   fact  is, it looks absolutely stunning - but.....
I should add a dsiclaimer here - probably I missd something or simply didn't understand it well enough, so bear with me

IMO, it's not a precise measuring instrument, at lleast not speaking for 1/100 of a second.

The actual reading will be more or less randomly for the following reason:
As I read the graphics of the movement layout, we look at a second going train for the chronograph with an additional escapement - this one beeing connected directly to the main going train escape wheel.

The nature of this layout is - the chronograph train will only advance during the original (main train) escapement action.
This means - given an average amplitude of 280° and an average lift agle of 50° - the chronograph train would be standing still during approximately  0.274 sec per  one full second. A full second  beeing 6 vibrations means we'd have to divide this appr. 0.274sec in 6 equal parts - let's say the chrono remains standig still 6 times a second for appr. 0.045 sec.  To make it even worse, the remaining increments in "action" have to catch up the time during this rest.

Not that it would be a real life problem  at all I'm sure the actual problem is to a much larger extent the human factor, but can't see how the hundreds reading could be precise (again speaking in hundreds here).

Hopefully someone better mathematically educated, or simply more enlightened will correct me
(Velociphile, where are you???? )

Best  regards
Suitbert

p.s. all actual numbers, roughly approximations only, of course)