robert_bob_stefan
1
strange arrangements on pictures
Hi guys,
Sounds like I have to add up to Philipp's quest for understanding...
Actually, why I seem to understand his concern for moment variation between the 3 options offered by the manufacture, I seem to not understand the drawings showing those 3 options:
-
central second: I agree (would be hard not to!)
second at 9: the view being from bridges side (the axes going down, on the dial side), the "direct second" (which you call 4th wheel) cannot be at 9, rather at 10:30
- second at 10:30: if we look at the mvt from the other side, the designated wheel is lower than that of the 4th wheel, which confirms this is at 9 and the 4th wheel at 10:30.
Anyway, to come back to Philipp's point, I understand your question as such (please correct me if I get you wrong):
-
central second configuration: 4th wheel + central pinion are in gear
second at 9: 4th wheel + pinion at 9 are in gear
- second at 10:30: 4th wheel only is in gear,
If it's the case that in 3rd configuration (second at 10:30), no othe pinion is left, then there will be a difference in moment. If a pinion is left, which one is it? the one in center or the one at 9?
Would be nice to have your opinion about this, it's makes me scratch my head too, and I can't afford to loose any more hair because I scratch my hair because I don't get it :-(
Best regards to all on the forum,
Bob
PS: Peter, may I ask you how you came across a watch the name of is "prototype"? 
To my understanding, these are not yet available in the shops, I asked my local retailer :-(
Some thoughts on the new ref. 25820 Vintage45 "Square" and GP´s new caliber 4500
Dear enthusiasts, following up to our previous introduction , i´d like to have a closer look at GP´s new pre-SIHH introduction reference 25820, dubbed the Vintage 45 "Square" or "Carree": Vintage 1945 Carrée At the beginning of the 90s, well before "vinta...
Part 3 - some more details of the new caliber GP4500
As we´ve seen, the new GP4500 caliber incorporates some practical, new solutions to improve the efficiency, longevity and durability of this movement. It is promising to be an accurate, sturdy timekeeper for a long time to come. But is it a nice movement ...
Thanks a lot for this exciting pics and insights
Peter, that's a great thing what you're again doing for us! Amazing pictures I love very much. And I'm particularly glad to learn about and understand now this movement in a way I would like to be able to understand the 3XXX mvts. as well, which have not ...
Oh, there´s something for you!
Hi Alexander, thank you a lot! That´s much appreciated and the pleasure is completely on my side! In terms of the GP3xxx range, have a look here. There aren´t many chances to get much closer than this: http://www.tp178.com/jd/gp/article1b.html Sure it´s n...
Indeed,
thanks again for this hint, I didn't note this study before, best wishes for the feast days, Alex
Thank you Peter
Hello Peter, first I wanna thank you for this indepth look. I was wondering about how GP will provide the same moment with the central second position with a double third wheel, but with the second at 9 with a singular third wheel? Because in my opinion t...
Like this?
Hi Philipp, something like this? These are prototypes and in fact the GP4500 caliber with central second! While i can´t share details on upcoming models, at least it seems such is being evaluated very closely... Does this help a bit? Cheers, Peter...
More technical...
Hey Peter, hmm... that's not really what I meant, but also nice pictures of course. In part 2 you showed us a picture with details of the different variations of seconds. And if GP produces the second at 9 they perhaps will have different torques and thou...
Oh, that´s what the double third wheel is made for
G'day, regardless the attachment of the wheel driving the second hand, amplitude and performance will always be the same. As noted, that´s what the double third wheel is made for; the second hand pinion always engages the same wheel, eliminating the need ...
We're getting closer :o)
Hello Peter, yes in this case you're right. But what if you use the second wheel to display the small second at 9 without the second hand pinion like on the picture with only a single third wheel. You definitly will have less engagements in your going tra...
Well, i think that´s not possible
G'day, i´m rather tempted to trust GP´s engineer in this one Actually attaching a seconds hand onto the second wheel is a rather unconventional thing to do and as said, regardless the position of the second hand there´s no difference otherwise. In this i ...
Hi, Philippe,....
....I believe GP opted for this design for beeing flexible and vesatile. Of course one could use the classical small seconds design and use the fourth wheel directly to display the second. But, than you're also bound to design the train around it - i.e. o...
The black dial looks smart
Can't wait to "feel" it on my wrist thanks Peter cheers joe
