Dynamic Turtle
31
7750 question for all you techies
I recently bought a triple-register 12 hour chronograph (gulf war camo style thing - Meccaniche Veloci for anyone who cares) with a 7750 base. Still a horrid thing that reminds me of dark IWC GST days! Assuming a fully wound mainspring and engagement of the chronograph, how long would it take for the watch to stop? I'm just wondering how much mainspring torque the chrono function uses. Seems bizarre that anyone would need to time something for more than a few hours. I'd rather have a ticking second had three idle registers...
Thanks,
DT
7750 question for all you techies
I recently bought a triple-register 12 hour chronograph (gulf war camo style thing - Meccaniche Veloci for anyone who cares) with a 7750 base. Still a horrid thing that reminds me of dark IWC GST days! Assuming a fully wound mainspring and engagement of t...
Normally, the reduction of the power reserve ....
... by the chronograph function is not too drastic, maybe two to four hours, normally even less. So a fully wound 7750 should still run about 40 hours. For longer road trips, I do use the chronograph for several hours, and there is also sense in using it ...
Thanks
Very interesting point re the psuedo GMT function! I'm suprised the chrono doesn't use more juice. DT
The energy consumption is not so high ....
... the main chronograph hand has a very low mass, and the two tiny subcounter hands are also not so consuming. Of course things are entirely different with special kinds of indications, such as the numeric display of the Porsche Design monster. For this,...
it doesn't use any more power, it just adds more friction
Hi Dynamic Turtle, It's something of a misconception to think that chronographs use more power when they're on, and you can prove it to yourself experimentally with a simple test. Run a watch with the chronograph on until the watch stops. Then turn the ch...
