4Hz with 28800 vph
Dear Senior,
I have a Master 8 days and my friend ask me a simple question about 28800 vph calculation.
I cannot clear reply to my friend.
May I have a better answer from you?
kw
this might help
28,800bhp (beats per hour).
this means the seconds hand makes 28,800 separate little ticks each hour. divide this by 3600 (sec/hr) and you get 8. this means that between each second, there are 8 separate ticks. the more ticks that are present, the more precise the watch is.
for chronographs operated at 28,800bph, this also means the watch can only measure 1/8 second increments!!
at least this is what has been explained to me.
That's true....
That's true and that's why you get a 4 hertz frequency: 28800 vph divided by (60seconds x 60 minutes) equals 8.
8 means 4 cycles for the balance wheel per second so 4 htz.
Dje
many thx!
"8 means 4 cycles for the balance wheel per second so 4 htz."
Oh! many thx for your clear answer!
Watch Precision
I understand the 4Hz part of the explanation but I am not too clear about the part on higher beat would mean more "precise". Does it mean those with 6 beats per second (e.g. Journe's Souverain series) would not be as precise as those of JLC?
No! What mjnoumoff presumably meant was that ...
... a chronograph that has a balance oscillating with 28800 vph
could measure intervals of time more precise than one with a
lower beating balance - simply as a result of the fact that the
chronographs second hand moves every 1/8 of a second vs
1/6 or 1/5 of a second. But that is purely theoretical of course!
The precision of the watch itself cannot be derived by the rate
of its balance (alone).
Cheers
Christian