Hi all – I thought this mechanical clock was very interesting. You can experience it in high res 3D here: https://soyuz-clock-viewer.vercel.app/ I can't find any info on accuracy or stability. I'm thinking of the Hamilton mechanical ship's chronometers from WWII as a reference – what was their drift rate? I remember it was better than today's mechanical chronometer wristwatches. Curious Marc has technical details here: https://www.curiousmarc.com/space/soyuz-clock-mechanical Cheers, Joe Duarte

From their website The Clock is equipped with both built-in autonomous pulse generator and external high stability pulse in- put. The external pulses may come from either the АПВУ (Program-Timing Control Equipment) or KЛ110 TV unit. During launch/injection and autonomous orbital flight phases the БЧК is time synchronized with the АПВУ (Program-Timing Control Equipment). When the БЧК is time synchronized with the built-in generator the error is no more than 30 sec. a day. The external pulse time synchronized БЧК maximal error is 4.5 sec. Erik. On 1-9-2022 3:27, Joe Duarte via time-nuts wrote: > Hi all – I thought this mechanical clock was very interesting. You can > experience it in high res 3D here:https://soyuz-clock-viewer.vercel.app/ > > I can't find any info on accuracy or stability. I'm thinking of the > Hamilton mechanical ship's chronometers from WWII as a reference – what was > their drift rate? I remember it was better than today's mechanical > chronometer wristwatches. > > Curious Marc has technical details here: > https://www.curiousmarc.com/space/soyuz-clock-mechanical > > Cheers, > > Joe Duarte > _______________________________________________ > time-nuts mailing list --time-nuts@lists.febo.com > To unsubscribe send an email totime-nuts-leave@lists.febo.com

Hi Joe, A number of those "space" clocks were sold on eBay in 2003. Here are photos: http://leapsecond.com/pages/space-clock/ For your Hamilton chronometer performance question, see section "10^-7" of: http://leapsecond.com/ten/clock-powers-of-ten-tvb.pdf http://leapsecond.com/ten/ /tvb p.s. Note that time-nuts is not a "clock & watch" forum, so if you have additional mechanical clock comments I can point you to web sites or forums that focus on that topic. For more info on time-nuts see the home page: http://leapsecond.com/time-nuts.htm On 8/31/2022 6:27 PM, Joe Duarte via time-nuts wrote: > Hi all – I thought this mechanical clock was very interesting. You can > experience it in high res 3D here: https://soyuz-clock-viewer.vercel.app/ > > I can't find any info on accuracy or stability. I'm thinking of the > Hamilton mechanical ship's chronometers from WWII as a reference – what was > their drift rate? I remember it was better than today's mechanical > chronometer wristwatches. > > Curious Marc has technical details here: > https://www.curiousmarc.com/space/soyuz-clock-mechanical > > Cheers, > > Joe Duarte > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com