> So, where's the ADEV plot for Bill's Q1,Q2, and Q3? Does anybody have any ADEV data for mechanical clocks? (I didn't find any by google, but there was a lot of noise so maybe I missed something.) I'd expect a watch to slow down slightly as the spring unwinds. That probably doesn't apply to clocks driven by weights. -- These are my opinions. I hate spam.

			Attila Kinali

On Tue, 06 Mar 2018 21:10:00 -0800 Hal Murray <hmurray@megapathdsl.net> wrote: > Does anybody have any ADEV data for mechanical clocks? (I didn't find any by > google, but there was a lot of noise so maybe I missed something.) How about Tom's Powers of Ten? http://www.leapsecond.com/ten/clock-powers-of-ten-tvb.pdf Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson

> Does anybody have any ADEV data for mechanical clocks? (I didn't find any by > google, but there was a lot of noise so maybe I missed something.) Hal, It's often buried in out-of-print horological books or magazines / journals / articles that google may or may not index. I have some ADEV examples here: http://www.leapsecond.com/pages/m21/ -- the classic Navy chronometer http://www.leapsecond.com/pend/shortt/ -- see Stable32 / Timelab plots http://www.leapsecond.com/pend/clockb/ -- go to technical links http://www.leapsecond.com/hsn2006/ -- see dream pendulum paper > I'd expect a watch to slow down slightly as the spring unwinds. That > probably doesn't apply to clocks driven by weights. Clockmakers are clever and implement methods to keep constant power: https://en.wikipedia.org/wiki/Fusee_(horology) https://en.wikipedia.org/wiki/Maintaining_power Photo: https://www.wired.com/wp-content/uploads/archive/images/slideshow/2007/12/gallery_time_hackers/disk.jpg via https://www.wired.com/2008/01/gallery-time-hackers/ Diagrams: http://www.hamiltonparts.com/m21-6.jpg http://www.hamiltonparts.com/m21-8.jpg via http://www.hamiltonparts.com/hamilton.htm Additional photos: https://chronometerbookdotcom.files.wordpress.com/2017/11/broken-chain-labelled1.jpg via https://chronometerbook.com/2017/11/ https://chronometerbookdotcom.files.wordpress.com/2017/02/attach-to-fusee-1.jpg via https://chronometerbook.com/2017/02/13/27-fusee-chain-substitute/ /tvb