Hi The Shortt pendulum is what I'm basing the dual clock torsion pendulum stuff on.
Bob On Jan 9, 2010, at 9:02 PM, Lux, Jim (337C) wrote: > > > > On 1/9/10 4:36 PM, "Bob Camp" <[email protected]> wrote: > >> Hi >> >> If you abandoned the non-elecronic side of the requirement, you could hit it >> with a pulsed LED and probably get phase data off of a couple of photo >> detectors. >> >> Crazy stuff ... >> >> Bob >> > > But that's the whole challenge... You can build an entirely mechanical clock > with a performance of what? 4E-6 ADEV with a tau of 24 hrs (Harrison clock) > > > A Shortt pendulum (whatever that is, I'll have to go look it up) is 1E-7. A > friend of mine was trying to build a 1ppm pendulum clock 15 years ago, with > temperature compensated weights, etc. > > So, can one build a 1E-8 performance clock, without electricity? > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
