Re: [Phys-L] Trinity Pendulum Q (was Re: checking the work for minus signs ... et cetera)

[Bernard Cleyet <bernard@cleyet.org>]

All!

Here’s my fit to the restart:  



Only every 30th datum is plotted.  

If my hypot. is correct, my questimate’s running Q is v.~ 1k, this method, which, of course, disagrees w/ the known drive method.

I presume the decay preceding the above is completely free, so I’ll “bc” analyze it.

bc required too long to know he could download every datum instead of 1/300th, and is too lazy to cheque Lupton’s thesis for the PG flag width.  

On 2015, May 17, , at 23:10, Hugh.Hunt <hemh1@cam.ac.uk> wrote:

> Dear Brian,
> I'm glad we agree!
> You might find this interesting to ponder:
> In 2009, October clock change, rather than putting it back one hour it was advanced by 23 hours. This meant that the free decay of the pendulum was even slower, because the gravity arms were lifted off the pendulum. But the interesting question is the restart. The exponential curve that shows the swing amplitude getting back to normal surely tells us something about the drive?
>
> <http://trin-hosts.trin.cam.ac.uk/clock/?menu_option=​data&from=​25/10/2009&channel=​amp&channel2=​0&to=​25/10/2009&xmax=​2&skip=​0&ymax=​54&ymin=​37>
>
> Food for thought.
>
> Best wishes
>
> Hugh
>  
>  
>  


cut (much)