View Single Post
Old
  (#5)
Bob Jewett
Northern California

Bob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond reputeBob Jewett has a reputation beyond repute
 
Status: Offline
Posts: 12,704
vCash: 1700
iTrader: 10 / 100%
Join Date: Apr 2004
Location: Berkeley, CA
   
10-09-2014, 03:35 PM

It is also possible to measure the speed of a table with a stop watch. If you time a lag shot from far rail to stopping just before the near rail, the time in seconds squared times 2 gives you the reciprocal of the effective slope. So, 7 seconds for a lag to travel the length of the table gives:

7*7*2 = 98

slope = 1/98 = 1.0% more or less

On a carom table, it is not uncommon for a lag to take 10 seconds for the last lap of the lag:

10*10*1.8 = 180 (1.8 factor for a 10-foot table)

slope = 1/180 = 0.55%

Since most people can do lags and have stop watches or stop watch apps, this is a pretty simple and accurate way to measure table speed.

Also, if a video has a lag, you can pick the speed of the table off the time of the video.


Bob Jewett
SF Billiard Academy
  
Reply With Quote