Does squirt change with speed?
“Cue ball deflection” or “squirt” refers to the angular deflection of the CB immediately off the tip. This is the same for both soft and hard hits. However, the CB starts sliding immediately for a shot with English; and therefore, the CB “curves” or “swerves” until sliding stops and rolling begins. For a slow shot, the swerve happens quickly over a short distance, and this reduces the “effective deflection” or “effective squirt” or “squerve” for the shot. With a faster shot, the swerve is delayed and the effective squirt is larger. I have a good demo of this here: NV A.17 – Effective squirt vs. speed My squirt robot experiments, which measured squirt directly, without swerve corruption, clearly show that squirt does not depend on speed like many people think. The results can be viewed here: http://billiards.colostate.edu/bd_articles/2008/feb08.pdf The results are also consistent with tests with a human. See those results here: http://billiards.colostate.edu/bd_articles/2007/sept07.
