recoveryjones said:
...ps. When RJ gets on that certain money ball, he wants to find out the easiest way to cinch it and bring home the cash
Well, I wouldn't consider myself qualified to give advice, but when I really need to make it and position is of no concern (or can be obtained with speed control), and there's no real danger of scratching, I just roll the cueball.
I do this because throw is then very small, and although it can be reduced even more with some outside english, or perhaps inside, why mess with squirt and swerve. Here are some figures for throw (theoretical) for stun and with the cueball spinning at about half natural roll and then at full roll. The same applies if it has an equal amount of backspin, which Bob Jewett demonstrated for his latest article.
The second column is from Dr. Dave Alciatore's formulas, and the third is from mine. The cueball's speed is just around lag tempo. One degree of throw corresponds to very nearly one inch of sideways travel over the distance of the length of a cue stick.
Stun:
_____v = 5.000 mph = 2.235 m/sec
____rwz/v = 0.000___ rwx/v = 0.000
_______ Cut_____Throw_____Throw
______ Angle___ (u const)___ (u var)
_______ 0.00______0.00______0.00
_______ 5.00______0.72______0.72
_______10.00______1.44______1.44
_______15.00______2.19______2.19
_______20.00______2.98______2.98
_______25.00______2.78______3.54
_______30.00______2.40______2.59
_______35.00______2.10______2.05
_______40.00______1.86______1.70
_______45.00______1.68______1.46
_______50.00______1.53______1.29
_______55.00______1.41______1.17
_______60.00______1.32______1.08
_______65.00______1.25______1.01
_______70.00______1.20______0.96
_______75.00______1.16______0.93
_______80.00______1.13______0.90
_______85.00______1.12______0.89
_______90.00______1.11______0.57
Half-Roll:
_____ v = 5.000 mph = 2.235 m/sec
_____ rwz/v = 0.000__ rwx/v = 0.500
_______ Cut_____Throw_____Throw
______ Angle___ (u const)___ (u var)
_______ 0.00______0.00______0.00
_______ 5.00______0.41______0.47
_______10.00______0.77______0.85
_______15.00______1.04______1.10
_______20.00______1.22______1.23
_______25.00______1.32______1.27
_______30.00______1.37______1.26
_______35.00______1.37______1.22
_______40.00______1.35______1.16
_______45.00______1.32______1.11
_______50.00______1.28______1.06
_______55.00______1.24______1.02
_______60.00______1.21______0.98
_______65.00______1.18______0.95
_______70.00______1.16______0.93
_______75.00______1.14______0.91
_______80.00______1.12______0.89
_______85.00______1.12______0.88
_______90.00______1.11______0.57
Full Roll:
_____v = 5.000 mph = 2.235 m/sec
_____rwz/v = 0.000___rwx/v = 1.000
_______ Cut_____Throw_____Throw
______ Angle___ (u const)___ (u var)
_______0.00______0.00______0.00
_______ 5.00______0.10______0.08
_______10.00______0.19______0.16
_______15.00______0.29______0.24
_______20.00______0.38______0.32
_______25.00______0.47______0.39
_______30.00______0.56______0.46
_______35.00______0.64______0.53
_______40.00______0.72______0.59
_______45.00______0.79______0.65
_______50.00______0.85______0.70
_______55.00______0.91______0.74
_______60.00______0.96______0.78
_______65.00______1.01______0.82
_______70.00______1.05______0.84
_______75.00______1.08______0.86
_______80.00______1.10______0.87
_______85.00______1.11______0.88
_______90.00______1.11______0.57
As you can see, the biggest differences between stun vs draw/follow are at the moderate cut angles (0 - 40 degrees), where we like to shoot em. At very severe cut angles, it doesn't make much of a difference.
Why is less throw desirable? I don't know, maybe it isn't but it seems to work better for me on those long ones.
Jim