The first Russian experience with high-speed video (HS-video)
In Iternete are some interesting videos (Video library) of the process, but some important points are not affected there . First of all, the interaction of cue with Russian heavy billiard ball.
Now here are man who tries to fill these gaps. Alexander Sorokin from Novosibirsk began a series of experiments with high-speed video. I hope that the results will be of interest to you. I think the process with Russian ball and pool ball are very similar, and even likely with the Russian ball some phenomena will be more noticeable. Bravo guys!
For example, note in the the first moment of contact of tip and the ball, the top (about 1 inch) shaft moves toward the center of the ball (the opposite of english), while the shaft to about the middle of its length is moving in the direction from the center of the ball (in the direction of english).
A. Sorokin
Equipment:
Digital high-speed monochrome camera Phantom V12, 10 foot table, cues (courtesy of Oleg Ponomarev and Dimitri Komarov), a training ball with markings, spotlights a total capacity of 4 kW, a tripod, a laptop and pillow with goose down as the catcher of balls (the dowry of his wife :)).
Purpose:
Learning to use the camera to pick the best shooting modes, well, try to make the some video.
Result:
Top view of the shot with the right rotation (right english), the frequency of shooting 9,100 fps, an open bridge (119 MB)
Top view of the shot with the right rotation (right english), the frequency of shooting 9,100 fps, Loop bridge (100 MB)
Same with the lower speed shooting, but with higher resolution.
Top view of the shot with the right rotation (right english), the frequency of shooting 3,200 fps, an open bridge (146 MB)
Top view of the shot with the right rotation (right english), the frequency of shooting 3,200 fps, an Loop bridge (146 MB)
Top view of the central shot with no english, the frequency of shooting 3,200 fps (117 MB)
Wonderfull footage.
I especially like the way the leather qtip expands and kontrakts with the axial compression wave.
And i like seeing the multiple radial flex waves.
I think that the first inch of the wooden qtip duznt aktually moov towards the center of the qball. I think it stays more or less where it iz briefly, and then jumps away with the english.
I think that even for a central hit the qtip wants to moov radially offline, due to flex. The direktion it wants to moov probably depends on the straightness of the shaft, or, if straight, on the major axis of the grain.
Hencely i think that radial vibration and flex throw the qball offline (when hitting center), alltho u karnt see that here. Mightbe this initial vibration woz down, ie away from the camera.
mac.